Journal articles: 'PEM catalyst support'

1

Ye, Siyu, Miho Hall, and Ping He. "PEM Fuel Cell Catalysts: The Importance of Catalyst Support." ECS Transactions 16, no. 2 (December 18, 2019): 2101–13. http://dx.doi.org/10.1149/1.2982050.

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Lo, Chih-Ping, Amod Kumar, and V. Ramani. "RuxTi1-xO2 as Catalyst Support for PEM Fuel Cell." ECS Transactions 33, no. 1 (December 17, 2019): 493–505. http://dx.doi.org/10.1149/1.3484547.

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Gupta, Chanchal, Priyanka H. Maheshwari, Divya Sachdev, A. K. Sahu, and S. R. Dhakate. "Highly purified CNTs: an exceedingly efficient catalyst support for PEM fuel cell." RSC Advances 6, no. 38 (2016): 32258–71. http://dx.doi.org/10.1039/c5ra28029j.

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4

Ambrosio, E. P., M. A. Dumitrescu, C. Francia, C. Gerbaldi, and P. Spinelli. "Ordered Mesoporous Carbons as Catalyst Support for PEM Fuel Cells." Fuel Cells 9, no. 3 (June 2009): 197–200. http://dx.doi.org/10.1002/fuce.200800082.

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5

Negro, E., M. A. De Vries, R. Latsuzbaia, and G. J. M. Koper. "Networked Graphitic Structures as Durable Catalyst Support for PEM Electrodes." Fuel Cells 14, no. 3 (February 13, 2014): 350–56. http://dx.doi.org/10.1002/fuce.201300175.

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6

Lo, Chih-Ping, Guanxiong Wang, Amod Kumar, and Vijay Ramani. "RuO2•xH2O-TiO2 as Catalyst Support for PEM Fuel Cells." ECS Transactions 41, no. 1 (December 16, 2019): 1249–55. http://dx.doi.org/10.1149/1.3635656.

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7

Guha, Abhishek, Weijie Lu, Thomas A. Zawodzinski, and David A. Schiraldi. "Surface-modified carbons as platinum catalyst support for PEM fuel cells." Carbon 45, no. 7 (June 2007): 1506–17. http://dx.doi.org/10.1016/j.carbon.2007.03.023.

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8

Mazúr, Petr, Jakub Polonský, Martin Paidar, and Karel Bouzek. "Non-conductive TiO2 as the anode catalyst support for PEM water electrolysis." International Journal of Hydrogen Energy 37, no. 17 (September 2012): 12081–88. http://dx.doi.org/10.1016/j.ijhydene.2012.05.129.

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9

Pashaie, Pouya, Mohsen Shakeri, and Reza Miremadeddin. "A Kw-Scale Integrated System for On-Demand Hydrogen Generation Using NaBH₄ Solution and a Low-Cost Catalyst." Advanced Materials Research 664 (February 2013): 795–800. http://dx.doi.org/10.4028/www.scientific.net/amr.664.795.

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Among several hydrogen storage methods for application in fuel cells, on-board hydrogen generation using sodium borohydride (NaBH4; a chemical hydride) for application in proton exchange membrane (PEM) fuel cells can be considered as a low-weight method for portable applications. In this paper, an integrated continuous-flow system for on-demand hydrogen generation from the hydrolysis reaction of the NaBH4 solution in the presence of a low-cost catalyst is proposed. By using the prepared non-noble Co(NO3)2 on porous alpha-alumina support, as catalyst, the cost of the catalyst has cut down considerably. Up to 15 SLPM high-purity hydrogen gas is expected to be generated by this system to supply to a 1 kW-scale proton exchange membrane (PEM) fuel cell stack (H2-air, 40% efﬁciency).

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10

Long, Donghui, Wei Li, Wenming Qiao, Jin Miyawaki, Seong-Ho Yoon, Isao Mochida, and Licheng Ling. "Partially unzipped carbon nanotubes as a superior catalyst support for PEM fuel cells." Chemical Communications 47, no. 33 (2011): 9429. http://dx.doi.org/10.1039/c1cc13488d.

