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Автор: Grafiati
Опубліковано: 14 березня 2023

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1

Liu, Yanxia, Lin Zhao, Yagang Zhang, Letao Zhang, and Xingjie Zan. "Progress and Challenges of Mercury-Free Catalysis for Acetylene Hydrochlorination." Catalysts 10, no. 10 (October 20, 2020): 1218. http://dx.doi.org/10.3390/catal10101218.

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Анотація:
Activated carbon-supported HgCl2 catalyst has been used widely in acetylene hydrochlorination in the chlor-alkali chemical industry. However, HgCl2 is an extremely toxic pollutant. It is not only harmful to human health but also pollutes the environment. Therefore, the design and synthesis of mercury-free and environmentally benign catalysts with high activity has become an urgent need for vinyl chloride monomer (VCM) production. This review summarizes research progress on the design and development of mercury-free catalysts for acetylene hydrochlorination. Three types of catalysts for acetylene hydrochlorination in the chlor-alkali chemical industry are discussed. These catalysts are a noble metal catalyst, non-noble metal catalyst, and non-metallic catalyst. This review serves as a guide in terms of the catalyst design, properties, and catalytic mechanism of mercury-free catalyst for the acetylene hydrochlorination of VCM. The key problems and issues are discussed, and future trends are envisioned.
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2

Bereketova, Akerke, Muthuchamy Nallal, Mohammad Yusuf, Sanha Jang, Karthick Selvam, and Kang Hyun Park. "A Co-MOF-derived flower-like CoS@S,N-doped carbon matrix for highly efficient overall water splitting." RSC Advances 11, no. 27 (2021): 16823–33. http://dx.doi.org/10.1039/d1ra01883c.

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3

Shukla, M. K., Balendra V. S. Chauhan, Sneha Verma, and Atul Dhar. "Catalytic Direct Decomposition of NOx Using Non-Noble Metal Catalysts." Solids 3, no. 4 (December 2, 2022): 665–83. http://dx.doi.org/10.3390/solids3040041.

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Анотація:
Nitrogen oxides (NOx) gases, such as nitrous oxide (N2O), nitrogen oxide (NO), and nitrogen dioxide (NO2), are considered the most hazardous exhausts exhaled by industries and stationary and non-stationary application engines. Investigation of catalytic decomposition of NO has been carried out on copper ion exchanged with different bases, such as COK12, Nb2O5, Y-zeolite, and ZSM5. The catalytic decomposition of NO is widely accepted as an excellent method for the abatement of NO. However, the catalyst that achieves the highest reactivity in terms of NO decomposition is still a matter of research. The present paper aims to extend the research on the reactivity of non-noble metal-based catalysts using the direct decomposition method to remove NO from diesel engine exhaust. The reactivity of catalysts was observed in a quartz fixed bed reactor of 10 mm diameter placed in a furnace maintained at a temperature of 200 °C to 600 °C. The flow of NO was controlled by a mass flow controller, and the gas chromatography technique was used to observe the reactivity of the catalysts. Analysis showed that adding Cu to COK12, Nb2O5, Y-zeolite, and ZSM5 supports resulted in a rise in NO decomposition compared to stand-alone supports. Further experimental trials on the performance of Cu-ZSM5 at varying flow rates of NO showed that the NO decomposition activity of the catalyst was higher at lower flow rates of NO.
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4

Kim, Hyo-Sik, Hyun-Ji Kim, Ji-Hyeon Kim, Jin-Ho Kim, Suk-Hwan Kang, Jae-Hong Ryu, No-Kuk Park, Dae-Sik Yun, and Jong-Wook Bae. "Noble-Metal-Based Catalytic Oxidation Technology Trends for Volatile Organic Compound (VOC) Removal." Catalysts 12, no. 1 (January 7, 2022): 63. http://dx.doi.org/10.3390/catal12010063.

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Анотація:
Volatile organic compounds (VOCs) are toxic and are considered the most important sources for the formation of photochemical smog, secondary organic aerosols (SOAs), and ozone. These can also greatly affect the environment and human health. For this reason, VOCs are removed by applying various technologies or reused after recovery. Catalytic oxidation for VOCs removal is widely applied in the industry and is regarded as an efficient and economical method compared to other VOCs removal technologies. Currently, a large amount of VOCs are generated in industries with solvent-based processes, and the ratio of aromatic compounds is high. This paper covers recent catalytic developments in VOC combustion over noble-metal-based catalysts. In addition, this report introduces recent trends in the development of the catalytic mechanisms of VOC combustion and the deactivation of catalysts, such as coke formation, poisoning, sintering, and catalyst regeneration. Since VOC oxidation by noble metal catalysts depends on the support of and mixing catalysts, an appropriate catalyst should be used according to reaction characteristics. Moreover, noble metal catalysts are used together with non-noble metals and play a role in the activity of other catalysts. Therefore, further elucidation of their function and catalytic mechanism in VOC removal is required.
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5

Hao, Zhuo, Yangyang Ma, Yisong Chen, Pei Fu, and Pengyu Wang. "Non-Noble Metal Catalysts in Cathodic Oxygen Reduction Reaction of Proton Exchange Membrane Fuel Cells: Recent Advances." Nanomaterials 12, no. 19 (September 24, 2022): 3331. http://dx.doi.org/10.3390/nano12193331.

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Анотація:
The oxygen reduction reaction (ORR) is one of the crucial energy conversion reactions in proton exchange membrane fuel cells (PEMFCs). Low price and remarkable catalyst performance are very important for the cathode ORR of PEMFCs. Among the various explored ORR catalysts, non-noble metals (transition metal: Fe, Co, Mn, etc.) and N co-doped C (M–N–C) ORR catalysts have drawn increasing attention due to the abundance of these resources and their low price. In this paper, the recent advances of single-atom catalysts (SACs) and double-atom catalysts (DACs) in the cathode ORR of PEMFCs is reviewed systematically, with emphasis on the synthesis methods and ORR performance of the catalysts. Finally, challenges and prospects are provided for further advancing non-noble metal catalysts in PEMFCs.
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6

Waikar, Jyoti, Hari Pawar, and Pavan More. "REVIEW ON CO OXIDATION BY NOBLE AND NON-NOBLE METAL BASED CATALYST." Catalysis in Green Chemistry and Engineering 2, no. 1 (2019): 11–24. http://dx.doi.org/10.1615/catalgreenchemeng.2019030245.

