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Статті в журналах з теми "Palladium-based"

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Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 19 лютого 2023

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1

Hotta, Hideki, Toshiro Kuji, and Hirohisa Uchida. "Hydride Stability for Palladium and Palladium Based fcc Alloys." Journal of the Japan Institute of Metals 69, no. 4 (2005): 362–67. http://dx.doi.org/10.2320/jinstmet.69.362.

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2

Nicolas, M., H. Raffy, L. Dumoulin, and J. P. Burger. "Absorption of hydrogen in ultrathin palladium and palladium-based alloys." Journal of the Less Common Metals 130 (March 1987): 61–67. http://dx.doi.org/10.1016/0022-5088(87)90087-7.

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3

Denisov, M. "Palladium-based enzyme inhibitors (review)." Perm Scientific Center Journal 14, no. 4 (2021): 6–18. http://dx.doi.org/10.7242/2658-705x/2021.4.1.

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4

Behzadi Pour, Ghobad, Leila Fekri Aval, Mehdi Nasiri Sarvi, Sedigheh Fekri Aval, and Hamed Nazarpour Fard. "Hydrogen sensors: palladium-based electrode." Journal of Materials Science: Materials in Electronics 30, no. 9 (March 28, 2019): 8145–53. http://dx.doi.org/10.1007/s10854-019-01190-7.

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5

Andrés, Román, Ernesto de Jesús, and Juan Carlos Flores. "Catalysts based on palladium dendrimers." New Journal of Chemistry 31, no. 7 (2007): 1161. http://dx.doi.org/10.1039/b615761k.

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6

Rustamova, Ekaterina G., Maria S. Kagirina, and Sergey P. Gubin. "Obtaining ink based on palladium nanoparticles for possible use in printed electronics." Radioelectronics. Nanosystems. Information Technologies. 14, no. 2 (June 30, 2022): 143–50. http://dx.doi.org/10.17725/rensit.2022.14.143.

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Анотація:

The possibility of obtaining conductive ink based on palladium nanoparticles obtained by the polyol method is considered. The composition of the ink is adapted for use in printed electronics. The ink contains 20 mass% palladium, has a viscosity of 17-20 cps and a surface tension of 35-38 N/m. During heat treatment, the specific surface resistance of palladium nanostructures changes from 0.38 to 0.07 Ω. These and other characteristics, such as high stability and good wettability of the substrate, make it possible to use palladium nanoink in printer printing.

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7

Yin, Yanru, Changna Wen, Ning Ma, Baoyan Wang, Lianying Zhang, Hongliang Li, and Peizhi Guo. "Sodium Alginate-Assisted Synthesis of PdAg Bimetallic Nanoparticles and their Enhanced Activity for Electrooxidation of Ethanol." Nano 14, no. 09 (September 2019): 1950120. http://dx.doi.org/10.1142/s1793292019501200.

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Palladium and palladium-silver bimetallic nanocrystals have been synthesized hydrothermally by using environmental-friendly sodium alginate as the stabilizer and reducing agent. The pure palladium nanoparticles were spherical-like possibly due to the principle of the lowest surface energy, however, the formation of bimetallic palladium-silver nanoparticles was much more complicated, which was thinner and more irregular nanostructures than pure palladium nanoparticles. Electrochemical measurements showed that the electrocatalytic activity toward ethanol oxidation was increased first with the increase of silver content in bimetallic nanoparticles, from pure palladium of around 1070[Formula: see text]mA/mg, to PdAg-20 of 1160[Formula: see text]mA/mg and to PdAg-10 of 1750[Formula: see text]mA/mg, and declined greatly at a high content of silver, approximately 279[Formula: see text]mA/mg. Electrochemical stability test showed that PdAg-10 and PdAg-5 were the best and worst among four palladium-based samples, respectively. Based on the experimental data, the formation mechanism of pure palladium and palladium-silver bimetallic nanoparticles and the structure-property relationship of these samples have been discussed.

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8

Hamagami, Junichi, Ryo Araki, Shohei Onimaru, G. Kawamura, and Atsunori Matsuda. "Influence of Catalyst Loading Method on Titania-Based Optical Hydrogen Gas Sensing Properties." Key Engineering Materials 582 (September 2013): 210–13. http://dx.doi.org/10.4028/www.scientific.net/kem.582.210.