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11

Kayarkatte, Manoj Krishna, Öznur Delikaya, and Christina Roth. "Polyacrylic acid-Nafion composites as stable catalyst support in PEM fuel cell electrodes." Materials Today Communications 16 (September 2018): 8–13. http://dx.doi.org/10.1016/j.mtcomm.2018.02.003.

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12

Polonský, Jakub, Petr Mazúr, Martin Paidar, and Karel Bouzek. "Investigation of β-SiC as an anode catalyst support for PEM water electrolysis." Journal of Solid State Electrochemistry 18, no. 8 (January 23, 2014): 2325–32. http://dx.doi.org/10.1007/s10008-014-2388-0.

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13

Yu, Ru-Jun, Guang-Yi Cao, Xiu-Qing Liu, Zhong-Fang Li, Wei Xing, and Xin-Jian Zhu. "Fabrication of Support Tubular Proton Exchange Membrane For Fuel Cell." Journal of Fuel Cell Science and Technology 4, no. 4 (April 17, 2006): 520–24. http://dx.doi.org/10.1115/1.2759501.

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The support tubular proton exchange membranes (STPEMs) were fabricated successfully by impregnating porous silica pipe into a solution of perfluorinated resin. The structures of the inner, outer, and cross section of support PEM tube were characterized intensively by scanning electron microscopy observation. In addition, the conductivity and impermeability were measured by electrochemical impedance spectroscopy (EIS) and the bubble method, respectively. Results show that the conductivity of the PEM can reach as low as 1.46S∕m when using the silica pipe of 0.7mm wall thickness. Subsequently, the ST membrane electrode assembly for direct methanol fuel cell (DMFC) and proton exchange membrane fuel cell (PEMFC) applications was prepared first by loading Pt∕C and Pt–Ru∕C catalyst ink onto the outer and inner surfaces of the PEM tube, respectively. The performances of the tubular DMFC and the PEMFC were tested on a self-made apparatus, which shows that the power density of tubular DMFC can reach 10mWcm−2 when 4molL−1 methanol solution flows through the anode at 80°C, and that the power density of tubular PEMFC can reach up to 60mWcm−2 when hydrogen flows at the rates of 20mlmin−1 through the anode at 60°C, both the cathodes adopting air-breathing mode.

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14

Wang, G., E. Niangar, K. Huang, D. Atienza, A. Kumar, N. Dale, K. Oshihara, and V. K. Ramani. "Indium Tin Oxide as Catalyst Support for PEM Fuel Cell: RDE and MEA Performance." ECS Transactions 69, no. 17 (October 2, 2015): 1179–205. http://dx.doi.org/10.1149/06917.1179ecst.

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15

Krishnan, Palanichamy, Suresh G. Advani, and Ajay K. Prasad. "Magneli phase Ti n O2n − 1 as corrosion-resistant PEM fuel cell catalyst support." Journal of Solid State Electrochemistry 16, no. 7 (February 16, 2012): 2515–21. http://dx.doi.org/10.1007/s10008-012-1663-1.

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16

Chellasamy, Velu, and Ramasamy Manoharan. "The Role of Nanostructured Active Support Materials in Electrocatalysis of Direct Methanol Fuel Cell Reactions." Materials Science Forum 710 (January 2012): 709–14. http://dx.doi.org/10.4028/www.scientific.net/msf.710.709.

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The necessity for developing oxidation–resistant noncarbon catalyst support materials for use in the electrode/electrolyte interface of proton exchange membrane (PEM) based direct methanol fuel cells (DMFCs) is emphasized. A great deal of attention is currently being paid to nanostructured catalytic and support materials for electrocatalysing both anodic methanol oxidation reaction (MOR) and cathodic oxygen reduction reaction (ORR). The performances of various nanostructured transition metal oxides have been reviewed. Mn3O4 nanorods have been synthesized by us and their performances for electrocatalysing the MOR with Pd catalyst are discussed. A model explaining how nanostructured active support materials can extract active oxygen atoms required for complete oxidation of methanol from the electrolyte and supply to the adjacent catalytic sites has been proposed.