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7

Song, Jialin, Ziliang Wang, Xingxing Cheng, and Xiuping Wang. "State-of-Art Review of NO Reduction Technologies by CO, CH4 and H2." Processes 9, no. 3 (March 23, 2021): 563. http://dx.doi.org/10.3390/pr9030563.

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Анотація:
Removal of nitrogen oxides during coal combustion is a subject of great concerns. The present study reviews the state-of-art catalysts for NO reduction by CO, CH4, and H2. In terms of NO reduction by CO and CH4, it focuses on the preparation methodologies and catalytic properties of noble metal catalysts and non-noble metal catalysts. In the technology of NO removal by H2, the NO removal performance of the noble metal catalyst is mainly discussed from the traditional carrier and the new carrier, such as Al2O3, ZSM-5, OMS-2, MOFs, perovskite oxide, etc. By adopting new preparation methodologies and introducing the secondary metal component, the catalysts supported by a traditional carrier could achieve a much higher activity. New carrier for catalyst design seems a promising aspect for improving the catalyst performance, i.e., catalytic activity and stability, in future. Moreover, mechanisms of catalytic NO reduction by these three agents are discussed in-depth. Through the critical review, it is found that the adsorption of NOx and the decomposition of NO are key steps in NO removal by CO, and the activation of the C-H bond in CH4 and H-H bonds in H2 serves as a rate determining step of the reaction of NO removal by CH4 and H2, respectively.
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8

Akinlolu, Kayode, Bamgboye Omolara, Tripathi Shailendra, Akinsiku Abimbola, and Ogunniran Kehinde. "Synthesis, characterization and catalytic activity of partially substituted La1−xBaxCoO3 (x ≥ 0.1 ≤ 0.4) nano catalysts for potential soot oxidation in diesel particulate filters in diesel engines." International Review of Applied Sciences and Engineering 11, no. 1 (April 2020): 52–57. http://dx.doi.org/10.1556/1848.2020.00007.

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Анотація:
AbstractThe sol gel method was used in preparing a series of A site partially substituted La1−xBaxCoO3 (x ≥ 0.1 ≤ 0.4) perovskite catalysts coded LBC1, 2, 3, and 4 and their potential as catalysts for soot oxidation were evaluated. The Brunauer–Emmett–Teller (BET), Inductively Coupled Plasma Atomic Emission Spectroscopy (ICPAES), Thermogravimetric/Differential Thermal Analysis (TGA/DTG), X-ray analysis (XRD) were used in characterizing the prepared perovskite catalyst. The result shows that at (x≥ 0.2 ≤ 0.4), there was an increase in surface area when we compare it with that of x = 0. The increase in surface area helps in increasing the catalytic performance of the catalyst. Also, when evaluating the catalytic performance of the synthesized catalysts, it was observed that doping the perovskite catalysts helped in the general improvement of the catalytic performance for soot oxidation. The best performance in this research study with a T50 of 484 °C was observed at x = 0.2 catalyst (LBC2). This shows that the non-noble perovskite catalysts prepared in this research study has the potential to replace the noble metal based catalysts used presently in the diesel automotive industry.
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9

Wei, Lei, Xiaomeng Wang, Ya-Na Yu, Hongyan Liu, Yepei Li, and Ya-Ni Zhang. "CoB/C3N4 photocatalyst for rapid hydrogen evolution from hydrolysis of sodium borohydride under light irradiation." Functional Materials Letters 14, no. 02 (February 2021): 2150013. http://dx.doi.org/10.1142/s1793604721500132.

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Анотація:
For practical application of sodium borohydride (NaBH[Formula: see text] hydrolysis to generate hydrogen, metallic catalysts with low cost but excellent activity are highly desired. However, it remains a big challenge to further improve the activity of non-noble metal catalysts. In this work, photocatalysis technology was successfully introduced to enhance the catalyst activity for NaBH4 hydrolysis. By means of conventional impregnation-reduction method, CoB nanocatalyst was evenly deposited on graphitic carbon nitride surface, resulting in a Schottky-type photocatalyst (CoB/CN). As expected, hydrogen generation rate was greatly boosted owing to light irradiation. According to the results of capture experiments, photoexcited electron from g-C3N4 could enrich the electron density of CoB surface, which leads to the improvement of catalyst activity. Additionally, the light irradiation facilitates the remarkable decrease of apparent activation energy. Compared with some reported noble metal catalysts, the CoB/CN presents higher activity, especially under light irradiation.
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10

Lv, Changpeng, Dan Du, Chao Wang, Yingyue Qin, Jinlong Ge, Yansong Han, Junjie Zhu, and Muxin Liu. "The Flower-like Co3O4 Hierarchical Microspheres for Methane Catalytic Oxidation." Inorganics 10, no. 4 (April 2, 2022): 49. http://dx.doi.org/10.3390/inorganics10040049.

