Preparation of Pt-Ru bimetallic anodes by galvanostatic pulse electrodeposition:: characterization and application to the direct methanol fuel cell

被引：90

作者：

Coutanceau, C ^{[1
]}

Rakotondrainibé, AF ^{[1
]}

Lima, A ^{[1
]}

Garnier, E ^{[1
]}

Pronier, S ^{[1
]}

Léger, JM ^{[1
]}

Lamy, C ^{[1
]}

机构：

[1] Univ Poitiers, Equip Electrocatalyse, UMR CNRS 6503, F-86022 Poitiers, France

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2004年 / 34卷 / 01期

关键词：

carbon electrode; DMFC; electrodeposition; galvanostatic pulses; platinum-ruthenium catalysts;

D O I：

10.1023/B:JACH.0000005578.83646.3a

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrodeposition of platinum and ruthenium was carried out on carbon electrodes to prepare methanol anodes with different Pt/ Ru atomic ratios using a galvanostatic pulse technique. Characterizations by XRD, TEM, EDX and atomic absorption spectroscopy indicated that most of the electrocatalytic anodes consisted of 2 mg cm(-2) of Pt - Ru alloy particles with the desired composition and with particle sizes ranging from 5 to 8 nm. Electrochemical tests in a single DMFC show that these electrodes are very active for methanol oxidation and that the best Pt/ Ru atomic ratio in the temperature range used ( 50 - 110degreesC) is 80: 20. The influence of the relaxation time t(off) was also studied and it appeared that a low t(off) led to smaller particle sizes and higher performances in terms of current density and power density.

引用

页码：61 / 66

页数：6

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