Journal
ELECTROCHIMICA ACTA
Volume 87, Issue -, Pages 432-437Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.09.076
Keywords
Au-Pt core-shell nanoparticle; Self-assembly; Methanol; Electrooxidation
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Funding
- NSFC [20703016, 21176060]
- Scientific and Technological Projects of Hunan Province [2010FJ6030]
- Science Foundation for The Youth Scholars of Hunan University
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Au-Pt core-shell nanoparticles (Au-Pt NPs) as an effective bimetallic electrocatalyst for methanol oxidation has been extensively explored. However, the conventional drop-coating method for fabricating Au-Pt NP electrodes did not fully exploit the small size of the NPs. Here, self-assembly of Au-Pt NPs into monolayer arrays is proposed as an alternative for the preparation of Au-Pt NP catalytic electrode to ensure the exposure of each NP to electrolyte. Under the optimized condition, the Pt mass activity of the Au-Pt monolayer array was similar to 6 times better than that of the commercial Pt/C catalyst, and 3 times better than that of Au-Pt NP electrodes fabricated by a drop-coating method, indicating superior electrocatalytic activity. (C) 2012 Elsevier Ltd. All rights reserved.
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