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Анотація:
The development of non-noble Co3O4 catalysts exposing highly active crystal planes to low-temperature methane oxidation is still a challenge. Hence, a facile solvothermal method was adapted to construe flower-like Co3O4 hierarchical microspheres (Co3O4-FL), which are composed of nanosheets with dominantly exposed {112} crystal planes. The flower-like hierarchical structure not only promotes the desorption of high levels of active surface oxygen and enhances reducibility, but also facilitates an increase in lattice oxygen as the active species. As a result, Co3O4-FL catalysts offer improved methane oxidation, with a half methane conversion temperature (T50) of 380 °C (21,000 mL g−1 h−1), which is much lower than that of commercial Co3O4 catalysts (Co3O4-C). This study will provide guidance for non-noble metal catalyst design and preparation for methane oxidation and other oxidative reactions.
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11

Millán, Reisel, María Dolores Soriano, Cristina Cerdá Moreno, Mercedes Boronat, and Patricia Concepción. "Combined Spectroscopic and Computational Study of Nitrobenzene Activation on Non-Noble Metals-Based Mono- and Bimetallic Catalysts." Nanomaterials 11, no. 8 (August 10, 2021): 2037. http://dx.doi.org/10.3390/nano11082037.

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In this paper, substituted anilines are industrially obtained by direct hydrogenation of nitroaromatic compounds with molecular H2 using metals as catalysts. Previous theoretical studies proposed that the mechanism of the reaction depends on the nature of the metal used as a catalyst, and that rationally designed bimetallic materials might show improved catalytic performance. Herein, we present IR spectroscopic studies of nitrobenzene interactions with monometallic Ni/SiO2, Cu/SiO2 and Pd/SiO2, and with bimetallic CuNi/SiO2 and CuPd/SiO2 catalysts, both in the absence and presence of H2, combined with density functional theory (DFT) calculations on selected bimetallic NiCu(111) and PdCu(111) models. The results obtained experimentally confirm that the reaction mechanism on non-noble metals such as Ni proceeds through N-O bond dissociation, generating nitrosobenzene intermediates, while, on noble metals, such as Pd, H-attack is necessary to activate the NO bond. Moreover, a bimetallic CuPd/SiO2 catalyst with a Pd enriched surface is prepared that exhibits an enhanced H2 dissociation ability and a particular reactivity at the boundary between the two metals.
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12

Monteiro, Rodolpho R. C., Isabela A. dos Santos, Maria R. A. Arcanjo, Célio L. Cavalcante, Francisco M. T. de Luna, Roberto Fernandez-Lafuente, and Rodrigo S. Vieira. "Production of Jet Biofuels by Catalytic Hydroprocessing of Esters and Fatty Acids: A Review." Catalysts 12, no. 2 (February 20, 2022): 237. http://dx.doi.org/10.3390/catal12020237.

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Анотація:
The transition from fossil to bio-based fuels is a requisite for reducing CO2 emissions in the aviation sector. Jet biofuels are alternative aviation fuels with similar chemical composition and performance of fossil jet fuels. In this context, the Hydroprocessing of Esters and Fatty Acids (HEFA) presents the most consolidated pathway for producing jet biofuels. The process for converting esters and/or fatty acids into hydrocarbons may involve hydrodeoxygenation, hydrocracking and hydroisomerization, depending on the chemical composition of the selected feedstock and the desired fuel properties. Furthermore, the HEFA process is usually performed under high H2 pressures and temperatures, with reactions mediated by a heterogeneous catalyst. In this framework, supported noble metals have been preferably employed in the HEFA process; however, some efforts were reported to utilize non-noble metals, achieving a similar performance of noble metals. Besides the metallic site, the acidic site of the catalyst is crucial for product selectivity. Bifunctional catalysts have been employed for the complete process of jet biofuel production with standardized properties, with a special remark for using zeolites as support. The proper design of heterogeneous catalysts may also reduce the consumption of hydrogen. Finally, the potential of enzymes as catalysts for intermediate products of the HEFA pathway is highlighted.
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13

Won, Da Hye, Seong Ihl Woo, Hyungjun Kim, Yun Jeong Hwang, and Byoung Koun Min. "High Index Non-Noble Metal Electrocatalysts for Electrochemical CO2 Reduction to C1 Products." ECS Meeting Abstracts MA2018-01, no. 31 (April 13, 2018): 1827. http://dx.doi.org/10.1149/ma2018-01/31/1827.

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Анотація:
Accumulation of CO2 in the atmosphere triggers abnormal weather phenomenon through global warming and greenhouse effect. To reduce the CO2 concentration and its emission, extensive researches for CO2 capture, storage, and utilization have been conducted. Among them, electrochemical CO2 conversion is highly promising due to its ambient reaction conditions, high energy efficiency, and facile combination with other renewable energy source. However, because CO2 is chemically stable, the principal obstacle is to develop suitable catalyst having good catalytic activity, selectivity, and stability. Among various metal candidates, transition and post-transition metals have attracted much attention due to its low-cost, low-toxicity, and intrinsic catalytic property for CO2 reduction. Since general electrochemical catalysis is highly correlated with mass diffusion, crystal orientation, surface area, and conductivity, manipulating the catalyst structure is an effective method to improve catalytic performance. Furthermore, collaborative studies integrating experimental and theoretical approaches have been conducted for the investigation of CO2 reduction mechanism and suggestion of a rational design of a CO2 reduction catalyst. Herein, we developed hierarchical nanostructured Sn, Bi, and Zn electrodes as electrocatalysts for CO2 reduction to C1 products (e.g., formic acid/formate and carbon monoxide). Various structured catalysts such as Sn dendrite, Bi dendrite, and hexagonal Zn were fabricated by facile electrodeposition methods. The synthesized catalyst electrodes showed highly efficient CO2 reduction activity in terms of current density, Faradaic efficiency, and more importantly, stable performance during long-term operation. Sn dendrite and Bi dendrite electrodes exhibited a superior formate/formic acid production rates (Sn dendrite: 228.6 mmol h-1 cm-2 at -1.36 VRHE) and high Faradaic efficiency (Bi dendrite: 90% at -0.73 VRHE) without any considerable catalytic degradation during 18 h and 12 h of long-term operations, respectively. Furthermore, the hexagonal Zn catalyst showed a high CO selectivity up to ~95% during unprecedented long-time over 30 h. It is worth noted that their high selectivity towards CO2 reduction is attributed to their local (or chemical) structures. In case of Sn electrode, we found that the native O content on the Sn surface is strongly correlated with the stabilization of reaction intermediate and the formate selectivity. To understand in-depth the factors to affect the CO2 reduction, we further conducted the theoretical studies about the mechanism of CO2 conversion to formic acid on various Bi planes such as close-packed and high-index surfaces using density functional theory calculation (DFT). We demonstrated that the most energetically favorable pathway was a path through the formation of oxygen bidentate intermediate (*OCOH) among the three possible pathways for formic acid formation. In addition, it was also revealed that the high-index Bi surfaces exhibited the lower reduction potential than the closed-packed surface of (003) plane. Similarly, in electrochemical analysis using Zn electrodes, it was figured out that Zn (101) facet was favorable to CO formation whereas Zn (002) facet, most stable surface, favors the H2 evolution during CO2 electrolysis. Indeed, DFT calculations showed that Zn (101) facet lowers the reduction potential for CO2 to CO by more effectively stabilizing a *COOH intermediate than Zn (002) facet. Consequently, the coordinately unsaturated sites derived from the nanostructured non-noble metal catalysts can effectively stabilize the reaction intermediate by lowering the energy barrier for its binding to the site. These results may suggest a design principle for further developments in other advanced catalysts as well as in CO2 reduction. Figure 1
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14

