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Artículos de revistas sobre el tema "Phosphure de nickel"

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Publicado: 25 de mayo de 2024

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1

Deliy, Irina, Ivan Shamanaev, Pavel Aleksandrov, Evgeny Gerasimov, Vera Pakharukova, Evgeny Kodenev, Ilya Yakovlev, Olga Lapina y Galina Bukhtiyarova. "Support Effect on the Performance of Ni2P Catalysts in the Hydrodeoxygenation of Methyl Palmitate". Catalysts 8, n.º 11 (3 de noviembre de 2018): 515. http://dx.doi.org/10.3390/catal8110515.

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The effect of support nature, SiO2 and γ-Al2O3, on physicochemical and catalytic properties of nickel phosphide catalysts in methyl palmitate hydrodeoxygenation (HDO) has been considered. Firstly, alumina-supported nickel phosphide catalysts prepared by temperature-programmed reduction method starting from different precursors (phosphate–Ni(NO3)2 and (NH4)2HPO4 or phosphite–Ni(OH)2 and H3PO3) were compared using elemental analysis, N2 physisorption, H2-TPR, XRD, TEM, NH3-TPD, 27Al and 31P MAS NMR techniques and catalytic experiments. The mixture of nickel phosphide phases was produced from phosphate precursor on alumina while using of phosphite precursor provides Ni2P formation with the higher activity in methyl palmitate HDO. Besides, the comparative study of the performances of Ni2P/SiO2 and Ni2P/Al2O3 catalysts demonstrates the apparent superiority of alumina-supported Ni2P in the methyl palmitate hydrodeoxygenation. Considering the tentative scheme of methyl palmitate transformation, we proposed that cooperation of Ni2P and acid sites on the surface of alumina provides the enhanced activity of alumina-supported Ni2P through the acceleration of acid-catalysed hydrolysis.
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2

Cho, Hyungjin, Nohyun Lee y Byung Hyo Kim. "Synthesis of Highly Monodisperse Nickel and Nickel Phosphide Nanoparticles". Nanomaterials 12, n.º 18 (14 de septiembre de 2022): 3198. http://dx.doi.org/10.3390/nano12183198.

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Nickel and nickel phosphide nanoparticles are highly useful in various fields, owing to their catalytic and magnetic properties. Although several synthetic protocols to produce nickel and nickel phosphide nanoparticles have been previously proposed, controllable synthesis of nanoparticles using these methods is challenging. Herein, we synthesized highly monodisperse nickel and nickel phosphide nanoparticles via thermal decomposition of nickel–oleylamine–phosphine complexes in organic solvents. The size and composition of the nickel and nickel phosphide nanoparticles were easily controlled by changing the aging temperature, precursor concentration, and phosphine surfactant type. Large-sized monodisperse nickel nanoparticles obtained using our method were successfully applied for the purification of histidine-tagged proteins.
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3

Chen, Hai Chao, Sipeng Jiang, Binghui Xu, Chenghao Huang, Yuzhen Hu, Yanliang Qin, Maoxia He y Haijie Cao. "Sea-urchin-like nickel–cobalt phosphide/phosphate composites as advanced battery materials for hybrid supercapacitors". Journal of Materials Chemistry A 7, n.º 11 (2019): 6241–49. http://dx.doi.org/10.1039/c8ta11189h.

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4

Ma, Min, Danni Liu, Shuai Hao, Rongmei Kong, Gu Du, Abdullah M. Asiri, Yadong Yao y Xuping Sun. "A nickel–borate–phosphate nanoarray for efficient and durable water oxidation under benign conditions". Inorganic Chemistry Frontiers 4, n.º 5 (2017): 840–44. http://dx.doi.org/10.1039/c6qi00594b.

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A nickel–borate–phosphate nanoarray (Ni–Bi–Pi/CC) topotactically converted from a nickel phosphide nanoarray (Ni2P/CC) acts as a durable catalyst electrode for water oxidation needing an overpotential of 440 mV to drive 10 mA cm−2 in 0.1 M K–Bi (pH: 9.2).
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5

Jackson, WR, CG Lovel, P. Perlmutter y AJ Smallridge. "The Stereochemistry of Organometallic Compounds. XXXI. Hydrocyanation of Alkynols". Australian Journal of Chemistry 41, n.º 7 (1988): 1099. http://dx.doi.org/10.1071/ch9881099.

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The regioselectivity of hydrocyanation of a range of alkynols using nickel-based catalyst systems involving either triphenyl phosphite or α,α′-bis(diphenylphosphino)-o-xylene (phmep) has been investigated. The regioselectivity of the hydrocyanations involving the phosphine catalyst reflected dominant steric effects whereas results from the phosphite catalyst system showed some evidence for chelation control. Yields of nitriles from reactions based on the phosphite system were variable, whereas moderate to good yields of distilled products could be obtained consistently by using the phosphine -based system. An explanation for this variation in yield is proposed.
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6

Sataev, Malik, Shayzada Koshkarbaeva, Kalamkas Amanbaeva, Perizat Abdurazova, Yerkebulan Raiymbekov y Ramshat Abzhalov. "Combined method of nickel plating of cotton fabrics". Revista de Chimie 71, n.º 12 (7 de enero de 2021): 76–84. http://dx.doi.org/10.37358/rc.20.12.8388.