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We reported that titania ceramic coating loaded with palladium catalyst worked as an optical hydrogen gas sensor at room temperature. The palladium metal of this sensor worked as a catalyst not only for room-temperature operation but also for high selectivity to hydrogen gas. Precise control of metal/ceramic interface between the titania and the palladium was very important in order to improve the sensor performance such as sensitivity, response time, recovery time. Influence of a difference in palladium-catalyst loading method (photodeposition and sputtering) on the optical hydrogen gas sensing properties for the titania-based sensor was investigated. It was found that the catalytic loading process significantly affected the optical hydrogen characteristics of the titania-based coating.

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9

Cohen, S. M., A. Kakar, T. K. Vaidyanathan, and T. Viswanadhan. "Castability optimization of palladium based alloys." Journal of Prosthetic Dentistry 76, no. 2 (August 1996): 125–31. http://dx.doi.org/10.1016/s0022-3913(96)90295-4.

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10

Lang, Thomas, Ernest Graf, Nathalie Kyritsakas, and Mir Wais Hosseini. "Zinc– and palladium–porphyrin based turnstiles." New J. Chem. 37, no. 1 (2013): 112–18. http://dx.doi.org/10.1039/c2nj40657h.

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11

Kalekar, Ajit M., Kiran Kumar K. Sharma, Meitram N. Luwang, and Geeta K. Sharma. "Catalytic activity of bare and porous palladium nanostructures in the reduction of 4-nitrophenol." RSC Advances 6, no. 14 (2016): 11911–20. http://dx.doi.org/10.1039/c5ra23138h.

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Анотація:

The catalytic activity of bare and porous palladium nanostructures viz. palladium nanoballs (PdNBs) and palladium urchins (Pdurc) synthesized in surfactant based liquid crystalline mesophase have been investigated in the reduction of 4-nitrophenol.

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12

Chawla, Neha, Amir Chamaani, Meer Safa, Marcus Herndon, and Bilal El-Zahab. "Mechanism of Ionic Impedance Growth for Palladium-Containing CNT Electrodes in Lithium-Oxygen Battery Electrodes and its Contribution to Battery Failure." Batteries 5, no. 1 (January 23, 2019): 15. http://dx.doi.org/10.3390/batteries5010015.

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The electrochemical oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) and on CNT (carbon nanotube) cathode with a palladium catalyst, palladium-coated CNT (PC-CNT), and palladium-filled CNT (PF-CNT) are assessed in an ether-based electrolyte solution in order to fabricate a lithium-oxygen battery with high specific energy. The electrochemical properties of the CNT cathodes were studied using electrochemical impedance spectroscopy (EIS). Palladium-filled cathodes displayed better performance as compared to the palladium-coated ones due to the shielding of the catalysts. The mechanism of the improvement was associated to the reduction of the rate of resistances growth in the batteries, especially the ionic resistances in the electrolyte and electrodes. The scanning electron microscopy (SEM) and spectroscopy were used to analyze the products of the reaction that were adsorbed on the electrode surface of the battery, which was fabricated using palladium-coated and palladium-filled CNTs as cathodes and an ether-based electrolyte.

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13

Ndaya, Cynthia Cibaka, Nicolas Javahiraly, and Arnaud Brioude. "Recent Advances in Palladium Nanoparticles-Based Hydrogen Sensors for Leak Detection." Sensors 19, no. 20 (October 16, 2019): 4478. http://dx.doi.org/10.3390/s19204478.

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Along with the development of hydrogen as a sustainable energy carrier, it is imperative to develop very rapid and sensitive hydrogen leaks sensors due to the highly explosive and flammable character of this gas. For this purpose, palladium-based materials are being widely investigated by research teams because of the high affinity between this metal and hydrogen. Furthermore, nanostructured palladium may provide improved sensing performances compared to the use of bulk palladium. This arises from a higher effective surface available for interaction of palladium with the hydrogen gas molecules. Several works taking advantage of palladium nanostructures properties for hydrogen sensing applications have been published. This paper reviews the recent advances reported in the literature in this scope. The electrical and optical detection techniques, most common ones, are investigated and less common techniques such as gasochromic and surface wave acoustic sensors are also addressed. Here, the sensor performances are mostly evaluated by considering their response time and limit of detection.