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17

Dahl, Paul I., Luis C. Colmenares, Alejandro O. Barnett, Scott Lomas, Per E. Vullum, Jannicke H. Kvello, Julian R. Tolchard, Sidsel M. Hanetho, and Tommy Mokkelbost. "Flame spray pyrolysis of tin oxide-based Pt catalysts for PEM fuel cell applications." MRS Advances 2, no. 28 (2017): 1505–10. http://dx.doi.org/10.1557/adv.2017.104.

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ABSTRACTSnO2 doped with Sb and Nb has been investigated for its use as catalyst support materials replacing carbon to enhance PEM fuel cells stability. Nanostructured powders of various doping levels were prepared by flame spray pyrolysis (FSP). The specific requirements of surface area >50 m2g-1 and electronic conductivity >0.01 Scm-1 were obtained, and pore sizes ranging mainly from 10 to 100 nm. Pt particles (9-20 wt.% in loading targeted) of ∼1 nm well dispersed in Sb-doped SnO2 was prepared by a one-step FSP procedure providing microstructures of high interest for further investigations as cathode in PEM fuel cells.

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18

Liu, Yuxiu, Chunxin Ji, Wenbin Gu, Jacob Jorne, and Hubert A. Gasteiger. "Effects of Catalyst Carbon Support on Proton Conduction and Cathode Performance in PEM Fuel Cells." Journal of The Electrochemical Society 158, no. 6 (2011): B614. http://dx.doi.org/10.1149/1.3562945.

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19

Seifitokaldani, A., and O. Savadogo. "Electrochemically Stable Titanium Oxy-Nitride Support for Platinum Electro-Catalyst for PEM Fuel Cell Applications." Electrochimica Acta 167 (June 2015): 237–45. http://dx.doi.org/10.1016/j.electacta.2015.03.189.

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20

Marinkas, Angela, Francesco Arena, Jens Mitzel, Günther M. Prinz, Angelika Heinzel, Volker Peinecke, and Harald Natter. "Graphene as catalyst support: The influences of carbon additives and catalyst preparation methods on the performance of PEM fuel cells." Carbon 58 (July 2013): 139–50. http://dx.doi.org/10.1016/j.carbon.2013.02.043.

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21

Guilminot, Elodie, Florent Fischer, Marian Chatenet, Arnaud Rigacci, Sandrine Berthon-Fabry, Patrick Achard, and Eric Chainet. "Use of cellulose-based carbon aerogels as catalyst support for PEM fuel cell electrodes: Electrochemical characterization." Journal of Power Sources 166, no. 1 (March 2007): 104–11. http://dx.doi.org/10.1016/j.jpowsour.2006.12.084.

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22

Devrim, Yılser, and Elif Damla Arıca. "Investigation of the effect of graphitized carbon nanotube catalyst support for high temperature PEM fuel cells." International Journal of Hydrogen Energy 45, no. 5 (January 2020): 3609–17. http://dx.doi.org/10.1016/j.ijhydene.2019.01.111.

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23

Lei, M., T. Z. Yang, W. J. Wang, K. Huang, R. Zhang, X. L. Fu, H. J. Yang, Y. G. Wang, and W. H. Tang. "Self-assembled mesoporous carbon sensitized with ceria nanoparticles as durable catalyst support for PEM fuel cell." International Journal of Hydrogen Energy 38, no. 1 (January 2013): 205–11. http://dx.doi.org/10.1016/j.ijhydene.2012.09.150.

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24

Daş, Elif, and Ayşe Bayrakçeken Yurtcan. "Effect of carbon ratio in the polypyrrole/carbon composite catalyst support on PEM fuel cell performance." International Journal of Hydrogen Energy 41, no. 30 (August 2016): 13171–79. http://dx.doi.org/10.1016/j.ijhydene.2016.05.167.

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25

Leon Yu, Tzyy-Lung, Hsiu-Li Lin, Po-Hao Su, and Guan-Wen Wang. "Structures of Membrane Electrode Assembly Catalyst Layers for Proton Exchange Membrane Fuel Cells." Open Fuels & Energy Science Journal 5, no. 1 (July 10, 2012): 28–38. http://dx.doi.org/10.2174/1876973x01205010028.