Redina, Elena, Olga Tkachenko, and Tapio Salmi. "Recent Advances in C5 and C6 Sugar Alcohol Synthesis by Hydrogenation of Monosaccharides and Cellulose Hydrolytic Hydrogenation over Non-Noble Metal Catalysts." Molecules 27, no. 4 (February 17, 2022): 1353. http://dx.doi.org/10.3390/molecules27041353.

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Анотація:
A new reality of the 21st century is the transition to a new type of economy and energy concepts characterized by the replacement of existing petrochemical routes to a bio-based circular economy. The needs for new strategies in obtaining basic products from bio-based resources with minimum CO2 traces has become mandatory. In this review, recent trends in the conversion of biomass-derived molecules, such as simple monomeric sugars and cellulose, to industrially important C5 and C6 sugar alcohols on heterogeneous catalysts based on non-noble metals are discussed focusing on the influence of catalyst structures and reaction conditions used on the substrate conversion and product selectivity. The challenges and prominent ideas are suggested for the further development of catalytic hydrogenation of naturally abundant carbohydrates to value-added chemicals on non-noble metal catalysts.
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15

Sim, Yelyn, Jude John, Subramani Surendran, Byeolee Moon, and Uk Sim. "Efficient Photoelectrochemical Water Splitting Reaction using Electrodeposited Co3Se4 Catalyst." Applied Sciences 9, no. 1 (December 21, 2018): 16. http://dx.doi.org/10.3390/app9010016.

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Анотація:
Photoelectrochemical water splitting is a promising field for sustainable energy production using hydrogen. Development of efficient catalysts is essential for resourceful hydrogen production. The most efficient catalysts reported to date have been extremely precious rare-earth metals. One of the biggest hurdles in this research area is the difficulty of developing highly efficient catalysts comparable to the noble metal catalysts. Here, we report that non-noble metal dichalcogenide (Co3Se4) catalysts made using a facile one-pot electrodeposition method, showed highly efficient photoelectrochemical activity on a Si photocathode. To enhance light collection and enlarge its surface area even further, we implemented surface nanostructuring on the Si surface. The nanostructured Si photoelectrode has an effective area greater than that of planar silicon and a wider absorption spectrum. Consequently, this approach exhibits reduced overvoltage as well as increased photo-catalytic activity. Such results show the importance of controlling the optimized interface between the surface structure of the photoelectrode and the electrodeposited co-catalyst on it to improve catalytic activity. This should enable other electrochemical reactions in a variety of energy conversion systems.
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16

Cabrero-Antonino, Jose R., Rosa Adam, Kathrin Junge, Ralf Jackstell, and Matthias Beller. "Cobalt-catalysed transfer hydrogenation of quinolines and related heterocycles using formic acid under mild conditions." Catalysis Science & Technology 7, no. 10 (2017): 1981–85. http://dx.doi.org/10.1039/c7cy00437k.

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Анотація:
For the first time, transfer hydrogenation of quinolines and related heterocycles is performed with a non-noble metal based catalyst. [Co(BF4)2·6H2O] in combination with phosphine L1 catalyses selectively, the mild reduction of N-heteroarenes using formic acid as hydrogen donor.
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17

Safaat, Muhammad, Indri Badria Adilina, and Silvester Tursiloadi. "A Review on the Hydroisomerisasion of n-Parafins over Supported Metal Catalysts." Jurnal Rekayasa Proses 15, no. 2 (December 30, 2021): 141. http://dx.doi.org/10.22146/jrekpros.67587.

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Анотація:
Catalytic hydroisomerization of n-paraffin aims to produce branched paraffin isomers and suppress cracking reactions in the production of the low cloud point of biodiesel. The development of the type of metal and catalyst support, amount of metal loading, and reaction conditions are important to increase the catalyst activity. A high performace catalyst for hydroisomerization bears bifunctional characteristics with a high level of hydrogenation active sites and low acidity, maximizing the progress of hydroisomerization compared to the competitive cracking reaction. In addition, a catalyst support with smaller pore size can hinder large molecular structure isoparaffins to react on the acid site in the pore thus providing good selectivity for converting n-paraffin. Catalysts loaded with noble metals (Pt or Pd) showed significantly higher selectivity for hydroisomerization than non-noble transition metals such as Ni, Co, Mo and W. The reaction temperature and contact time are also important parameters in hydroisomerization of long chain paraffin, because long contact times and high temperatures tend to produce undesired byproducts of cracking. This review reports several examples of supported metal catalyst used in the hydroisomerization of long chain hydrocarbon n-paraffins under optimized reaction conditions, providing the best isomerization selectivity results with the lowest amount of byproducts. The role of various metals and their supports will be explained mainly for bifunctional catalysts.
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18

Ketpang, Kriangsak, Apikom Boonkitkoson, Nattawan Pitipuech, Chedthawut Poompipatpong, Jakkid Sanetuntikul, and Sangaraju Shanmugam. "Highly Active and Durable Transition Metal-Coordinated Nitrogen Doped Carbon Electrocatalyst for Oxygen Reduction Reaction in Neutral Media." E3S Web of Conferences 141 (2020): 01005. http://dx.doi.org/10.1051/e3sconf/202014101005.

