Journal
CATALYSIS TODAY
Volume 160, Issue 1, Pages 109-115Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2010.05.018
Keywords
Mesoporous carbon; PtRu alloy; Direct methanol fuel cell; Phosphorus; EXAFS; Size effect
Funding
- National Science Council, Taiwan
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PtRu nanocatalyst supported on mesoporous carbon thin film (TFC) with incorporation of the non-metallic phosphorus is explored as an anodic catalytic material for direct methanol fuel cell (DMFC). The catalyst 20 wt.% PtRuP0.1/TFC gives a very high current density in the electrochemical oxidation of methanol, which is much enhanced than that of the PtRu/TFC without P loading and two times higher compared to a commercial PtRu/XC-72 catalyst. XPS and EXAFS analysis of the catalysts show that phosphorus helps to reduce the size of PtRu nanoalloy by acting as a surface protecting agent to the nanoparticles and it does not alter the electronic structure of PtRu. The PtRuP nanocatalyst with a particle size of 3 nm was found to have the best reactivity and catalytic stability. (C) 2010 Elsevier B.V. All rights reserved.
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