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14

Steingruber, H. Sebastián, Pamela Mendioroz, María A. Volpe, and Darío C. Gerbino. "Direct Arylation-Based Synthesis of Carbazoles Using an Efficient Palladium Nanocatalyst under Microwave Irradiation." Chemistry Proceedings 3, no. 1 (November 14, 2020): 70. http://dx.doi.org/10.3390/ecsoc-24-08314.

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Herein, an eco-friendly palladium-catalyzed tandem reaction for the one-pot synthesis of carbazoles under microwave irradiation is reported. This approach involves an amination and a direct arylation from available and inexpensive anilines and 1,2-dihaloarenes. For the development of this purpose, a novel recoverable palladium nanocatalyst supported on a green biochar under ligand-free conditions is used. Compared with other existing palladium-based protocols, the present synthetic methodology shows a drastic reduction in reaction times and excellent compatibility with different functional groups, allowing to obtain a small library of carbazoles with high yields and regioselectivity. The novel heterogeneous palladium nanocatalyst can be recycled and reused up to five times without significant loss activity.

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15

Lee, Jeongmin, and Ji Young Chang. "Synthesis of a palladium acetylide-based tubular microporous polymer monolith via a self-template approach: a potential precursor of supported palladium nanoparticles for heterogeneous catalysis." RSC Advances 8, no. 45 (2018): 25277–82. http://dx.doi.org/10.1039/c8ra03275k.

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16

Yurkov, Gleb, Yury Koksharov, Alexander Fionov, Nikolai Taratanov, Vladimir Kolesov, Vladislav Kirillov, Mstislav Makeev, Pavel Mikhalev, Dmitriy Ryzhenko, and Vitaliy Solodilov. "Polymer Nanocomposite Containing Palladium Nanoparticles: Synthesis, Characterization, and Properties." Polymers 14, no. 18 (September 10, 2022): 3795. http://dx.doi.org/10.3390/polym14183795.

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Composite nanomaterials have been prepared through thermal decomposition of palladium diacetate. The composite contains palladium nanoparticles embedded in high-pressure polyethylene. The materials were studied by a number of different physico-chemical methods, such as transmission electron microscopy, X-ray diffraction, X-ray absorption spectroscopy, electron paramagnetic resonance, and EXAFS. The average size of the nanoparticles is 7.0 ± 0.5 nm. It is shown that with the decrease of metal content in the polymer matrix the average size of nanoparticles decreased from 7 to 6 nm, and the coordination number of palladium also decreased from 7 to 5.7. The mean size of palladium particles increases with the growing concentration of palladium content in the matrix. It is shown that the electrophysical properties of the material obtained depend on the filler concentration. The chemical composition of palladium components includes metallic palladium, palladium (III) oxide, and palladium dioxide. All samples have narrow lines (3–5 Oe) with a g factor of around two in the electron paramagnetic resonance (EPR) spectra. It is shown that EPR lines have uneven boarding by saturation lines investigation. The relaxation component properties are different for spectral components. It leads to the spectrum line width depending on the magnetic field value. At first approximation, the EPR spectra can be described as a sum of two Lorentzian function graphs, corresponding to the following two paramagnetic centers: one is on the surface, and one is inside the palladium particles. Some of the experimental characteristics were measured for the first time. The data obtained indicate interesting properties of palladium-based nanocomposites, which will be useful for obtaining products based on these materials.

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17

Yildirim, Selçuk, Bettina Röcker, Nadine Rüegg, and Wolfgang Lohwasser. "Development of Palladium-based Oxygen Scavenger: Optimization of Substrate and Palladium Layer Thickness." Packaging Technology and Science 28, no. 8 (June 1, 2015): 710–18. http://dx.doi.org/10.1002/pts.2134.

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18

Mingming Geng. "Electrochemical characterization of MmNi5-based alloy powder coated with palladium and nickel-palladium." Journal of Alloys and Compounds 215, no. 1-2 (November 1994): 151–53. http://dx.doi.org/10.1016/0925-8388(94)90832-x.

