Journal
CHINESE JOURNAL OF CATALYSIS
Volume 27, Issue 10, Pages 932-936Publisher
SCIENCE PRESS
DOI: 10.1016/S1872-2067(06)60049-1
Keywords
platinum; ruthenium; nanowire; electrocatalyst; SBA-15; MCM-41; mesoporous molecular sieve; direct methanol fuel cell
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PtRu nanowires and nanorods with different alloy extents and aspect ratios were synthesized by impregnating and reducing Pt and Ru precursors using SBA-15 and MCM-41 mesoporous molecular sieves as the template, respectively. The results of X-ray powder diffraction, transmission electron microscopy, cyclic voltarnmetry, and linear sweep voltammetry demonstrated that the PtRu nanowires synthesized using SBA-15 as the template had a higher alloy extent, larger aspect ratio, and better electrocatalytic activity in a methanol and sulfuric acid solution than the PtRu nanorods synthesized using MCM-41 template. The effects of alloy extent and aspect ratio of PtRu electrocatalysts on the catalytic activity and anode performance of direct methanol fuel cells were discussed.
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