Journal
FUEL CELLS
Volume 10, Issue 6, Pages 914-919Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/fuce.201000126
Keywords
Direct Methanol Fuel Cell; Microwave-Assisted Polyol Process; pH Value; PtRu/C Catalyst
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Funding
- Science and Technology Ministry of China [2009AA05Z111]
- National Natural Science Foundation of China [20606007]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
- Postdoctoral Science-Research Developmental Foundation of Heilongjiang Province of China [LBH-Q07044]
- Harbin Innovation Science Foundation for Youths [2007RFQXG042]
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PtRu/C catalysts with different mean particle sizes have been synthesised by microwave-assisted polyol process at various pH values and characterised by transmission electron microscopy (TEM), energy dispersive analysis of X-ray (EDAX) and X-ray diffraction (XRD). Their electrochemical performances have been tested by cyclic voltammetry, amperomeric i-t, and CO-stripping techniques. The effects of pH values on performances of the PtRu/C catalysts have been mainly investigated. It has been found that the particle size, composition and catalytic activity of the PtRu/C catalyst are very sensitive to the pH value of reducing solution, and the PtRu/C catalyst prepared at the pH value of 8 exhibits the better performance for methanol electrooxidation than the other samples. The size of the nanoparticles decreases as the pH value increases from 0.2 to 10 with the largest size of 4.4 nm and the smallest one of 2.1 nm. The two metal elements distribute uniformly in the catalyst and their metal loadings are similar to the theoretical value.
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