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To activate the surface of cotton fabrics before chemical nickel plating, it is proposed to use physical and chemical processes occurring in thin layers of solutions of copper (II) chloride under the influence of electromagnetic solar rays of the visible spectrum. It is shown that cellulose, which is the main component of the fabric, undergoes photo-oxidation in the presence of copper (II) chloride. As a result of this interaction, well-bonded copper monochloride is formed. When further processing of the fabric with phosphine gas, copper monochloride is transformed into copper and copper phosphide. Copper phosphide is a catalyst for the chemical nickel plating process. This makes it possible to obtain an electrically conductive nickel-phosphorus coating on the surface of the fabric in conventional electrolytes of chemical nickel plating. It is also found that when screening individual sections, the processes leading to the formation of copper monochloride do not occur. This allows selective metallization of the fabric.
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7

Liu, Xuguang, Lei Xu y Baoquan Zhang. "Essential elucidation for preparation of supported nickel phosphide upon nickel phosphate precursor". Journal of Solid State Chemistry 212 (abril de 2014): 13–22. http://dx.doi.org/10.1016/j.jssc.2014.01.009.

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8

Jung, Chan Su, Kidong Park, Yeron Lee, In Hye Kwak, Ik Seon Kwon, Jundong Kim, Jaemin Seo, Jae-Pyoung Ahn y Jeunghee Park. "Nickel phosphide polymorphs with an active (001) surface as excellent catalysts for water splitting". CrystEngComm 21, n.º 7 (2019): 1143–49. http://dx.doi.org/10.1039/c8ce01884g.

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We report the temperature-controlled synthesis of two nickel phosphide polymorphs, Ni2P and Ni5P4, by phosphorization of Ni foil or foams using phosphine gas, and their excellent catalytic activity toward hydrogen evolution reaction.
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9

Kessler, Julie A. y Vlad M. Iluc. "NI(ii) phosphine and phosphide complexes supported by a PNP-pyrrole pincer ligand". Dalton Transactions 46, n.º 36 (2017): 12125–31. http://dx.doi.org/10.1039/c7dt02784b.

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10

Kampmann, Sven S., Nikki Y. T. Man, Allan J. McKinley, George A. Koutsantonis y Scott G. Stewart. "Exploring the Catalytic Reactivity of Nickel Phosphine–Phosphite Complexes". Australian Journal of Chemistry 68, n.º 12 (2015): 1842. http://dx.doi.org/10.1071/ch15459.

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In this study, we present an investigation into various nickel phosphite and phosphite–phosphine complexes for use in the Mizoroki–Heck and Suzuki–Miyaura cross-coupling reactions and the ammonia arylation reaction. In these coupling reactions, it was discovered that the Ni[P(OEt)3]4, (dppf)Ni[P(OPh)3]2, and (binap)Ni[P(OPh)3]2 catalysts were the most effective. In addition, an optimisation process for these catalytic systems as well as functional group compatibility are discussed.
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11

Azaman, M. A. I., M. F. Raihan y H. F. M. Zaid. "Synthesis of Nickel Phosphate Using Self Templated Method". Journal of Physics: Conference Series 2705, n.º 1 (1 de febrero de 2024): 012010. http://dx.doi.org/10.1088/1742-6596/2705/1/012010.

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Abstract Nickel phosphate has diverse applications, such as in glucose sensors, catalysts, and supercapacitors. Different synthesis methods affect its structure and properties, characterized by Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD) analysis. Metal phosphates have high ion conductivity, chemical stability, and unique 1D nanostructures. Self-templating techniques, like templating against colloidal particles, create hollow 1D metal phosphate structures, determined by the template size. Materials including triethyl phosphate and ethanol, were used in a self templated method to synthesize different forms of nickel phosphate with varying triethyl phosphate volumes, resulting in products labelled as nickel phosphate-500, nickel phosphate-800, and nickel phosphate-1000. The observation under SEM showed that microflower structures are formed while the XRD analysis revealed that the nickel phosphate material had an amorphous structure with randomly arranged particles, evident from the single broad peak in the XRD patterns. The current response showed that nickel phosphate-500 exhibited the highest reading with the value of 0.2 mA compared to the other two nickel phosphates.
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12

Celen, Burak, Melik Bugra Ozcelik, Furkan Metin Turgut, Cisel Aras, Thyagesh Sivaraman, Yash Kotak, Christian Geisbauer y Hans-Georg Schweiger. "Calendar ageing modelling using machine learning: an experimental investigation on lithium ion battery chemistries". Open Research Europe 2 (12 de agosto de 2022): 96. http://dx.doi.org/10.12688/openreseurope.14745.1.

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Background: The phenomenon of calendar ageing continues to have an impact on battery systems worldwide by causing them to have undesirable operation life and performance. Predicting the degradation in the capacity can identify whether this phenomenon is occurring for a cell and pave the way for placing mechanisms that can circumvent this behaviour. Methods: In this study, the machine learning algorithms, Extreme Gradient Boosting (XGBoost) and artificial neural network (ANN) have been used to predict the calendar ageing data belonging to six types of cell chemistries namely, Lithium Cobalt Oxide, Lithium Iron Phosphate, Lithium Manganese Oxide, Lithium Titanium Oxide, Nickle Cobalt Aluminum Oxide and Nickle Manganese Cobalt Oxide. Results: Prediction results with overall Mean Absolute Percentage Error of 0.0126 have been obtained for XGBoost algorithm. Among these results, Nickle Cobalt Aluminum Oxide and Nickle Manganese Cobalt Oxide type cell chemistries stand out with their mean absolute percentage errors of 0.0035 and 0.0057 respectively. Also, algorithm fitting performance is relatively better for these chemistries at 100% state of charge and 60°C temperature compared to ANN results. ANN algorithm predicts with mean absolute error of approximately 0.0472 overall and 0.0238 and 0.03825 for Nickle Cobalt Aluminum Oxide and Nickle Manganese Cobalt Oxide. The fitting performance of ANN for Nickle Manganese Cobalt Oxide at 100% state of charge and 60°C temperature is especially poor compared to XGBoost. Conclusions: For an electric vehicle battery calendar ageing prediction application, XGBoost can establish itself as the primary choice more easily compared to ANN. The reason is XGBoost’s error rates and fitting performance are more usable for such application especially for Nickel Cobalt Aluminum Oxide and Nickel Manganese Cobalt Oxide chemistries, which are amongst the most demanded cell chemistries for electric vehicle battery packs.
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13