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19

Piche, Laurence, Jean-Christophe Daigle, Gregor Rehse, and Jerome P. Claverie. "Structure-Activity Relationship of Palladium Phosphanesulfonates: Toward Highly Active Palladium-Based Polymerization Catalysts." Chemistry - A European Journal 18, no. 11 (February 13, 2012): 3277–85. http://dx.doi.org/10.1002/chem.201103694.

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20

Isaeva, Leyla E., D. I. Bazhanov, S. S. Kulkov, S. E. Kulkova, and Igor A. Abrikosov. "Influence of Magnetism on Interaction Energy between 3d Impurities and Hydrogen in Palladium Crystal in the Presence of Vacancies." Solid State Phenomena 152-153 (April 2009): 19–24. http://dx.doi.org/10.4028/www.scientific.net/ssp.152-153.19.

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In this paper we have studied from first-principles the effect of magnetism on the hydrogen-metal interaction and the binding properties of palladium with 3d-alloying atoms in the presence of vacancies induced during hydrogenation process. Our first-principles calculations were carried out by means of state of the art ab-initio method based on density functional theory and all-electron PAW-potentials. We have analyzed the changes of the atomic and electronic structures of palladium crystal induced by the presence of substitutional 3d-alloying atoms, interstitial hydrogen and structural defect (palladium vacancy). The obtained results have shown that magnetism can strongly affect the hydrogen-metal interaction in palladium based alloys. We have also demonstrated that the presence of vacancies in the palladium matrix can alter the interaction energy between hydrogen and alloying transition metal atoms.

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21

Zhou, Guohua, Huimin Jiang, Yanfang Zhou, Peilian Liu, Yongmei Jia, and Cui Ye. "Peptide-coated palladium nanoparticle for highly sensitive bioanalysis of trypsin in human urine samples." Nanomaterials and Nanotechnology 8 (January 1, 2018): 184798041882039. http://dx.doi.org/10.1177/1847980418820391.

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In recent years, palladium nanoparticles have been proved as energy acceptor candidates in fluorescence resonance energy transfer-based sensors for analytical and biological purposes. In this article, peptide-coated palladium nanoparticles were prepared using a simple one-step preparation method. The peptide Cys-Ala-Leu-Asn-Asn was used as a ligand, whereas hydrazine hydrate was used as a reductant to obtain water-soluble and stable peptide-coated palladium nanoparticles. Additionally, peptide-coated palladium nanoparticles were functionalized by adding the functional peptide CALNNGGARK(FITC) in combination with Cys-Ala-Leu-Asn-Asn during the preparation process. The prepared functionalized peptide-coated palladium nanoparticles were used for trypsin detection based on the fluorescence resonance energy transfer approach. Under optimized conditions, the proposed method can be used for the detection of trypsin concentrations in the range of approximately 0.2–8-μg/mL with a limit of detection of 0.18-μg/mL. The functionalized peptide-coated palladium nanoparticles were successfully applied for the detection of trypsin in urine samples. Our findings also indicated that peptide-coated palladium nanoparticles can highly quench fluorophores and are suitable for the manufacture of off–on state fluorescent sensors. We anticipated that the peptide-coated palladium nanoparticles proposed in this article will have great potential for the detection of trypsin in urine and other analytical, biological, and clinical applications.

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22

Perić, Tanja S., and Slobodan M. Janković. "Cardiotoxicity of Palladium Compounds / Kardiotoksičnost Jedinjenja Paladijuma." Journal of Medical Biochemistry 32, no. 1 (January 1, 2013): 20–25. http://dx.doi.org/10.2478/v10011-012-0010-5.

