Characterization of Pt-Cu binary catalysts for oxygen reduction for fuel cell applications

Chung Jen Tseng, Sheng Tsai Lo, Shen Chuan Lo, Peter P. Chu

研究成果: 雜誌貢獻期刊論文同行評審

57 引文 斯高帕斯(Scopus)

摘要

Nanostructured Pt-Cu/C alloy catalysts synthesized by a reduction procedure with different reducing agents are investigated to find the origin of the enhanced activity of the oxygen reduction reaction for fuel cell applications. Prepared catalysts are characterized by various techniques, such as energy dispersive X-ray spectrometry, X-ray diffraction, transmission electron microscopy (TEM) and cyclic voltammetry. XRD analysis shows that all prepared catalysts exhibit face-centered cubic structures and have smaller lattice parameters than pure Pt catalyst. TEM images show that the particle size of the catalysts increases with the heat treatment temperature, and that different reducing agent causes different particle size and dispersion of the binary catalysts on XC-72R. Using the polyol method with CuSO4 as the precursor, the Pt-Cu/C sample is found to have good dispersion and high Cu loading. The Pt-Cu/C sample has a slightly higher specific activity value than that of Pt/C. The catalytic activity can be enhanced greatly with hydrogen reduction at 300 °C. Higher reduction temperatures cause the catalytic particles to agglomerate and therefore decreased catalytic activity.

原文???core.languages.en_GB???
頁(從 - 到)385-390
頁數6
期刊Materials Chemistry and Physics
100
發行號2-3
DOIs
出版狀態已出版 - 10 12月 2006

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