期刊
ELECTROCHIMICA ACTA
卷 115, 期 -, 页码 116-125出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.10.155
关键词
Oxides; Electrocatalysts; Oxygen reduction reaction; Hydrogen evolution reaction; Indium tin oxide
资金
- U.S. Department of Energy Office of Basic Energy Sciences [DE-FG02 10ER16200]
Tin-doped indium oxide (Sn-In2O3) and indium-doped tin oxide (In-SnO2) were synthesized and investigated as the supports for platinum (Pt) electrocatalysts. The electrochemical stability of the bare and platinized oxide supports was examined from -0.8 to 1.4 V vs. NHE. The Sn-In2O3 surface was generally stable at positive potentials, but experienced severe degradation at negative potentials due to the reduction/oxidation of the surface Sn and In species. In-SnO2 supports showed significant degradation over the entire potential range, which was caused by the preferential formation of Sn, SnO and In species. Neither Sn-In2O3 nor In-SnO2 are suitable as supports for hydrogen evolution catalysts. However, it was shown that Sn-In2O3 possessed very good stability at potentials relevant to the oxygen reduction reaction (>0.6 V), which enables its application as a cathode electrocatalyst support for PEM fuel cells. (C) 2013 Elsevier Ltd. All rights reserved.
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