Preparation of Pt-Ru/C catalysts for PEMFC by reverse micelles method

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作者：

School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China ^{[1
]}

不详 ^{[2
]}

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来源：

Nami Jishu yu Jingmi Gongcheng | 2008年 / 6卷 / 405-409期

关键词：

Cyclic voltammograms - Electrochemical performance - Energy dispersive spectrum (EDS) - Homogeneous distribution - PtRu/C catalysts - Relative crystallinity - Reverse micelles - Reverse micelles method;

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摘要：

Reverse micelles method was used in the preparation of Pt-Ru/C electrocatalysts for proton exchange membrane fuel cell(PEMFC). The reverse micelles system was composed of cyclohexane, water, surfactant and n-octanol. The influences of the ω value (the mol ratio of H2O to surfactant), and the different kinds of reductants and surfactants on the performance of Pt-Ru/C catalysts were investigated in the system. The Pt-Ru/C electrocatalysts with homogeneous distribution and small crystallite diameter were obtained by using the anionic surfactant SDS, a properly selected value of ω, and KBH4 solution as the reductant at room temperatures. The transmission electron microscopy (TEM) measurement shows that the average size of Pt-Ru particles is 3.1 nm in diameter. X-ray diffraction (XRD) analysis indicates the Pt-Ru/C catalysts have a high degree of alloying and a relative crystallinity of 3.1. The energy dispersive spectra (EDS) analysis confirms that the contents of Pt and Ru are close to the enactment values of experiment. The cyclic voltammogram measurement result in a mixture solution of 0.5 mol/L H2SO4 and 0.5 mol/L CH3OH shows that the electrochemical performance of the Pt-Ru/C catalysts prepared in this work is similar to that of Johnson Mattey Pt-Ru/C catalyst product.

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