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SummaryPrevious studies have shown that palladium has toxic effects on the kidney and liver, leads to deterioration of the general condition of animals, and could cause allergy in animals and humans. Considering the limited data about the influence of palladium on the cardiovascular system, the aim of our study was to evaluate the effects of palladium on the heart from available published data, and to compare the toxicity of inorganic and organic palladium compounds. Relevant studies for our review were identified from PubMed and Scopus databases. The search terms included »palladium «, »palladium compound«, »cardiotoxicity«, »toxicity«, »heart«, »myocardium«, »oxidative stress« and »myocardial enzyme«, as well as combinations of these terms. There were only two published studies with the primary purpose to investigate the effect of palladium on the cardiovascular system, while others registered the side-effects of palladium compounds on the heart. Palladium could cause arrhythmias, a drop in blood pressure, decrease of the heart rate, as well as death of experimental animals. Based on the presented data it seems that palladium does not express significant cardiac toxicity when it is bound in an organic compound. Further investigation of the effects of palladium on the heart is necessary for a clear picture of the nature and extent of its cardiac toxicity.

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23

Vallribera, A., S. Niembro, A. Shafir, and R. Alibes. "Microwave-Based Heck Reaction with Palladium Nanoparticles." Synfacts 2008, no. 11 (October 23, 2008): 1228. http://dx.doi.org/10.1055/s-0028-1083399.

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24

Chen, Aicheng, and Cassandra Ostrom. "Palladium-Based Nanomaterials: Synthesis and Electrochemical Applications." Chemical Reviews 115, no. 21 (September 24, 2015): 11999–2044. http://dx.doi.org/10.1021/acs.chemrev.5b00324.

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25

Barlag, Heike, Lutz Opara, and Harald Züchner. "Hydrogen diffusion in palladium based f.c.c. alloys." Journal of Alloys and Compounds 330-332 (January 2002): 434–37. http://dx.doi.org/10.1016/s0925-8388(01)01459-1.

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26

Niele, Frank G. M., and Roeland J. M. Nolte. "Palladium(II) cage compounds based on diphenylglycoluril." Journal of the American Chemical Society 110, no. 1 (January 1988): 172–77. http://dx.doi.org/10.1021/ja00209a027.

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27

Holler, Stefan, Michael Tüchler, Beate G. Steller, Ferdinand Belaj, Luis F. Veiros, Karl Kirchner, and Nadia C. Mösch-Zanetti. "Thiopyridazine-Based Palladium and Platinum Boratrane Complexes." Inorganic Chemistry 57, no. 12 (June 7, 2018): 6921–31. http://dx.doi.org/10.1021/acs.inorgchem.8b00530.

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28

Leung, Wa-Hung, Lam-Lung Yeung, Wing-Leung Mak, Eddie Y. Chan, Tony C. Lam, Wing-Sze Lee, and Hoi-Lun Kwong. "Palladium-based Kinetic Resolution of Racemic Tosylaziridines." Synlett, no. 10 (2002): 1688–90. http://dx.doi.org/10.1055/s-2002-34221.

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29

Maier, R. R. J., B. J. S. Jones, J. S. Barton, S. McCulloch, T. Allsop, J. D. C. Jones, and I. Bennion. "Fibre optics in palladium-based hydrogen sensing." Journal of Optics A: Pure and Applied Optics 9, no. 6 (May 21, 2007): S45—S59. http://dx.doi.org/10.1088/1464-4258/9/6/s08.

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30

Li, Huanqiao, Qin Xin, Wenzhen Li, Zhenhua Zhou, Luhua Jiang, Shaohua Yang, and Gongquan Sun. "An improved palladium-based DMFCs cathode catalyst." Chemical Communications, no. 23 (2004): 2776. http://dx.doi.org/10.1039/b409539a.

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31

SRIVASTAVA, VIVEK. "Carbene Based Palladium-catalyzed Mizoroki-Heck Reaction." Oriental Journal Of Chemistry 28, no. 4 (December 22, 2012): 1859–63. http://dx.doi.org/10.13005/ojc/280444.

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32

Shu, J., B. P. A. Grandjean, A. Van Neste, and S. Kaliaguine. "Catalytic palladium-based membrane reactors: A review." Canadian Journal of Chemical Engineering 69, no. 5 (October 1991): 1036–60. http://dx.doi.org/10.1002/cjce.5450690503.

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33

Shao, Meijun, Xuekun Xing, and Chung-Chiun Liu. "pH measurements based on a palladium electrode." Electroanalysis 6, no. 3 (March 1994): 245–49. http://dx.doi.org/10.1002/elan.1140060311.