Celen, Burak, Melik Bugra Ozcelik, Furkan Metin Turgut, Cisel Aras, Thyagesh Sivaraman, Yash Kotak, Christian Geisbauer y Hans-Georg Schweiger. "Calendar ageing modelling using machine learning: an experimental investigation on lithium ion battery chemistries". Open Research Europe 2 (22 de febrero de 2023): 96. http://dx.doi.org/10.12688/openreseurope.14745.2.

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Background: The phenomenon of calendar ageing continues to have an impact on battery systems worldwide by causing them to have undesirable operation life and performance. Predicting the degradation in the capacity can identify whether this phenomenon is occurring for a cell and pave the way for placing mechanisms that can circumvent this behaviour. Methods: In this study, the machine learning algorithms, Extreme Gradient Boosting (XGBoost) and artificial neural network (ANN) have been used to predict the calendar ageing data belonging to six types of cell chemistries namely, Lithium Cobalt Oxide, Lithium Iron Phosphate, Lithium Manganese Oxide, Lithium Titanium Oxide, Nickle Cobalt Aluminum Oxide and Nickle Manganese Cobalt Oxide. Results: Prediction results with overall Mean Absolute Percentage Error of 0.0126 have been obtained for XGBoost algorithm. Among these results, Nickle Cobalt Aluminum Oxide and Nickle Manganese Cobalt Oxide type cell chemistries stand out with their mean absolute percentage errors of 0.0035 and 0.0057 respectively. Also, algorithm fitting performance is relatively better for these chemistries at 100% state of charge and 60°C temperature compared to ANN results. ANN algorithm predicts with mean absolute error of approximately 0.0472 overall and 0.0238 and 0.03825 for Nickle Cobalt Aluminum Oxide and Nickle Manganese Cobalt Oxide. The fitting performance of ANN for Nickle Manganese Cobalt Oxide at 100% state of charge and 60°C temperature is especially poor compared to XGBoost. Conclusions: For an electric vehicle battery calendar ageing prediction application, XGBoost can establish itself as the primary choice more easily compared to ANN. The reason is XGBoost’s error rates and fitting performance are more usable for such application especially for Nickel Cobalt Aluminum Oxide and Nickel Manganese Cobalt Oxide chemistries, which are amongst the most demanded cell chemistries for electric vehicle battery packs.
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14

Yamamoto, Takuji, Yuichiro Yoshida, Shogo Taguchi, Naoki Fukumuro, Shinji Yae, Kazuhiro Itoh y Kouji Maeda. "Recovery of Phosphorus from Waste Solution of Electroless Nickel-Phosphorus Plating". MATEC Web of Conferences 333 (2021): 11010. http://dx.doi.org/10.1051/matecconf/202133311010.

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We attempted to recover phosphorus species from a waste plating solution of electroless nickel-phosphorus plating. With the aim of increasing the recovery yield by oxidizing phosphite to phosphate efficiently, we examined ozonation of a model plating solution by supplying ozonecontaining oxygen gas to the solution employing an aerated mixing vessel. As a result of the measurements of the transient changes in the concentrations of the phosphorus species and dissolved ozone in the solution, we confirmed the effect of the organic additives contained in the plating solution on the ozonation efficiency. Calcium chloride was subsequently added to the ozone-treated solution to precipitate the phosphate as calcium hydrogen phosphate, which was poorly soluble to water. At this moment, the recovery yield of the phosphorus from the model waste plating solution was greater than 86%.
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15

Yamamoto, Takuji, Yuichiro Yoshida, Shogo Taguchi, Naoki Fukumuro, Shinji Yae, Kazuhiro Itoh y Kouji Maeda. "Recovery of Phosphorus from Waste Solution of Electroless Nickel-Phosphorus Plating". MATEC Web of Conferences 333 (2021): 11010. http://dx.doi.org/10.1051/matecconf/202133311010.

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We attempted to recover phosphorus species from a waste plating solution of electroless nickel-phosphorus plating. With the aim of increasing the recovery yield by oxidizing phosphite to phosphate efficiently, we examined ozonation of a model plating solution by supplying ozonecontaining oxygen gas to the solution employing an aerated mixing vessel. As a result of the measurements of the transient changes in the concentrations of the phosphorus species and dissolved ozone in the solution, we confirmed the effect of the organic additives contained in the plating solution on the ozonation efficiency. Calcium chloride was subsequently added to the ozone-treated solution to precipitate the phosphate as calcium hydrogen phosphate, which was poorly soluble to water. At this moment, the recovery yield of the phosphorus from the model waste plating solution was greater than 86%.
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16

Zhang, Xiaolong, Jiemei Wang, Yanwei Sui, Fuxiang Wei, Jiqiu Qi, Qingkun Meng, Yezeng He y Dongdong Zhuang. "Hierarchical Nickel–Cobalt Phosphide/Phosphate/Carbon Nanosheets for High-Performance Supercapacitors". ACS Applied Nano Materials 3, n.º 12 (4 de diciembre de 2020): 11945–54. http://dx.doi.org/10.1021/acsanm.0c02507.