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In this paper, we modify the conventional 5-layer membrane electrode assembly (MEA, in which a proton exchange membrane (PEM) is located at its center, two Pt-C-40 (Pt on carbon powder support, Pt content 40 wt.%) catalyst layers (CLs) are located on the surfaces of the both sides of the PEM and two gas diffusion layers (GDLs) are attached next on the outer surfaces of two Pt-C-40 layers) and propose 7-layer and 9-layer MEAs by coating thin Pt-black CLs at the interfaces between the Pt-C-40 layer and the GDL and between the PEM and the Pt-C-40 layer and reducing the Pt-C-40 loading. The reduced Pt loading quantity of the Pt-C-40 layer is equal to the increased Pt loading quantity of the Pt-black layer, thus the total amount of Pt loadings in the unmodified conventional MEA and the modified MEAs are at a fixed Pt loading quantity. These modified MEAs may complicate the manufacture process. The main advantage of these 7- and 9-layer MEAs is the thinner CL thickness and thus lower CL proton transport resistance. Because of the thin Pt-black layer thickness in MEA, we avoid agglomeration of the Pt-black particles and maintain high Pt catalytic activity. We show these new CL structure MEAs have better fuel cells performance than the conventional 5-layer MEA.

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26

Wang, Sen, Hong Lv, Yongwen Sun, Wenxuan Ji, Xiaojun Shen, and Cunman Zhang. "Constructing Supports–Network with N–TiO2 Nanofibres for Highly Efficient Hydrogen–Production of PEM Electrolyzer." World Electric Vehicle Journal 12, no. 3 (August 17, 2021): 124. http://dx.doi.org/10.3390/wevj12030124.

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Hydrogen production with a proton exchange membrane (PEM)electrolyzer utilized with renewable energy power is considered to be an efficient and clean green technique, but the poor oxygen evolution performance results in high energy consumption and low efficiency. In this work, a strategy is reported for the construction of a support network of the anodic catalyst layer to simultaneously ameliorate its sluggish reaction kinetics and mass transport in order to realize highly efficient hydrogen production of the PEM electrolyzer. After in situ synthesis of IrO2 nanoparticles on N–doped TiO2 nanofibers, the as–prepared IrO2/N–TiO2 electrode shows substantially enhanced Ir utilization and accelerated mass transport, consequently decreasing the corresponding cell potential of 107 mV relative to pure IrO2 at 2 A cm−2. The enhanced activity of IrO2/N–TiO2 could be due to the fact that the N–TiO2 nanofiber support can form a porous network, endowing IrO2/N–TiO2 with a large reactive contact interface and favorable mass transfer characters. The strategy in this work supplies a pathway to develop high–efficiency interfacial reaction materials for diverse applications.

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27

Pham, K. C., D. H. C. Chua, D. S. McPhail, and A. T. S. Wee. "The Direct Growth of Graphene-Carbon Nanotube Hybrids as Catalyst Support for High-Performance PEM Fuel Cells." ECS Electrochemistry Letters 3, no. 6 (April 16, 2014): F37—F40. http://dx.doi.org/10.1149/2.009406eel.

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28

Haas, Ole-Erich, Jean Marc Simon, and Signe Kjelstrup. "Surface Self-Diffusion and Mean Displacement of Hydrogen on Graphite and a PEM Fuel Cell Catalyst Support." Journal of Physical Chemistry C 113, no. 47 (October 29, 2009): 20281–89. http://dx.doi.org/10.1021/jp902491s.

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29

Yin, Shibin, Shichun Mu, Haifeng Lv, Niancai Cheng, Mu Pan, and Zhengyi Fu. "A highly stable catalyst for PEM fuel cell based on durable titanium diboride support and polymer stabilization." Applied Catalysis B: Environmental 93, no. 3-4 (January 12, 2010): 233–40. http://dx.doi.org/10.1016/j.apcatb.2009.09.034.

