期刊
ELECTROCHIMICA ACTA
卷 56, 期 18, 页码 6431-6440出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.04.135
关键词
Alkaline; Methanol electrooxidat ion; Platinum-lead; Electrocatalyst; DFT
资金
- National Hi-Tech RD Program [2007AA05Z159, 2009AA05Z121, 2011AA050705]
- Chinese Academy of Sciences [GJHZ1135]
Carbon-supported bimetallic PtmPb1 (m = 1, 2, 3) electrocatalysts with different Pt/Pb atomic ratios were synthesized by a polyol method. The X-ray diffraction results reveal that a PtPb alloy formed in the PtmPb1/C electrocatalysts. TEM images show that the PtPb nanoparticles distribute uniformly on the carbon support, and are about 4-5 nm in size. The PtmPb1/C bimetallic catalysts show superior activities toward methanol electrooxidation reaction (MOR) than the Pt/C in alkaline media. Both CO stripping measurements and density functional theory studies reveal that CO adsorption decreased significantly on the PtmPb1/C bimetallic catalysts compared with on pure Pt, which may offer an explanation for the enhanced MOR activity of the PtmPb1/C bimetallic catalysts. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
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