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17

Hu, Cun, Chao Lv, Shuai Liu, Yan Shi, Jiangfeng Song, Zhi Zhang, Jinguang Cai y Akira Watanabe. "Nickel Phosphide Electrocatalysts for Hydrogen Evolution Reaction". Catalysts 10, n.º 2 (5 de febrero de 2020): 188. http://dx.doi.org/10.3390/catal10020188.

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The production of hydrogen through electrochemical water splitting driven by clean energy becomes a sustainable route for utilization of hydrogen energy, while an efficient hydrogen evolution reaction (HER) electrocatalyst is required to achieve a high energy conversion efficiency. Nickel phosphides have been widely explored for electrocatalytic HER due to their unique electronic properties, efficient electrocatalytic performance, and a superior anti-corrosion feature. However, the HER activities of nickel phosphide electrocatalysts are still low for practical applications in electrolyzers, and further studies are necessary. Therefore, at the current stage, a specific comprehensive review is necessary to focus on the progresses of the nickel phosphide electrocatalysts. This review focuses on the developments of preparation approaches of nickel phosphides for HER, including a mechanism of HER, properties of nickel phosphides, and preparation and electrocatalytic HER performances of nickel phosphides. The progresses of the preparation and HER activities of the nickel phosphide electrocatalysts are mainly discussed by classification of the preparation method. The comparative surveys of their HER activities are made in terms of experimental metrics of overpotential at a certain current density and Tafel slope together with the preparation method. The remaining challenges and perspectives of the future development of nickel phosphide electrocatalysts for HER are also proposed.
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18

Li, Cong, Xuanhao Mei, Frank Leung-Yuk Lam y Xijun Hu. "Hybridizing amorphous nickel cobalt phosphate and nickel phosphide as an efficient bifunctional nanocatalyst towards overall water splitting". Catalysis Today 358 (diciembre de 2020): 215–20. http://dx.doi.org/10.1016/j.cattod.2020.02.031.

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19

Menezes, Prashanth W., Chakadola Panda, Stefan Loos, Florian Bunschei-Bruns, Carsten Walter, Michael Schwarze, Xiaohui Deng, Holger Dau y Matthias Driess. "A structurally versatile nickel phosphite acting as a robust bifunctional electrocatalyst for overall water splitting". Energy & Environmental Science 11, n.º 5 (2018): 1287–98. http://dx.doi.org/10.1039/c7ee03619a.

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The mechanistically distinct and synergistic role of phosphite anions in hydrogen evolution and nickel cations in oxygen evolution have been uncovered for active and durable overall water splitting catalysis in nickel phosphite.
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20

Li, Run Fu, Hua Li, Hui Ying Chen, Jian Xin Xia y Chun Lin Long. "A Facile In Situ Synthesis of Carbon Supported Nickel Phosphide (Ni5P4@C) and Application as Hydrogen Oxidation Reaction Catalyst in Alkaline Electrolyte". Key Engineering Materials 727 (enero de 2017): 653–56. http://dx.doi.org/10.4028/www.scientific.net/kem.727.653.

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Monodisperse nickel phosphide (Ni5P4) nanoparticles supported on carbon (Ni5P4@C) were in situ synthesized by one step solution-phase route, in which the mixture of trioctyloxide (TOPO) and trioctylphosphine (TOP) was used as solvent, capping agent and phosphor source. Ni5P4nanocrystals were in situ coupled by active carbon simply adding the carbon to the reaction solution. The as-prepared Pt-free Ni5P4 nanocrystals exhibit the enhanced electrocatalytic activity toward hydrogen oxidation reaction (HOR) compared to pure commercial Ni nanoparticles. Therefore, the obtained Ni5P4@C nanocatalyst appears to be promising non precious metal electrocatalysts for HOR.
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21

Ping, He Mei, Yuan Zhi Chen, De Qian Zeng, Rui Xu, Hui Zhang Guo, Lai Sen Wang y Dong Liang Peng. "Preparation of Gold-Nickel Phosphide Core-Shell Nanoparticles via a Facile Solution Method". Applied Mechanics and Materials 464 (noviembre de 2013): 64–68. http://dx.doi.org/10.4028/www.scientific.net/amm.464.64.

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Core-shell nanomaterials have been one of the most attracting research targets in the field of nanoscience and technology due to the multiple functionalities contributed from different components. In this paper, we report a facile solution synthetic method for the preparation of gold-nickel phosphide core-shell nanoparticles that have a near-spherical morphology and a size of ~20 nm. Transmission electron microscopy along with energy dispersive X-ray spectroscopy analyses reveals a core-shell structure consisting of gold core and nickel phosphide shell. The optical absorption data show that the surface plasmon resonance band of gold in the visible range is greatly decreased by coating nickel phosphide shell. The result of magnetic measurement reveals that the as-prepared core-shell nanoparticles basically exhibit paramagnetic characteristics. The obtained gold-nickel phosphide core-shell nanoparticles can be applied in application fields such as catalysis.
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22

Guerra-López, J., A. Gómez, R. Pomés y R. González. "X-ray powder diffraction data for ammonium nickel phosphate monohydrate". Powder Diffraction 10, n.º 3 (septiembre de 1995): 152–53. http://dx.doi.org/10.1017/s0885715600014627.