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30

Zhu, Weimin, Anna Ignaszak, Chaojie Song, Ryan Baker, Rob Hui, Jiujun Zhang, Feihong Nan, Gianluigi Botton, Siyu Ye, and Stephen Campbell. "Nanocrystalline tungsten carbide (WC) synthesis/characterization and its possible application as a PEM fuel cell catalyst support." Electrochimica Acta 61 (February 2012): 198–206. http://dx.doi.org/10.1016/j.electacta.2011.12.005.

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31

Fenini, Filippo, Kent Kammer Hansen, Cristian Savaniu, John T. S. Irvine, and Mogens Bjerg Mogensen. "Cr- and Ti-Based Spinels as Materials for Anodic Catalyst Support in PEM Electrolysis Cells: Assessing Corrosion Stability and Support Role in Catalyst Activity of Corrosion Stable Ceramics." ECS Transactions 85, no. 11 (April 5, 2018): 65–77. http://dx.doi.org/10.1149/08511.0065ecst.

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32

Guha, Abhishek, Thomas A. Zawodzinski, and David A. Schiraldi. "Evaluation of electrochemical performance for surface-modified carbons as catalyst support in polymer electrolyte membrane (PEM) fuel cells." Journal of Power Sources 172, no. 2 (October 2007): 530–41. http://dx.doi.org/10.1016/j.jpowsour.2007.07.035.

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33

Pushkareva, Irina V., Artem S. Pushkarev, Valery N. Kalinichenko, Ratibor G. Chumakov, Maksim A. Soloviev, Yanyu Liang, Pierre Millet, and Sergey A. Grigoriev. "Reduced Graphene Oxide-Supported Pt-Based Catalysts for PEM Fuel Cells with Enhanced Activity and Stability." Catalysts 11, no. 2 (February 15, 2021): 256. http://dx.doi.org/10.3390/catal11020256.

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Platinum (Pt)-based electrocatalysts supported by reduced graphene oxide (RGO) were synthesized using two different methods, namely: (i) a conventional two-step polyol process using RGO as the substrate, and (ii) a modified polyol process implicating the simultaneous reduction of a Pt nanoparticle precursor and graphene oxide (GO). The structure, morphology, and electrochemical performances of the obtained Pt/RGO catalysts were studied and compared with a reference Pt/carbon black Vulcan XC-72 (C) sample. It was shown that the Pt/RGO obtained by the optimized simultaneous reduction process had higher Pt utilization and electrochemically active surface area (EASA) values, and a better performance stability. The use of this catalyst at the cathode of a proton exchange membrane fuel cell (PEMFC) led to an increase in its maximum power density of up to 17%, and significantly enhanced its performance especially at high current densities. It is possible to conclude that the optimized synthesis procedure allows for a more uniform distribution of the Pt nanoparticles and ensures better binding of the particles to the surface of the support. The advantages of Pt/RGO synthesized in this way over conventional Pt/C are the high electrical conductivity and specific surface area provided by RGO, as well as a reduction in the percolation limit of the components of the electrocatalytic layer due to the high aspect ratio of RGO.

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34

Larsen, Mikkel Juul, and Eivind M. Skou. "ESR, XPS, and thin-film RRDE characterization of nano structured carbon materials for catalyst support in PEM fuel cells." Journal of Power Sources 202 (March 2012): 35–46. http://dx.doi.org/10.1016/j.jpowsour.2011.11.015.

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35

Rost, Ulrich, Michael Brodmann, Bruno Zekorn, Volker Peinecke, Ivan Radev, and Pit Podleschny. "PEM fuel cell electrode preparation using oxygen plasma treated graphene related material serving as catalyst support for platinum nanoparticles." Materials Today: Proceedings 4 (2017): S249—S252. http://dx.doi.org/10.1016/j.matpr.2017.09.195.

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36

Lv, Hong, Sen Wang, Chuanpu Hao, Wei Zhou, Jiakun Li, Mingzhe Xue, and Cunman Zhang. "Oxygen‐Deficient Ti 0.9 Nb 0.1 O 2‐x as an Efficient Anodic Catalyst Support for PEM Water Electrolyzer." ChemCatChem 11, no. 10 (April 25, 2019): 2511–19. http://dx.doi.org/10.1002/cctc.201900090.