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Анотація:
The major technical obstacles in commercialization of microbial fuel cell technology are the sluggish kinetic, high cost, and poor durability of an air cathode electrocatalyst. This research aimed to synthesize the highly active, stable and low cost non-precious metal catalyst to replace the expensive Pt electrocatalyst using a simple, low cost and scalable method. The Fe3C and Fe-N-C catalysts were prepared by direct heating the precursors under autogenic pressure conditions. X-ray diffraction pattern revealed the phase of Fe3C sample was cohenite Fe3C and graphitic carbon, while the phase of Fe-N-C catalyst was only graphitic carbon. The morphology of the synthesized catalysts was a highly porous structure with nanoparticle morphology. The surface area of the Fe3C and the Fe-N-C catalysts was 295 and 377 m2 g-1, respectively. The oxygen reduction reaction (ORR) activity of Fe-N-C catalyst was more active than Fe3C catalyst. The ORR performance of Fe-N-C catalyst exhibited about 1.6 times more superior to that of the noble Pt/C catalyst. In addition, the Fe-N-C catalyst was durable to operate under neutral media. Thus, a novel autogenic pressure technique was a promising method to effectively prepare an highly active and durable non-precious metal catalyst to replace the precious Pt/C catalyst.
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19

Lim, Sung Yul, Yang-Rae Kim, Kyungyeon Ha, Jong-Kwon Lee, Jae Gyeong Lee, Woohyuk Jang, Jin-Young Lee, Je Hyun Bae, and Taek Dong Chung. "Light-guided electrodeposition of non-noble catalyst patterns for photoelectrochemical hydrogen evolution." Energy & Environmental Science 8, no. 12 (2015): 3654–62. http://dx.doi.org/10.1039/c5ee02863a.

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20

Ejeta, Shibiru Yadeta, and Toyoko Imae. "Cobalt Incorporated Graphitic Carbon Nitride as a Bifunctional Catalyst for Electrochemical Water-Splitting Reactions in Acidic Media." Molecules 27, no. 19 (September 30, 2022): 6445. http://dx.doi.org/10.3390/molecules27196445.

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Анотація:
Non-noble metal-based bifunctional electrocatalysts may be a promising new resource for electrocatalytic water-splitting devices. In this work, transition metal (cobalt)-incorporated graphitic carbon nitride was synthesized and fabricated in electrodes for use as bifunctional catalysts. The optimum catalytic activity of this bifunctional material for the hydrogen evolution reaction (HER), which benefitted at a cobalt content of 10.6 wt%, was promoted by the highest surface area and conductivity. The activity achieved a minimum overpotential of ~85 mV at 10 mA/cm2 and a Tafel slope of 44.2 mV/dec in an acidic electrolyte. These values of the HER were close to those of a benchmark catalyst (platinum on carbon paper electrode). Moreover, the kinetics evaluation at the optimum catalyst ensured the catalyst flows (Volmer–Heyrovsky mechanism), indicating that the adsorption step is rate-determining for the HER. The activity for the oxygen evolution reaction (OER) indicated an overpotential of ~530 mV at 10 mAcm−2 and a Tafel slope of 193.3 mV/dec, which were slightly less or nearly the same as those of the benchmark catalyst. Stability tests using long-term potential cycles confirmed the high durability of the catalyst for both HER and OER. Moreover, the optimal bifunctional catalyst achieved a current density of 10 mAcm−2 at a cell voltage of 1.84 V, which was slightly less than that of the benchmark catalyst (1.98 V). Thus, this research reveals that the present bifunctional, non-noble metallic electrocatalyst is adequate for use as a water-splitting technology in acidic media.
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21

Zhang, Baikai, Wenzhi Li, Xiaomeng Dou, Jindong Wang, Lele Jin, Ajibola T. Ogunbiyi, and Xiaosen Li. "Catalytic depolymerization of Kraft lignin to produce liquid fuels via Ni–Sn metal oxide catalysts." Sustainable Energy & Fuels 4, no. 3 (2020): 1332–39. http://dx.doi.org/10.1039/c9se01089k.

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22

Chuai, Yunhan. "Graphene based non-noble metal catalyst for oxygen reduction reaction." IOP Conference Series: Earth and Environmental Science 384 (November 29, 2019): 012057. http://dx.doi.org/10.1088/1755-1315/384/1/012057.

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23

Tasic, Gvozden S., Scepan S. Miljanic, Milica P. Marceta Kaninski, Djordje P. Saponjic, and Vladimir M. Nikolic. "Non-noble metal catalyst for a future Pt free PEMFC." Electrochemistry Communications 11, no. 11 (November 2009): 2097–100. http://dx.doi.org/10.1016/j.elecom.2009.09.003.

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24

Ji, Jiawei, Tianqing Zhang, Lunhuan Xia, Zikai Chen, Weikai Wang, and Xiaokang Wan. "Design of cobalt nickel nitrides/carbon nitride composite catalysts for enhanced electrochemical water splitting." Journal of Physics: Conference Series 2334, no. 1 (August 1, 2022): 012011. http://dx.doi.org/10.1088/1742-6596/2334/1/012011.