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Ammonium nickel phosphate monohydrate (NH4NiPO4·H2O) crystal data were obtained by X-ray powder diffraction. Ammonium nickel phosphate monohydrate is orthorhombic with unit-cell parameters a = 5.566 (1) Å, b = 8.760 (2) Å, and c = 4.742 (1) Å.
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23

Liu, Xing, Lanhua Zhao, Haixia Wang, Hua Lai, Gang Peng, Junhua Li, Zhengji Yi y Kang Chen. "Visible-light-driven H2production and decomposition of 4-nitrophenol over nickel phosphides". RSC Advances 8, n.º 60 (2018): 34259–65. http://dx.doi.org/10.1039/c8ra06770h.

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Amorphous nickel phosphide (Ni2P) was synthesized by a simple precipitation method. The nickel phosphide was used to produce H2from water with Eosin Y as sensitizer and degrade 4-nitrophenol under visible light illumination.
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24

Jones, Kieran D., Dennis J. Power, Donald Bierer, Kersten M. Gericke y Scott G. Stewart. "Nickel Phosphite/Phosphine-Catalyzed C–S Cross-Coupling of Aryl Chlorides and Thiols". Organic Letters 20, n.º 1 (19 de diciembre de 2017): 208–11. http://dx.doi.org/10.1021/acs.orglett.7b03560.

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25

Wang, Xiuli y Qiuming Gao. "Efficient phosphors based on organic dyes encapsulated in nanoporous nickel phosphate VSB-1". Journal of Luminescence 132, n.º 2 (febrero de 2012): 439–42. http://dx.doi.org/10.1016/j.jlumin.2011.09.028.

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26

Falk, Anna, Alberto Cavalieri, Gary S. Nichol, Dieter Vogt y Hans-Günther Schmalz. "Enantioselective Nickel-Catalyzed Hydrocyanation using Chiral Phosphine-Phosphite Ligands: Recent Improvements and Insights". Advanced Synthesis & Catalysis 357, n.º 14-15 (12 de octubre de 2015): 3317–20. http://dx.doi.org/10.1002/adsc.201500644.

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27

Pan, Yuan, Yunqi Liu y Chenguang Liu. "An efficient method for the synthesis of nickel phosphide nanocrystals via thermal decomposition of single-source precursors". RSC Advances 5, n.º 16 (2015): 11952–59. http://dx.doi.org/10.1039/c5ra00117j.

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We report an efficient method for the synthesis of nickel phosphide NCs for the first time. The size of Ni2P NCs can be controlled by changing reaction temperature and OAm quantity. The phase of nickel phosphide NCs can be controlled by increasing reaction time.
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28

Wang, Yin, Matthew L. Marrocco y Mark Trimmer. "5602228 Nickel phosphate catalysts". Journal of Molecular Catalysis A: Chemical 125, n.º 2-3 (noviembre de 1997): 177. http://dx.doi.org/10.1016/s1381-1169(98)80099-x.

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29

Lan, Yingying, Hongyang Zhao, Yan Zong, Xinghua Li, Yong Sun, Juan Feng, Yan Wang, Xinliang Zheng y Yaping Du. "Phosphorization boosts the capacitance of mixed metal nanosheet arrays for high performance supercapacitor electrodes". Nanoscale 10, n.º 25 (2018): 11775–81. http://dx.doi.org/10.1039/c8nr01229f.

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30

He, Xiao-Yun. "Nickel-catalyzed C–P cross-coupling of (het)aryl tosylates with secondary phosphine oxides". Journal of Chemical Research 45, n.º 7-8 (19 de febrero de 2021): 747–52. http://dx.doi.org/10.1177/1747519821994533.

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A novel and convenient approach to the synthesis of various tertiary phosphine oxides via nickel-catalyzed cross-coupling of (het)aromatic tosylates with secondary phosphine oxides is developed. The reaction employs cheap nickel as the catalyst, 1-(2-(di-tert-butylphosphanyl)phenyl)-4-methoxypiperidine (L3) as the ligand, and pyridine as the base. This reaction produces the corresponding (het)aromatic phosphorus compounds in good to high yields. Moreover, four new tertiary phosphine oxides are reported in this process.
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31

Fernandes, Kirlene Salgado, Evandro de Azevedo Alvarenga, Paulo Roberto Gomes Brandão y Vanessa de Freitas Cunha Lins. "Infrared-spectroscopy analysis of zinc phosphate and nickel and manganese modified zinc phosphate coatings on electrogalvanized steel". Rem: Revista Escola de Minas 64, n.º 1 (marzo de 2011): 45–49. http://dx.doi.org/10.1590/s0370-44672011000100005.

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Hopeite-type phosphate coatings in which zinc is partially replaced by other metals like manganese and nickel are of great interest for the automotive and home appliance industries. Such industries use phosphate conversion coatings on galvanized steels in association with cataphoretic electropainting. Zinc phosphates modified with manganese and nickel are isomorphic with the hopeite, and the phase identification using X-ray diffraction is difficult. In this paper, the phosphate coatings are identified using the Fourier transform infrared spectroscopy (FTIR).
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32

Sim, Jun Seok, Wan Sik KIM, Asiya Mohaseen Tamboli, Bong Hyun KIM, Young Han Jung y Chang Hee Kim. "Enhanced Synergistic Effect by Facile Tuning of Nickel Doping on Cobalt Phosphide as Electrochemical Catalysts for Hydrogen Evolution Reaction in Alkaline Water Electrolysis". ECS Meeting Abstracts MA2023-02, n.º 65 (22 de diciembre de 2023): 3159. http://dx.doi.org/10.1149/ma2023-02653159mtgabs.