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37

Alvar, Esmaeil Navaei, Biao Zhou, and S. Holger Eichhorn. "Carbon-embedded mesoporous Nb-doped TiO2 nanofibers as catalyst support for the oxygen reduction reaction in PEM fuel cells." Journal of Materials Chemistry A 4, no. 17 (2016): 6540–52. http://dx.doi.org/10.1039/c5ta08801a.

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38

Öztürk, Ayşenur, and Ayşe Bayrakçeken Yurtcan. "Synthesis of polypyrrole (PPy) based porous N-doped carbon nanotubes (N-CNTs) as catalyst support for PEM fuel cells." International Journal of Hydrogen Energy 43, no. 40 (October 2018): 18559–71. http://dx.doi.org/10.1016/j.ijhydene.2018.05.106.

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39

Öner, Emine, Ayşenur Öztürk, and Ayşe Bayrakçeken Yurtcan. "Utilization of the graphene aerogel as PEM fuel cell catalyst support: Effect of polypyrrole (PPy) and polydimethylsiloxane (PDMS) addition." International Journal of Hydrogen Energy 45, no. 60 (December 2020): 34818–36. http://dx.doi.org/10.1016/j.ijhydene.2020.05.053.

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40

Wang, Sen, Hong Lv, Fumin Tang, Yongwen Sun, Wenxuan Ji, Wei Zhou, Xiaojun Shen, and Cunman Zhang. "Defect engineering assisted support effect:IrO2/N defective g-C3N4 composite as highly efficient anode catalyst in PEM water electrolysis." Chemical Engineering Journal 419 (September 2021): 129455. http://dx.doi.org/10.1016/j.cej.2021.129455.

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41

Fang, Zhengyuan, Moo Seok Lee, Jun Young Kim, Jung Ho Kim, and Thomas F. Fuller. "The Effect of Carbon Support Surface Functionalization on PEM Fuel Cell Performance, Durability, and Ionomer Coverage in the Catalyst Layer." Journal of The Electrochemical Society 167, no. 6 (March 23, 2020): 064506. http://dx.doi.org/10.1149/1945-7111/ab7ea3.

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42

Li, Wei, and Alan M. Lane. "Investigation of Pt catalytic effects on carbon support corrosion of the cathode catalyst in PEM fuel cells using DEMS spectra." Electrochemistry Communications 11, no. 6 (June 2009): 1187–90. http://dx.doi.org/10.1016/j.elecom.2009.04.001.

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43

Rost, Ulrich, Roxana Muntean, Pit Podleschny, Gabriela Marginean, Michael Brodmann, and Viorel Aurel Şerban. "Influence of the Graphitisation Degree of Carbon Nano Fibres Serving as Support Material for Noble Metal Electro Catalysts on the Performance of PEM Fuel Cells." Solid State Phenomena 254 (August 2016): 27–32. http://dx.doi.org/10.4028/www.scientific.net/ssp.254.27.

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In this experimental work polymer electrolyte membrane fuel cell (PEMFC) electrodes are analysed, which are prepared by the use of two sorts of carbon nano fibres (CNF) serving as support material for platinum nano particles. Those CNFs, which are heat treated subsequently to their production, have a higher graphitisation degree than fibres as produced. The improved graphitisation degree leads to higher electrical conductivity, which is favourably for the use in PEMFC electrodes. Samples have been analysed, in order to determine graphitisation degree, electrical conductivity, as well as morphology and loading of the prepared electro catalyst. Membrane electrode assemblies manufactured from prepared electrodes are analysed in-situ in a PEM fuel cell test environment. It has been determined that power output for samples containing CNFs with higher graphitisation degree is increased by about 13.5 %.