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Анотація:
Abstract Design of efficient non-noble metal electrocatalysts for oxygen evolution reaction (OER) have been considered as a crucial issue in the development of future renewable energy utilization. In this paper, we report a composite structure of cobalt nickel nitrides and carbon nitrides as efficient OER electrocatalysts. A facile hydrothermal method was utilized to synthesize the precursors, then the samples were treated with melamine and heated in an N2 atmosphere. The successful preparation of the cobalt nitride nickel/carbon nitride composite catalysts was confirmed by SEM, XRD, and the OER electrochemical performance characterizations. The Co2NiNx/CN catalyst demonstrate an optimal electrocatalytic performance with an overpotential of 0.62 V to reach the current density of 10 mA/cm2, which is lower than that of Ni3N, Ni3N/CN and Co2NiNx. The Tafel slope of Co2NiNx/CN catalyst is only 83.68 mV/dec. The significantly improved electrocatalytic ability is owing to the synergetic effect of cobalt incorporation and imbedding of carbon nitride. The electrochemical impedance spectroscopy characteristics were further investigated to understand the mechanism of the novel non-noble metal electrocatalysts with high efficiency.
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25

Hajdu, Viktória, Emőke Sikora, Ferenc Kristály, Gábor Muránszky, Béla Fiser, Béla Viskolcz, Miklós Nagy, and László Vanyorek. "Palladium Decorated, Amine Functionalized Ni-, Cd- and Co-Ferrite Nanospheres as Novel and Effective Catalysts for 2,4-Dinitrotoluene Hydrogenation." International Journal of Molecular Sciences 23, no. 21 (October 30, 2022): 13197. http://dx.doi.org/10.3390/ijms232113197.

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Анотація:
2,4-diaminotoluene (TDA) is one of the most important polyurethane precursors produced in large quantities by the hydrogenation of 2,4-dinitrotoluene using catalysts. Any improvement during the catalysis reaction is therefore of significant importance. Separation of the catalysts by filtration is cumbersome and causes catalyst loss. To solve this problem, we have developed magnetizable, amine functionalized ferrite supported palladium catalysts. Cobalt ferrite (CoFe2O4-NH2), nickel ferrite (NiFe2O4-NH2), and cadmium ferrite (CdFe2O4-NH2) magnetic catalyst supports were produced by a simple coprecipitation/sonochemical method. The nanospheres formed contain only magnetic (spinel) phases and show catalytic activity even without noble metals (palladium, platinum, rhodium, etc.) during the hydrogenation of 2,4-dinitrotoluene, 63% (n/n) conversion is also possible. By decorating the supports with palladium, almost 100% TDA selectivity and yield were ensured by using Pd/CoFe2O4-NH2 and Pd/NiFe2O4-NH2 catalysts. These catalysts possess highly favorable properties for industrial applications, such as easy separation from the reaction medium without loss by means of a magnetic field, enhanced reusability, and good dispersibility in aqueous medium. Contrary to non-functionalized supports, no significant leaching of precious metals could be detected even after four cycles.
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26

Chen, Dan, Yao Xu, Yingying Zhang, Wenyu Sheng, and Guangren Qian. "Nickel hydroxide as a non-noble metal co-catalyst decorated on Cd0.5Zn0.5S solid solution for enhanced hydrogen evolution." RSC Advances 11, no. 33 (2021): 20479–85. http://dx.doi.org/10.1039/d1ra03938e.

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27

Chen, Qing, Zhou Zhang, Ruiquan Zhang, Maocong Hu, Ling Shi, and Zhenhua Yao. "Recent Progress of Non-Pt Catalysts for Oxygen Reduction Reaction in Fuel Cells." Processes 11, no. 2 (January 23, 2023): 361. http://dx.doi.org/10.3390/pr11020361.

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Анотація:
In recent years, non-Pt-based ORR catalysts have been developing rapidly and have achieved performance comparable to or even surpassing Pt precious metal catalysts in specific reactions, offering new possibilities for Pt-based catalyst replacement and showing great promise for application. This paper reviews the recent research progress of non-Pt-based fuel cell ORR catalysts. The latest research progress of non-Pt-based ORR SACs (including single metal active site ORR SACs, multi-metal active site ORR SACs, and non-Pt-based noble metal catalyst ORR SACs), non-metallic ORR catalysts, alloy-based ORR catalysts, high-entropy alloy ORR catalysts, and other non-Pt-based fuel cell ORR catalysts are presented in detail. This paper discusses in detail the synthesis methods, characterization means, optimization of performance, and application prospects of these non-Pt-based ORR catalysts. In addition, this review details the excellent performance of these catalysts in terms of compositional and structural controllability, electrical conductivity, and chemical stability, as well as their ability to exhibit ORR activity comparable to that of commercial Pt/C catalysts. This field is full of opportunities and challenges. In summary, non-Pt-based fuel cells show great potential in ORR. With the continuous improvement of preparation and characterization technologies, catalysts have broad application and market prospects. In addition, the development trend of non-precious metal fuel cell catalysts is reviewed.
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28

Crawford, James M., Courtney S. Smoljan, Jolie Lucero, and Moises A. Carreon. "Deoxygenation of Stearic Acid over Cobalt-Based NaX Zeolite Catalysts." Catalysts 9, no. 1 (January 4, 2019): 42. http://dx.doi.org/10.3390/catal9010042.