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The development of efficient and cost-effective electrocatalyst for the hydrogen evolution reaction (HER) is essential for alkaline water electrolysis. Cobalt phosphide (Co2P) is a promising non-noble electrocatalyst material for HER due to its low cost and high stability in alkaline solutions. However, improving the HER performance of Co2P is still challenging due to its catalytic mechanism in which Volmer reaction is the dominated rate-determining step. In this study, we introduced nickel to cobalt phosphide in order to improve its performance as an electrocatalyst because nickel is known to be beneficial for water dissociation (Volmer reaction), while cobalt is beneficial for producing gaseous hydrogen (Heyrovsky or Tafel reaction). This synergistic effect between nickel and cobalt phosphide contributes to enhancing HER performance. Also, it is crucial to find the optimal ratio of nickel and cobalt for maximizing synergistic effect. To facilitate the optimization process, a co-sputtering system was used to fabricate the electrodes. The resulting Ni-doped Co2P showed significantly enhanced HER performance with low overpotential of ~91 mV at 10 mA/cm2 and Tafel slope of ~47 mV/dec compared to pristine Co2P in electrochemical analysis. This enhancement is attributed from the optimized ratio between the sites where water dissociation and adsorbed hydrogen recombination reactions occur. The findings of this study demonstrate that the nickel cobalt phosphide electrode is a promising electrocatalyst for HER in alkaline water electrolysis.
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33

Berhault, Gilles, Pavel Afanasiev, Hermione Loboué, Christophe Geantet, Tivadar Cseri, Christophe Pichon, Catherine Guillot-Deudon y Alain Lafond. "In Situ XRD, XAS, and Magnetic Susceptibility Study of the Reduction of Ammonium Nickel Phosphate NiNH4PO4·H2O into Nickel Phosphide". Inorganic Chemistry 48, n.º 7 (6 de abril de 2009): 2985–92. http://dx.doi.org/10.1021/ic802074k.

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34

Han, Ali, Huanlin Chen, Hanyu Zhang, Zijun Sun y Pingwu Du. "Ternary metal phosphide nanosheets as a highly efficient electrocatalyst for water reduction to hydrogen over a wide pH range from 0 to 14". Journal of Materials Chemistry A 4, n.º 26 (2016): 10195–202. http://dx.doi.org/10.1039/c6ta02297a.

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35

Xiao, Jian, Qiying Lv, Yan Zhang, Zheye Zhang y Shuai Wang. "One-step synthesis of nickel phosphide nanowire array supported on nickel foam with enhanced electrocatalytic water splitting performance". RSC Advances 6, n.º 109 (2016): 107859–64. http://dx.doi.org/10.1039/c6ra20737e.

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One-step synthesis of a nickel phosphide nanowire array on nickel foam, which can be used as a bifunctional catalyst for water splitting and shows an excellent electrocatalytic activity for the hydrogen and oxygen evolution reaction.
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36

Zhang, Jie, Jiarui Chang, Ting Liu, Bula Cao, Yazhou Ding y Xuenian Chen. "Application of POCOP Pincer Nickel Complexes to the Catalytic Hydroboration of Carbon Dioxide". Catalysts 8, n.º 11 (1 de noviembre de 2018): 508. http://dx.doi.org/10.3390/catal8110508.

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The reduction of CO2 is of great importance. In this paper, different types of bis(phosphinite) (POCOP) pincer nickel complexes, [2,6-(R2PO)2C6H3]NiX (R = tBu, iPr, Ph; X = SH, N3, NCS), were applied to the catalytic hydroboration of CO2 with catecholborane (HBcat). It was found that pincer complexes with tBu2P or iPr2P phosphine arms are active catalysts for this reaction in which CO2 was successfully reduced to a methanol derivative (CH3OBcat) with a maximum turnover frequency of 1908 h−1 at room temperature under an atmospheric pressure of CO2. However, complexes with phenyl-substituted phosphine arms failed to catalyze this reaction—the catalysts decomposed under the catalytic conditions. Complexes with iPr2P phosphine arms are more active catalysts compared with the corresponding complexes with tBu2P phosphine arms. For complexes with the same phosphine arms, the catalytic activity follows the series of mercapto complex (X = SH) ≈ azido complex (X = N3) >> isothiocyanato complex (X = NCS). It is believed that all of these catalytic active complexes are catalyst precursors which generate the nickel hydride complex [2,6-(R2PO)2C6H3]NiH in situ, and the nickel hydride complex is the active species to catalyze this reaction.
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37

Zada, Bakht, Rui Zhu, Bing Wang, Jiao Liu, Jin Deng y Yao Fu. "A practical and concise homogeneous nickel catalyst for efficient solvent-free synthesis of γ-valerolactone". Green Chemistry 22, n.º 11 (2020): 3427–32. http://dx.doi.org/10.1039/d0gc00763c.

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An inexpensive and readily available nickel-phosphine catalyst is used to efficiently catalyze the reduction of levulinic acid to produce γ-valerolactone and the catalyst cost only needs a few nickel coins (<0.1 $ per kg GVL).
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38

Saghafi Yazdi, Morteza, Mohammad Rezayat y Joan Josep Roa Rovira. "ElectroCatalytic Activity of Nickel Foam with Co, Mo, and Ni Phosphide Nanostructures". Plasma 5, n.º 2 (27 de abril de 2022): 221–32. http://dx.doi.org/10.3390/plasma5020017.