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44

Calvillo, L., M. Gangeri, S. Perathoner, G. Centi, R. Moliner, and M. J. Lázaro. "Synthesis and performance of platinum supported on ordered mesoporous carbons as catalyst for PEM fuel cells: Effect of the surface chemistry of the support." International Journal of Hydrogen Energy 36, no. 16 (August 2011): 9805–14. http://dx.doi.org/10.1016/j.ijhydene.2011.03.023.

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45

Fiorenza, Roberto, Luca Spitaleri, Antonino Gulino, and Salvatore Sciré. "High-Performing Au-Ag Bimetallic Catalysts Supported on Macro-Mesoporous CeO2 for Preferential Oxidation of CO in H2-Rich Gases." Catalysts 10, no. 1 (January 1, 2020): 49. http://dx.doi.org/10.3390/catal10010049.

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We report here an investigation on the preferential oxidation of carbon monoxide in an H2-rich stream (CO-PROX reaction) over mono and bimetallic Au-Ag samples supported on macro-mesoporous CeO2. The highly porous structure of ceria and the synergistic effect, which occurs between the bimetallic Au-Ag system and the support, led to promising catalytic performance at low temperature (CO2 yield of 88% and CO2 selectivity of 100% at 60 °C), which is suitable for a possible application in the polymer electrolyte membrane fuel cell (PEMFC). The morphological, structural, textural and surface features of the catalysts were determined by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), N2-adsoprtion-desorption measurements, Temperature Programmed Reduction in hydrogen (H2-TPR), Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Photoelectron Spectroscopy (XPS). Furthermore, the catalytic stability of the best active catalyst, i.e., the AuAg/CeO2 sample, was evaluated also in the presence of water vapor and carbon dioxide in the gas stream. The excellent performances of the bimetallic sample, favored by the peculiar porosity of the macro-mesoporous CeO2, are promising for possible scale-up applications in the H2 purification for PEM fuel cells.

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46

Grigoriev, Sergey, Vladimir Fateev, Artem Pushkarev, Irina Pushkareva, Natalia Ivanova, Valery Kalinichenko, Mikhail Yu. Presnyakov, and Xing Wei. "Reduced Graphene Oxide and Its Modifications as Catalyst Supports and Catalyst Layer Modifiers for PEMFC." Materials 11, no. 8 (August 10, 2018): 1405. http://dx.doi.org/10.3390/ma11081405.

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Reduced graphene oxide (RGO) and RGO modified by ozone (RGO-O) and fluorine (RGO-F) were synthesized. Pt nanoparticles were deposited on these materials and also on Vulcan XC-72 using the polyol method. The structural and electrochemical properties of the obtained catalysts were investigated in a model glass three-electrode electrochemical cell and in a laboratory PEM fuel cell. Among the RGO-based catalysts, the highest electrochemically active surface area (EASA) was obtained for the oxidized RGO supported catalyst. The EASA of the fluorine-modified RGO-supported catalyst was half as big. In the PEM fuel cell the performance of RGO-based catalysts did not exceed the activity of Vulcan XC-72-based catalysts. However, the addition of an RGO-O-based catalyst to Vulcan XC-72-based catalyst (in contrast to the RGO-F-based catalyst) allowed us to increase the catalyst layer activity and PEM fuel cell performance. Possible reasons for such an effect are discussed.

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47

Kravos, Andraž, Ambrož Kregar, Kurt Mayer, Viktor Hacker, and Tomaž Katrašnik. "Identifiability Analysis of Degradation Model Parameters from Transient CO2 Release in Low-Temperature PEM Fuel Cell under Various AST Protocols." Energies 14, no. 14 (July 20, 2021): 4380. http://dx.doi.org/10.3390/en14144380.