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Анотація:
For the production of sustainable biofuels from lipid biomass it is essential to develop non-noble metal catalysts with high conversion and selectivity under inert gas atmospheres. Herein, we report a novel cobalt-based catalyst supported on zeolite NaX via ion-exchange synthesis. The resultant bifunctional cobalt-based NaX zeolite catalyst displayed high conversion of stearic acid to liquid fuels. In addition, the effect of reaction temperature and catalyst loading was studied to evaluate the order of reaction and activation energy. Decarboxylation and decarbonylation were the dominant deoxygenation pathways. Stearic acid was successfully deoxygenated in N2 atmospheres using Co/NaX catalysts with a conversion as high as 83.7% and a yield to heptadecane up to ~28%. Furthermore, we demonstrate that higher reaction temperatures resulted in competing pathways of decarboxylation and decarbonylation. Finally, the fresh and recycled catalysts were characterized showing modest recyclability with a ~12.5% loss in catalytic activity.
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29

Cui, Liting, Lirui Cui, Zhengjian Li, Jin Zhang, Haining Wang, Shanfu Lu, and Yan Xiang. "A copper single-atom catalyst towards efficient and durable oxygen reduction for fuel cells." Journal of Materials Chemistry A 7, no. 28 (2019): 16690–95. http://dx.doi.org/10.1039/c9ta03518d.

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30

Frontera, Patrizia, Pier Luigi Antonucci, and Anastasia Macario. "Focus on Materials for Sulfur-Resistant Catalysts in the Reforming of Biofuels." Catalysts 11, no. 9 (August 26, 2021): 1029. http://dx.doi.org/10.3390/catal11091029.

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Анотація:
The reforming of biofuels represents a promising technology for low carbon and renewable hydrogen production today. The core of the process is an active and stable catalyst, which can help to improve this technology and its efficiency. With this review, we aim to survey the more relevant literature on heterogeneous catalysts for the reforming of biofuels with improved sulfur tolerance. The review is structured into four main sections. Following the introduction, the fundamental aspects of sulfur poisoning are discussed. In the third section, the basic principles of the reforming of biofuels are reported, and finally, in the fourth section—the core of the review—recent progresses in the development of sulfur resistant catalysts are discussed, distinguishing the role of the metal (noble and non-noble) from that of the support.
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31

Huang, Huaquan, Changping Jian, Yijia Zhu, Rou Guo, Xujian Chen, Fang-Fang Wang, De-Li Chen, Fumin Zhang, and Weidong Zhu. "Single non-noble metal atom doped C2N catalysts for chemoselective hydrogenation of 3-nitrostyrene." Physical Chemistry Chemical Physics 23, no. 45 (2021): 25761–68. http://dx.doi.org/10.1039/d1cp03858c.

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32

Ren, Dezhang, Xinyan Wan, Fangming Jin, Zhiyuan Song, Yunjie Liu, and Zhibao Huo. "Selective hydrogenation of levulinate esters to 1,4-pentanediol using a ternary skeletal CuAlZn catalyst." Green Chemistry 18, no. 22 (2016): 5999–6003. http://dx.doi.org/10.1039/c6gc02285e.

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33

Vernekar, Dnyanesh, Satyajit Ratha, Chandrashekhar Rode, and Dinesh Jagadeesan. "Efficient bifunctional reactivity of K-doped CrO(OH) nanosheets: exploiting the combined role of Cr(iii) and surface –OH groups in tandem catalysis." Catalysis Science & Technology 9, no. 5 (2019): 1154–64. http://dx.doi.org/10.1039/c8cy02345j.

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34

Li, Zhao, Teng He, Lin Liu, Weidong Chen, Miao Zhang, Guotao Wu, and Ping Chen. "Covalent triazine framework supported non-noble metal nanoparticles with superior activity for catalytic hydrolysis of ammonia borane: from mechanistic study to catalyst design." Chemical Science 8, no. 1 (2017): 781–88. http://dx.doi.org/10.1039/c6sc02456d.

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35

Ayare, Pooja, Shawn Gregory, Typher Yom, Mark D. Losego, and Aaron Vannucci. "Using Atomic Layer Deposition (ALD) to Immobilize Molecular Catalysts on Solid Powder Supports." ECS Meeting Abstracts MA2022-02, no. 31 (October 9, 2022): 1151. http://dx.doi.org/10.1149/ma2022-02311151mtgabs.

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Анотація:
While homogeneous molecular catalysts are valued for their high reaction specificity, they are not as easily recoverable at industrial scales as heterogeneous catalyst powders that can be rapidly separated from the reaction solution. Here, we will discuss a new approach using atomic layer deposition (ALD) to immobilize molecular catalysts onto heterogeneous powder supports to achieve this combination of selectivity and recoverability. In this presentation, we demonstrate applicability using a non-noble metal (nickel) molecular catalyst to do Suzuki carbon-carbon cross-coupling reactions. Due to extremely short catalyst lifetimes caused by dimerization, this catalyst exhibits limited catalytic reactivity under homogeneous conditions. However, when heterogenized and immobilized, product yields of over 90% can be achieved in aqueous conditions, and the catalytic activity is preserved through over five hundred recovery and wash cycles. Following this work, we will also report on how modification of the ALD surface chemistry and number of ALD cycles affect catalytic performance.
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36

Hu, Rui, Pengfei Yang, Yongning Pan, Yunpeng Li, Yufei He, Junting Feng, and Dianqing Li. "Synthesis of a highly dispersed CuO catalyst on CoAl-HT for the epoxidation of styrene." Dalton Trans. 46, no. 39 (2017): 13463–71. http://dx.doi.org/10.1039/c7dt02247f.

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37

Rodríguez-García, Bárbara, Álvaro Reyes-Carmona, Ignacio Jiménez-Morales, Marta Blasco-Ahicart, Sara Cavaliere, Marc Dupont, Deborah Jones, Jacques Rozière, José Ramón Galán-Mascarós, and Frédéric Jaouen. "Cobalt hexacyanoferrate supported on Sb-doped SnO2 as a non-noble catalyst for oxygen evolution in acidic medium." Sustainable Energy & Fuels 2, no. 3 (2018): 589–97. http://dx.doi.org/10.1039/c7se00512a.