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In this study, the electrocatalytic activity of nickel foam, which is activated by cobalt, molybdenum, and nickel phosphide nanostructures, is prepared by the plasma hydrothermal method for use in the release of hydrogen and oxygen. The morphology and crystallographic structure of the synthesized phosphide specimens were examined by means of scanning electron microscopy, Fourier-transform infrared spectroscopy, and X-ray diffraction. Moreover, the electrolysis activity for these sets of specimens was investigated using the Tafel polarization curve or linear sweep voltammetry, cyclic voltammetry, as well as by means of the electrochemical impedance spectroscopy technique. Preliminary results show that nickel phosphide presents the highest electrocatalytic activity than the other phosphides developed in this research. In this regard, it presents an electrocatalytic activity to release hydrogen and oxygen of around −1.7 and 0.82 mV, which is measured at a current density of 100 mA·cm−2, respectively.
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39

Sawusch, Stefan y Uwe Schilde. "Ligandenaustauschreaktionen von NiCl2 (PPh3)2 mit O(S)⌒N⌒S-Liganden / Ligand Exchange Reactions of NiCl2(PPh3)2 with O(S )⌒ N ⌒ S Ligands". Zeitschrift für Naturforschung B 54, n.º 7 (1 de julio de 1999): 881–86. http://dx.doi.org/10.1515/znb-1999-0710.

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Ligand exchange reactions of NiCl2(PPh3)2 with O (S )⌒N⌒S ligands were studied. Oxidation products of O⌒N⌒S ligands have been characterized and their structures determined: 3-methyl-4H-benzo[b] [ 1,4]thiazin-2-yl-phenylmethanone / 2-methyl-benzo[d] [ 1,3]thiazole (mixed crystal); [2-iminoisopropyl-thiophenolato(2-)](triphenyl-phosphane)-nickel(II); 1 -phenyl-3-methyl-4-(benzoyl-thiobenzoylhydrazono)-pyrazol-5-thione; [ 1 -phenyl-3-methyl- 4-(benzoyl-thiobenzoylhydrazono)-pyrazol-5-thionato](triphenyl-phosphane)-nickel(II).
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40

Amin, Sri Asliza Md, Kasmuin Mohd Zaheruddin, Rahmat Azmi, Shamsul Baharin Jamaludin y R. A. Khairel. "Effect of Different Nickel Content on the Mechanical Properties of Hydroxyapatite-Ni Composites from Coated Powders". Key Engineering Materials 594-595 (diciembre de 2013): 311–15. http://dx.doi.org/10.4028/www.scientific.net/kem.594-595.311.

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HA-Ni composites were fabricated by uniaxial pressing from coated powders, in which HA particles were successfully coated with nickel precursor by the electroless deposition method. The compacted powders sintered at temperature 1200°C for 1h. Decomposition of hydroxyapatite into α-TCP (α tricalcium phosphate) and TTCP (tetracalcium phosphate) were not occured in any different nickel content before and after sintering. The Ni peaks sharply increased with increasing of Ni content indicate that high crystallinity of metal and confirmed the existence of nickel in the composites. Compared with that of pure HA, the fracture strength of HA inproved by almost 200% by adding 1wt% Ni due to the increase of the composites density. The enhancement in mechanical properties of HA-Ni composites was found to decrease with increase of Ni content, which attributed to the size effect of nickel grains and higher porosity percentage of composites.
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41

Henry, Paul F., Mark T. Weller y Robert W. Hughes. "Nickel Phosphate Based Zeotype, RbNiPO4". Inorganic Chemistry 39, n.º 24 (noviembre de 2000): 5420–21. http://dx.doi.org/10.1021/ic000712q.

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42

Abrahams, I. y K. S. Easson. "Structure of lithium nickel phosphate". Acta Crystallographica Section C Crystal Structure Communications 49, n.º 5 (15 de mayo de 1993): 925–26. http://dx.doi.org/10.1107/s0108270192013064.

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43

Jarrett, Penelope S. y Peter J. Sadler. "Nickel(II) bis(phosphine) complexes". Inorganic Chemistry 30, n.º 9 (mayo de 1991): 2098–104. http://dx.doi.org/10.1021/ic00009a028.

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44

Duan, Jingjing, Sheng Chen y Chuan Zhao. "Strained Nickel Phosphide Nanosheet Array". ACS Applied Materials & Interfaces 10, n.º 36 (23 de agosto de 2018): 30029–34. http://dx.doi.org/10.1021/acsami.8b09147.

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45

Ackermann, Lutz, Robert Born, Julia H. Spatz, Andreas Althammer y Christian J. Gschrei. "Air-stable phosphine oxides as preligands for catalytic activation reactions of C-Cl, C-F, and C-H bonds". Pure and Applied Chemistry 78, n.º 2 (1 de enero de 2006): 209–14. http://dx.doi.org/10.1351/pac200678020209.

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Studies on the use of easily accessible heteroatom-substituted secondary phosphine oxides as preligands for cross-coupling reactions are described. These air-stable sterically hindered phosphine oxides allow for efficient palladium-catalyzed Suzuki- and nickel-catalyzed Kumada-coupling reactions using electronically deactivated aryl chlorides. In addition, they enable nickel-catalyzed coupling reactions of magnesium organyls with aryl fluorides at ambient temperature, and ruthenium-catalyzed coupling reactions of aryl chlorides via C-H bond activation. Finally, the application of modular diamino phosphine chlorides as preligands for a variety of transition-metal-catalyzed C-C and C-N bond formation reactions employing electron-rich aryl chlorides is presented.
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46

Falk, Anna, Alberto Cavalieri, Gary S. Nichol, Dieter Vogt y Hans-Guenther Schmalz. "ChemInform Abstract: Enantioselective Nickel-Catalyzed Hydrocyanation Using Chiral Phosphine-Phosphite Ligands: Recent Improvements and Insights." ChemInform 47, n.º 9 (febrero de 2016): no. http://dx.doi.org/10.1002/chin.201609106.

