Direct formic acid fuel cells on Pd catalysts supported on hybrid TiO2-C materials. Matos, J.; Borodzinski, A.; Zychora, A.; Kedzierzawski, P.; Mierzwa, B.; Juchniewicz, K.; Mazurkiewicz, M.; and Hernández-Garrido, J. Applied Catalysis B: Environmental, 163:167-178, 2015. cited By 12
Direct formic acid fuel cells on Pd catalysts supported on hybrid TiO2-C materials [link]Paper  doi  abstract   bibtex   
The electrooxidation of formic acid was performed on Pd-based catalysts supported on hybrid TiO2-C materials prepared from different carbon origins by solvothermal and slurry synthesis. It has been found that carbonized hybrid TiO2-C supports with mesopore texture and high anatase:rutile ratio in the TiO2 framework led to about three times higher activity per Pd mass unit than the catalyst prepared on a commercial Vulcan XC-72 carbon black, which will allow to reduce considerably the amount of expensive noble metal at the anode of DFAFC. The conductivities of raw TiO2/C supports are several orders of magnitude lower than that for carbon Vulcan XC-72. However, the hybrid TiO2-C supports acquire high conductivity during palladium deposition. The rate of electrooxidation of formic acid on Pd/TiO2-C catalysts, calculated per one surface Pd atom (TOF), is for TOF<1s-1 independent of Pd particle size and morphology of the supports. Higher activity of the Pd/TiO2-C catalysts, compared to Pd/C catalyst, results from their higher hydrophilicity which ensures good access of formic acid to the Pd crystallites in the catalyst layer, and sufficiently high conductivity providing easy electron flow from the Pd active sites to current collector. Present results indicate that hybrid inorganic/organic materials are promising supports for the direct formic acid fuel cells with Pd-based catalysts. © 2014 Elsevier B.V.
@ARTICLE{Matos2015167,
author={Matos, J.a  and Borodzinski, A.b  and Zychora, A.M.b  and Kedzierzawski, P.b  and Mierzwa, B.b  and Juchniewicz, K.b  and Mazurkiewicz, M.c  and Hernández-Garrido, J.C.d },
title={Direct formic acid fuel cells on Pd catalysts supported on hybrid TiO2-C materials},
journal={Applied Catalysis B: Environmental},
year={2015},
volume={163},
pages={167-178},
doi={10.1016/j.apcatb.2014.07.063},
note={cited By 12},
url={https://www.scopus.com/inward/record.url?eid=2-s2.0-84906215079&partnerID=40&md5=4937a67113937bbf9090f3a7459b541d},
affiliation={Department of Photocatalysis and Alternative Energies, Venezuelan Institute for Scientific Research (IVIC), 20632, Caracas 1020-A, Venezuela; Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland; Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland; Departamento de Ciencia de los Materiales e Ingenieria Metalúrgica y Quimica Inorganica, Facultad de Ciencias, Universidad de Cádiz, Campus Rio San Pedro, Puerto Real, 11510 Cádiz, Spain},
abstract={The electrooxidation of formic acid was performed on Pd-based catalysts supported on hybrid TiO2-C materials prepared from different carbon origins by solvothermal and slurry synthesis. It has been found that carbonized hybrid TiO2-C supports with mesopore texture and high anatase:rutile ratio in the TiO2 framework led to about three times higher activity per Pd mass unit than the catalyst prepared on a commercial Vulcan XC-72 carbon black, which will allow to reduce considerably the amount of expensive noble metal at the anode of DFAFC. The conductivities of raw TiO2/C supports are several orders of magnitude lower than that for carbon Vulcan XC-72. However, the hybrid TiO2-C supports acquire high conductivity during palladium deposition. The rate of electrooxidation of formic acid on Pd/TiO2-C catalysts, calculated per one surface Pd atom (TOF), is for TOF&lt;1s-1 independent of Pd particle size and morphology of the supports. Higher activity of the Pd/TiO2-C catalysts, compared to Pd/C catalyst, results from their higher hydrophilicity which ensures good access of formic acid to the Pd crystallites in the catalyst layer, and sufficiently high conductivity providing easy electron flow from the Pd active sites to current collector. Present results indicate that hybrid inorganic/organic materials are promising supports for the direct formic acid fuel cells with Pd-based catalysts. © 2014 Elsevier B.V.},
author_keywords={Formic acid;  Fuel cells;  Pd-based catalysts},
document_type={Article},
source={Scopus},
}
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