期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 37, 期 1, 页码 393-404出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2011.09.055
关键词
Catalyst support; Carbon nanofibers; Platinum; Electrocatalyst; Oxygen reduction reaction; PEMFC
资金
- Spanish Government MEC
- FEDER [NAN2004-09333-C05-02, NAN2004-09333-C05-01, NAN2004-09333-C05-04, NAN2004-09333-C05-05, NAN2004-09333-C05-03, MAT2008-06631-C03-03, MAT2008-06631-C03-01, MAT2008-06631-C03-02]
- CEGASA
- Basque Government for the IKERTU
The present work is focused on the synthesis of new catalysts of platinum supported on carbon nanofibers and their use in PEMFC electrodes. Carbon nanofibers (CNF) and functionalized carbon nanofibers (CNF-f), synthesized via the thermocatalytic decomposition of CH4, were characterized, in the presence and the absence of deposited Pt, by porosimetric, SEM, TPD, and HRTEM analyses, and compared to commercial Vulcan (R) XC72R carbon black (CB). CNF and CNF-f show similar BET surface areas, but smaller than that of CB, which have a large quantity of micropores. On the contrary, the microporosity in CNF and CNF-f was negligible, and the mesopores were the dominant pore structure. A single cell characterization of three catalysts Pt/CNF, Pt/CNF-f and Pt/CB was carried out, measuring the relevant kinetic parameters. The power density given by the Pt/CNF catalyst in the cathode catalyst layer was 1.5 times higher than that given by the Pt/CB catalyst at 0.600 V. It is shown when using functionalized carbon nanofibers in the anode catalyst layer, that functionalization by chemically modifying the surface of the nanofibers significantly affects the PEMFC performance. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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