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34

Liao, Fenglin, Tsz Woon Benedict Lo, and Shik Chi Edman Tsang. "Recent Developments in Palladium-Based Bimetallic Catalysts." ChemCatChem 7, no. 14 (June 26, 2015): 1998–2014. http://dx.doi.org/10.1002/cctc.201500245.

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35

Li, Zhong Ping, Yong Guo, Suo Zhu Wu, Shao Min Shuang, and Chuan Dong. "Methane sensor based on palladium/MWNT nanocomposites." Chinese Chemical Letters 20, no. 5 (May 2009): 608–10. http://dx.doi.org/10.1016/j.cclet.2008.12.031.

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36

Goharshadi, Elaheh K., Hossein Azizi-Toupkanloo, and Mahdi Karimi. "Electrical conductivity of water-based palladium nanofluids." Microfluidics and Nanofluidics 18, no. 4 (August 9, 2014): 667–72. http://dx.doi.org/10.1007/s10404-014-1465-0.

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37

Rijnders, M. R., and S. D. Peteves. "Palladium-Based High-Temperature Brazes for Alumina." Advanced Engineering Materials 3, no. 3 (March 2001): 152–57. http://dx.doi.org/10.1002/1527-2648(200103)3:3<152::aid-adem152>3.0.co;2-f.

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38

Ngodwana, Lonwabo, Sritama Bose, Vincent J. Smith, Willem A. L. van Otterlo, and Gareth E. Arnott. "A Bidentate Resorcinarene-Based Palladium Carbene Complex." European Journal of Inorganic Chemistry 2017, no. 13 (April 3, 2017): 1923–29. http://dx.doi.org/10.1002/ejic.201601424.

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39

Wang, Li, Mingguang Ren, Zihong Li, Lixuan Dai, and Weiying Lin. "Development of a FRET-based ratiometric fluorescent probe to monitor the changes in palladium(ii) in aqueous solution and living cells." New Journal of Chemistry 43, no. 2 (2019): 552–55. http://dx.doi.org/10.1039/c8nj04866e.

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We have developed a new small-molecule based, mitochondrial-targeted ratiometric fluorescent palladium(ii) probe (CR-Pd). Fluorescence imaging shows that CR-Pd is suitable for the ratiometric visualization of palladium(ii) in living cells.

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40

Zhao, Huaixia, Yangxin Wang, and Ruihu Wang. "In situ formation of well-dispersed palladium nanoparticles immobilized in imidazolium-based organic ionic polymers." Chem. Commun. 50, no. 74 (2014): 10871–74. http://dx.doi.org/10.1039/c4cc04662e.

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A new strategy for the synthesis of well-dispersed palladium nanoparticles (NPs) immobilized in imidazolium-based porous organic ionic polymers was presented in this study. The as-synthesized polymers showed excellent catalytic activity and reusability in the hydrogenation of nitroarenes without extra addition of palladium species.

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41

Singh, Mukesh P., and Santosh Chaurasia. "Influence of Buffer Thickness on Sensitivity of Pd-Coated Side Polished Single Mode Optical Fiber Hydrogen Sensor." Proceedings 2, no. 13 (November 26, 2018): 1078. http://dx.doi.org/10.3390/proceedings2131078.

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Optical fiber sensor which is based on palladium is highly sensitive to detect hydrogen. In this paper we analyzed the effect of buffer on sensitivity. Sensitivity is affected due to presence of buffer between side polished fiber core and hydrogen absorbing palladium layer. We optimized the buffer thicknesses for different palladium thickness to achieve maximum sensitivity.

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42

Zhang, Dong. "Determination of Pd(II) in Street Dust and Water Samples by FAAS after Preconcentration with Dimethylglyoxime-Anchored Organobentonite." Advanced Materials Research 433-440 (January 2012): 24–28. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.24.