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38

Liang, Song, Zhi-Da Wang, Zhong-Feng Guo, Xin-Yu Chen, Si-Qi Li, Bing-Di Wang, Guo-Long Lu, Hang Sun, Zhen-Ning Liu, and Hong-Ying Zang. "N-Doped porous biocarbon materials derived from soya peptone as efficient electrocatalysts for the ORR." New Journal of Chemistry 45, no. 8 (2021): 3947–53. http://dx.doi.org/10.1039/d0nj06080a.

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39

Xiao, Peng, Mahasin Alam Sk, Larissa Thia, Xiaoming Ge, Rern Jern Lim, Jing-Yuan Wang, Kok Hwa Lim, and Xin Wang. "Molybdenum phosphide as an efficient electrocatalyst for the hydrogen evolution reaction." Energy Environ. Sci. 7, no. 8 (2014): 2624–29. http://dx.doi.org/10.1039/c4ee00957f.

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40

Liang, Jin-Xia, Xiao-Feng Yang, Aiqin Wang, Tao Zhang, and Jun Li. "Theoretical investigations of non-noble metal single-atom catalysis: Ni1/FeOx for CO oxidation." Catalysis Science & Technology 6, no. 18 (2016): 6886–92. http://dx.doi.org/10.1039/c6cy00672h.

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41

Tritton, Daniel Nnaemaka, Govardhana Babu Bodedla, Geliang Tang, Jianzhang Zhao, Chak-Shing Kwan, Ken Cham-Fai Leung, Wai-Yeung Wong, and Xunjin Zhu. "Iridium motif linked porphyrins for efficient light-driven hydrogen evolution via triplet state stabilization of porphyrin." Journal of Materials Chemistry A 8, no. 6 (2020): 3005–10. http://dx.doi.org/10.1039/c9ta12492f.

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42

Seethapathy, Vivek, Preethi Sudarsan, Anurag Kumar Pandey, Arunkumar Pandiyan, T. H. Vignesh Kumar, Kannan Sanjeevi, Ashok K. Sundramoorthy, and Suresh Babu Krishna Moorthy. "Synergistic effect of bimetallic Cu:Ni nanoparticles for the efficient catalytic conversion of 4-nitrophenol." New Journal of Chemistry 43, no. 7 (2019): 3180–87. http://dx.doi.org/10.1039/c8nj05649h.

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43

Huang, Haigen, Xueguang Wang, Xu Li, Chenju Chen, Xiujing Zou, Weizhong Ding, and Xionggang Lu. "Highly chemoselective reduction of nitroarenes over non-noble metal nickel-molybdenum oxide catalysts." Green Chemistry 19, no. 3 (2017): 809–15. http://dx.doi.org/10.1039/c6gc03141b.

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44

Li, Song, Wenzhi Li, Qi Zhang, Riyang Shu, Huizhen Wang, Haosheng Xin, and Longlong Ma. "Lignin-first depolymerization of native corn stover with an unsupported MoS2 catalyst." RSC Advances 8, no. 3 (2018): 1361–70. http://dx.doi.org/10.1039/c7ra11947j.

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45

Huang, Haigen, Xueguang Wang, Yao Sheng, Chenju Chen, Xiujing Zou, Xingfu Shang, and Xionggang Lu. "Nitrogen-doped graphene-activated metallic nanoparticle-incorporated ordered mesoporous carbon nanocomposites for the hydrogenation of nitroarenes." RSC Advances 8, no. 16 (2018): 8898–909. http://dx.doi.org/10.1039/c8ra00761f.

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46

Karanwal, Neha, Deepak Verma, Paresh Butolia, Seung Min Kim, and Jaehoon Kim. "One-pot direct conversion of levulinic acid into high-yield valeric acid over a highly stable bimetallic Nb-Cu/Zr-doped porous silica catalyst." Green Chemistry 22, no. 3 (2020): 766–87. http://dx.doi.org/10.1039/c9gc03516h.

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47

Cui, Zheng, Hang Chu, Shangpeng Gao, Yu Pei, Jin Ji, Yuancai Ge, Pei Dong, Pulickel M. Ajayan, Jianfeng Shen, and Mingxin Ye. "Large-scale controlled synthesis of porous two-dimensional nanosheets for the hydrogen evolution reaction through a chemical pathway." Nanoscale 10, no. 13 (2018): 6168–76. http://dx.doi.org/10.1039/c8nr01182f.

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48

Solanki, Bhanupratap Singh, and Chandrashekhar V. Rode. "Selective hydrogenation of 5-HMF to 2,5-DMF over a magnetically recoverable non-noble metal catalyst." Green Chemistry 21, no. 23 (2019): 6390–406. http://dx.doi.org/10.1039/c9gc03091c.

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49

Yamanaka, Nobutaka, and Shogo Shimazu. "Selective Hydrogenation Properties of Ni-Based Bimetallic Catalysts." Eng 3, no. 1 (January 11, 2022): 60–77. http://dx.doi.org/10.3390/eng3010006.

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Анотація:
Metallic Ni shows high activity for a variety of hydrogenation reactions due to its intrinsically high capability for H2 activation, but it suffers from low chemoselectivity for target products when two or more reactive functional groups are present on one molecule. Modification by other metals changes the geometric and electronic structures of the monometallic Ni catalyst, providing an opportunity to design Ni-based bimetallic catalysts with improved activity, chemoselectivity, and durability. In this review, the hydrogenation properties of these catalysts are described starting from the typical methods of preparing Ni-based bimetallic nanoparticles. In most cases, the reasons for the enhanced catalysis are discussed based on the geometric and electronic effects. This review provides new insights into the development of more efficient and well-structured non-noble metal-based bimetallic catalytic systems for chemoselective hydrogenation reactions.
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50

Fang, Ruiqi, Rafael Luque, and Yingwei Li. "Efficient one-pot fructose to DFF conversion using sulfonated magnetically separable MOF-derived Fe3O4 (111) catalysts." Green Chemistry 19, no. 3 (2017): 647–55. http://dx.doi.org/10.1039/c6gc02018f.

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