期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 36, 期 12, 页码 7303-7309出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2011.03.032
关键词
Oxygen reduction reaction; Core/shell structure; Cathode catalyst; Se/Ru core/shell nanoparticles
资金
- National Science Council of Taiwan [NSC 98-2113-M-002-011-MY3, NSC 99-2627-M-002-016, NSC 99-2627-M-002-017]
- National Taiwan University
We have synthesized Se/Ru core/shell nanoparticles (NPs) as cathode electrocatalysts. By controlling the concentration of RuCl3, we obtained Se/Ru-0.2, Se/Ru-0.7, and Se/Ru-1.1 core/shell NPs. The mass activities of as-prepared catalysts were 58.0, 32.1, and 12.5 A/g, respectively; part of these values are higher than that (2.2 A/g) of a commercial PtRu electrode and those (22.8, 28.0, and 24.5 A/g) of traditional carbon-supported RuxSey electrodes. The Se/Ru-1.1 electrode generated the greatest current density and was more tolerant toward poisoning in the presence of 1 M MeOH; cyclic voltammetry measurements revealed that this electrode was stable for at least 100 cycles. This is the first example demonstrating preparation of Se/Ru core/shell NPs that provided excellent catalytic activity and stability toward oxidation of MeOH. With their ease of large-scale preparation, low cost, high electroactivity, and high stability, such Se/Ru core/shell NPs have great potential for use as cathode electrocatalysts in direct MeOH fuel cells. Crown Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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