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The detrimental effects of the catalyst degradation on the overall envisaged lifetime of low-temperature proton-exchange membrane fuel cells (LT-PEMFCs) represent a significant challenge towards further lowering platinum loadings and simultaneously achieving a long cycle life. The elaborated physically based modeling of the degradation processes is thus an invaluable step in elucidating causal interaction between fuel cell design, its operating conditions, and degradation phenomena. However, many parameters need to be determined based on experimental data to ensure plausible simulation results of the catalyst degradation models, which proves to be challenging with the in situ measurements. To fill this knowledge gap, this paper demonstrates the application of a mechanistically based PEMFC modeling framework, comprising real-time capable fuel cell performance, and platinum and carbon support degradation models, to model transient CO2 release rates in the LT-PEMFCs with the consistent calibration of reaction rate parameters under multiple different accelerated stress tests at once. The results confirm the credibility of the physical and chemical modeling basis of the proposed modeling framework, as well as its prediction and extrapolation capabilities. This is confirmed by an increase of only 29% of root mean square deviations values when using a model calibrated on all three data sets at once in comparison to a model calibrated on only one data set. Furthermore, the unique identifiability and interconnection of individual model calibration parameters are determined via Fisher information matrix analysis. This analysis enables optimal reduction of the set of calibration parameters, which results in the speed up of both the calibration process and the general simulation time while retaining the full extrapolation capabilities of the framework.

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Jia, Mei Lin, Meng Jie Feng, Xu Li, and Zhao Ri Ge Tu Bao. "The Performance of Gold Nanoparticles Supported on Mesoporous Zirconia for the Synthesis of Azoxybenzene." Advanced Materials Research 936 (June 2014): 343–46. http://dx.doi.org/10.4028/www.scientific.net/amr.936.343.

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Gold nanoparticles supported on mesoporous ZrO2 were prepared and their performance for the selective reductions of nitrobenzene to azoxybenzene was investigated. It was found that azoxybenzene could be successfully synthesized over these catalysts. Furthermore, the catalytic activity of catalysts is dependent on the pore size of catalyst. The catalyst Au/ZrO2-PEG-1000 with pore size of 2.2 showed higher activity than Au/ZrO2-PEG-600 with pore size of 1.9nm.

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Xu, Pan, Wenzhao Chen, Qiang Wang, Taishan Zhu, Mingjie Wu, Jinli Qiao, Zhongwei Chen, and Jiujun Zhang. "Effects of transition metal precursors (Co, Fe, Cu, Mn, or Ni) on pyrolyzed carbon supported metal-aminopyrine electrocatalysts for oxygen reduction reaction." RSC Advances 5, no. 8 (2015): 6195–206. http://dx.doi.org/10.1039/c4ra11643g.

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In the past four decades, non-precious metal catalysts (NPMCs) have been extensively studied as low-cost catalyst alternatives to Pt for the oxygen reduction reaction (ORR) in polymer electrolyte membrane (PEM) fuel cells.

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Hayashi, Toru, Nadège Bonnet-Mercier, Akira Yamaguchi, Kazumasa Suetsugu, and Ryuhei Nakamura. "Electrochemical characterization of manganese oxides as a water oxidation catalyst in proton exchange membrane electrolysers." Royal Society Open Science 6, no. 5 (May 2019): 190122. http://dx.doi.org/10.1098/rsos.190122.

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The performance of four polymorphs of manganese (Mn) dioxides as the catalyst for the oxygen evolution reaction (OER) in proton exchange membrane (PEM) electrolysers was examined. The comparison of the activity between Mn oxides/carbon (Mn/C), iridium oxide/carbon (Ir/C) and platinum/carbon (Pt/C) under the same condition in PEM electrolysers showed that the γ-MnO 2 /C exhibited a voltage efficiency for water electrolysis comparable to the case with Pt/C, while lower than the case with the benchmark Ir/C OER catalyst. The rapid decrease in the voltage efficiency was observed for a PEM electrolyser with the Mn/C, as indicated by the voltage shift from 1.7 to 1.9 V under the galvanostatic condition. The rapid deactivation was also observed when Pt/C was used, indicating that the instability of PEM electrolysis with Mn/C is probably due to the oxidative decomposition of carbon supports. The OER activity of the four types of Mn oxides was also evaluated at acidic pH in a three-electrode system. It was found that the OER activity trends of the Mn oxides evaluated in an acidic aqueous electrolyte were distinct from those in PEM electrolysers, demonstrating the importance of the evaluation of OER catalysts in a real device condition for future development of noble-metal-free PEM electrolysers.

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Journal articles on the topic 'PEM catalyst support'

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