期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 40, 期 6, 页码 2621-2630出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2014.12.005
关键词
Copper nanowires; Methanol electro-oxidation; Tafel plots; Overall reaction orders
资金
- National Basic Research Program of China [2013CB934001]
- Natural Science Foundation of Beijing [2051001]
- International S&T Cooperation Program of China [2012DFR60530]
Binary shell-core structured electro-catalysts have attracted great attention owing to their superior catalytic performance and low material costs with respect to those monometallic catalysts. A novel Pd decorated copper nanowires (Pd@CNVVs) electro-catalyst has been fabricated through the facile hydrometallurgy approach. Pd shells with a thickness of 30-50 nm are uniformly deposited onto the as-prepared CNWs surface, in which ultra-long CNWs (with an average diameter and length of 100 +/- 20 nm and 35 +/- 5 pm) are used as the one dimensional skeleton as well as reduction agent. Pd@CNWs catalyst exhibits higher catalytic activity and better durability for the methanol electro-oxidation (MEO) in comparison with Pd-Cu. The Tafel analysis reveals that the first charge transfer is the rate-determining step of MEO on Pd@CNWs electrode. The overall MEO reaction orders on Pd@CNWs electrode for CH3OH (ca. 0.23) and OH- (ca. 0.22) reveal that the MED mechanism maintains unchanged with increasing the CH3OH or OH- concentration at all of the Tafel ranges. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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