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A preconcentration method based on the adsorption of palladium-dimethylglyoxime -anchored organobentonite (DMG-bentonite) for the determination of palladium at trace levels by flame atomic absorption spectrometry (AAS) has been developed. The optimum experimental parameters for the adsorption and preconcentration of the palladium, such as pH value of medium, contact time, eluent and coexisting ion, have been investigated. The results showed that the palladium ion could be quantitatively retained by the DMG-bentonite in the pH range of 3–5 using citric acid/citrate buffer, the adsorption time was 20 min, and capability of adsorption was 8.73 mg•g-1. The palladium ion adsorbed on the DMG-bentonite could be completely eluated by using 1 mol•L-1 HCl. The detection limits of this method for palladium was 1.02µg•L-1 with an enrichment factor of 60. The method has been applied to the determination of trace amounts of palladium ion in street dust and environmental water with satisfactory results.

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43

Berhe, Seare A., Zachary B. Molinets, Maya N. Frodeman, Blair Miller, Vladimir N. Nesterov, Keith M. Haynes, Collin M. Perry, Marco T. Rodriguez, Roy N. McDougald, and W. Justin Youngblood. "Synthesis, photophysical characterization, and photoelectrochemical evaluation of a palladium porphyrin sensitizer for TiO2-based dye-sensitized solar cells." Journal of Porphyrins and Phthalocyanines 19, no. 09 (September 2015): 1021–31. http://dx.doi.org/10.1142/s1088424615500741.

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An unsymmetrical (A3B) palladium porphyrin bearing a cyanoacrylic acid at one meso position has been synthesized for evaluation as a photosensitizer in dye-sensitized solar cells based on titanium dioxide ( TiO 2) as a comparison to other metalloporphyrins and as a proxy for other potential triplet-state photosensitizer compounds. The synthesis of this palladium porphyrin has provided new insight into the mechanism and product distribution of decarboxylative hydrolysis of malonic acid when attached at the porphyrin meso position. A crystal structure determination for a meso-formyl palladium porphyrin has been determined, showing saddle-distortion of the porphyrin core. The photophysical behavior of the palladium porphyrin sensitizer and its performance in photoelectrochemical cells are described and interpreted in the context of bimolecular excited state quenching pathways including oxygen sensitization, triplet–triplet annihilation and electron transfer events. Palladium porphyrins are proposed as a sensitizer class with potential for high efficiency dye-sensitized solar cells, but with the caveat that some overpotential for electron injection is necessary to compete against the multiple decay pathways that are specially available to triplet state photosensitizers.

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44

Yudaev, Pavel, Irina Butorova, Gennady Stepanov, and Evgeniy Chistyakov. "Extraction of Palladium(II) with a Magnetic Sorbent Based on Polyvinyl Alcohol Gel, Metallic Iron, and an Environmentally Friendly Polydentate Phosphazene-Containing Extractant." Gels 8, no. 8 (August 8, 2022): 492. http://dx.doi.org/10.3390/gels8080492.

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In this work, a highly efficient and environmentally friendly method for extracting palladium from hydrochloric acid media was developed. The method uses a magnetic sorbent carrying an organophosphorus extractant, which is not washed from the sorbent into the aqueous phase. The extractant was characterized by 1H, 13C, and 31P NMR spectroscopy and MALDI TOF mass spectrometry, and the palladium complex based on it was characterized by IR spectroscopy. According to an in vitro microbiological study, the extractant was non-toxic to soil microflora. It was established that the water uptake and saturation magnetization of the magnetic sorbent were sufficient for use in sorption processes. The sorption efficiency of palladium(II) with the developed sorbent can reach 71% in one cycle. After treatment of the spent sorbent with 5 M hydrochloric acid, palladium was completely extracted from the sorbent. The new sorbent is proposed for the extraction of palladium from hydrochloric acid media obtained by the leaching of electronic waste.

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45

Mekmouche, Yasmina, Ludovic Schneider, Pierre Rousselot-Pailley, Bruno Faure, A. Jalila Simaan, Constance Bochot, Marius Réglier, and Thierry Tron. "Laccases as palladium oxidases." Chemical Science 6, no. 2 (2015): 1247–51. http://dx.doi.org/10.1039/c4sc02564d.

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46

Muris, Joris, Rik J. Scheper, Cornelis J. Kleverlaan, Thomas Rustemeyer, Ingrid M. W. van Hoogstraten, Mary E. von Blomberg, and Albert J. Feilzer. "Palladium-based dental alloys are associated with oral disease and palladium-induced immune responses." Contact Dermatitis 71, no. 2 (May 22, 2014): 82–91. http://dx.doi.org/10.1111/cod.12238.