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47

Nakao, Yoshiaki y Tamejiro Hiyama. "Nickel-catalyzed carbocyanation of alkynes". Pure and Applied Chemistry 80, n.º 5 (1 de enero de 2008): 1097–107. http://dx.doi.org/10.1351/pac200880051097.

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Nickel-catalyzed carbocyanation reaction of alkynes is described. Alkynes undergo aryl- and allylcyanation reaction in the presence of nickel-phosphine catalysts to give a wide range of substituted acrylonitriles in highly stereo-, regio-, and chemoselective manners. Lewis acid cocatalysts, such as AlMe3, AlMe2Cl, and BPh3, are found to promote the arylcyanation significantly. The cooperative catalysis of nickel and Lewis acid also allows the carbocyanation reaction using alkenyl and alkyl cyanides.
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48

Golub, N. P., E. O. Golub, A. A. Kozma, A. O. Kuznietsova, A. V. Hurch y Y. M. Herneshii. "RESEARCH OF ACID PROPERTIES OF COMPLEX OXIDE CATALYST 50%Cu3(PO4)2•50%Ni3(PO4)2". Scientific Bulletin of the Uzhhorod University. Series «Chemistry» 48, n.º 2 (23 de mayo de 2023): 108–15. http://dx.doi.org/10.24144/2414-0260.2022.2.108-115.

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Individual orthophosphates of copper (II) and nickel (II) were synthesized and a new method of synthesis was developed, and a new complex catalytic system based on them of the type xCu3(PO4)2×yNi3(PO4)2 - 50%Cu3(PO4)2∙50%Ni3(PO4)2 was obtained, which has the predicted optimal acidic surface properties and the corresponding active centers. The acidic properties of the surface of the obtained individual copper (II) and nickel (II) phosphates and complex copper-nickel phosphate catalytic systems and the distribution of active centers on them were investigated. The peculiarities of the influence of synthesis conditions and temperature on the composition, structure and acidic properties of the surface of the obtained catalysts, as well as the nature and character of the formation of active centers of different strengths, were studied. It is established that calcination of the new synthesized copper-nickel phosphate catalytic system in the studied temperature range (120-700оС) allows not only to carry out complete dehydration of the obtained crystalline hydrate, but also contributes to a gradual change in the value of surface acidity. This leads to the formation on the surface of the synthesized complex copper-nickel phosphate catalytic system 50%Cu3(PO4)2∙50%Ni3(PO4)2 acidic active centers of appropriate strength. The promoting role of nickel ions Nі2+ in the structure of the copper-phosphate catalyst was confirmed and the presence of a synergistic effect of both these phosphates on the value of acidity in the structure of the synthesized complex catalytic system was established. A new active and cheap acidic complex catalyst – 50%Cu3(PO4)2∙50%Ni3(PO4)2, which has the necessary structure, optimal acidic surface properties, and appropriate active centers, has been obtained; therefore, it can be used for research in the chemical industry as an active and efficient catalyst for the partial oxidation of hydrocarbons into valuable products. Keywords: catalysts; heterogeneous catalysis; phosphates; complex oxides; oxidation; n-alkanes; hydrocarbons; ethane; ethylene.
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49

Shahroudi, Ali, Mahsa Esfandiari y Sajjad Habibzadeh. "Nickel sulfide and phosphide electrocatalysts for hydrogen evolution reaction: challenges and future perspectives". RSC Advances 12, n.º 45 (2022): 29440–68. http://dx.doi.org/10.1039/d2ra04897c.

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50

Xia, Liang Yan, Zhi Xiang Xia, Wei Tang, Hong Yan Wang y Meng Xiang Fang. "Hydrogenation of Model Compounds Catalyzed by MCM-41-Supported Nickel Phosphide". Advanced Materials Research 864-867 (diciembre de 2013): 366–72. http://dx.doi.org/10.4028/www.scientific.net/amr.864-867.366.

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MCM-41 supported nickel phosphide (Ni2P/MCM-41) was prepared by temperature-programmed reduction of the corresponding phosphate. The catalyst activity for hydrodeoxygenation (HDO), hydrodearomatization (HDA), hydrodenitrogenation (HDN) and hydrodesulfurization (HDS) was investigated in a fixed bed reactor. O-cresol HDO, 1-methylnaphthalene HDA, quinoline HDN, dibenzothiophene HDS and simultaneous HDO, HDA, HDN, HDS were respectively tested at different temperatures with constant pressure (6.0 MPa), liquid hourly space velocity (3.0 h-1), hydrogen-to-oil volume ratio (600:1). The results indicate that Ni2P /MCM-41 catalyst has great performance on HDO, HDA, HDN, HDS in single model compound reactions. O-cresol and DBT are almost completely transformed at 375°C, while 1-methylnaphthalene and quinoline reach the highest conversion at 300°C. In the simultaneous reactions, quinoline shows higher conversion by competitive adsorption on the catalyst hydrogenation sites, leading to conversion decrease of o-cresol, 1-methylnaphthalene and DBT.
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