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47

Saifullah, Mohammad S. M., Ramakrishnan Ganesan, Su Hui Lim, Hazrat Hussain, and Hong Yee Low. "Large area sub-100 nm direct nanoimprinting of palladium nanostructures." RSC Advances 6, no. 26 (2016): 21940–47. http://dx.doi.org/10.1039/c6ra00234j.

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Анотація:

We demonstrate a simple direct nanoimprinting method for fabricating palladium nanostructures that involves in situ free radical polymerization of a resin consisting of an acrylate-based crosslinker and a palladium metal precursor.

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48

Cavell, KJ, KY Chan, EJ Peacock, MJ Ridd, and NW Davies. "Olefin Isomerization Catalysts Based on Dithio Palladium(II) Complexes." Australian Journal of Chemistry 44, no. 2 (1991): 171. http://dx.doi.org/10.1071/ch9910171.

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The catalytic double-bond shift isomerization of α-olefins by dithio-β-diketonate palladium complexes Pd{CH3C(S)CHC(S)CH3}(PL1L2L3)X(1) and [Pd{CH3C(S)CHC(S)CH3}{Ph2PCH2CH2PPh2}]Y(2)(X = 1, Br; Y = halide, PF6, BPh4) is described. Catalysts are formed on activation of the complexes by a variety of alkylaluminium cocatalysts . Several of the catalysts are highly active for isomerization of oct-1-ene and but-1-ene, activities being higher than normally obtained for palladium systems. In contrast to the majority of palladium-based catalysts product distributions rapidly approached thermodynamic equilibrium, with a strong preference for trans products at each stage of the reaction. Products from the isomerization of oct-1-ene were analysed by g.l.c.-F.t.i.r . in conjunction with Kovats retention indices.

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49

Rosseau, Leon R. S., José A. Medrano, Rajat Bhardwaj, Earl L. V. Goetheer, Ivo A. W. Filot, Fausto Gallucci, and Martin van Sint Annaland. "On the Potential of Gallium- and Indium-Based Liquid Metal Membranes for Hydrogen Separation." Membranes 12, no. 1 (January 7, 2022): 75. http://dx.doi.org/10.3390/membranes12010075.

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The concept of liquid metal membranes for hydrogen separation, based on gallium or indium, was recently introduced as an alternative to conventional palladium-based membranes. The potential of this class of gas separation materials was mainly attributed to the promise of higher hydrogen diffusivity. The postulated improvements are only beneficial to the flux if diffusion through the membrane is the rate-determining step in the permeation sequence. Whilst this is a valid assumption for hydrogen transport through palladium-based membranes, the relatively low adsorption energy of hydrogen on both liquid metals suggests that other phenomena may be relevant. In the current study, a microkinetic modeling approach is used to enable simulations based on a five-step permeation mechanism. The calculation results show that for the liquid metal membranes, the flux is limited by the dissociative adsorption over a large temperature range, and that the membrane flux is expected to be orders of magnitude lower compared to the membrane flux through pure palladium membranes. Even when accounting for the lower cost of the liquid metals compared to palladium, the latter still outperforms both gallium and indium in all realistic scenarios, in part due to the practical difficulties associated with making liquid metal thin films.

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50

Sarantuya, Nasantogtokh, Xin Cui, and Zhi Ping Wang. "First-principles study of hydrogen diffusion in transition metal palladium." Modern Physics Letters B 29, no. 13 (May 18, 2015): 1550064. http://dx.doi.org/10.1142/s0217984915500645.

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Анотація:

By adopting the first-principles total energy calculations based on density functional theory (DFT), the diffuse pattern and path of hydrogen in bulk palladium are investigated by calculating the system energy of hydrogen atom occupying different positions in palladium crystal lattice. The results indicate that the most stable position of hydrogen atom in palladium crystal lattice locates at the octahedral interstice, and the tetrahedral interstice is the second stable site. Hydrogen diffusion along the indirect octahedral–tetrahedral–octahedral (O–T–O) path is energetically most favorable in transition metal palladium, and the activation energy is 0.5245 eV.

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