Preparation of Pt–Ru bimetallic anodes by galvanostatic pulse electrodeposition: characterization and application to the direct methanol fuel cell
Preparation of Pt–Ru bimetallic anodes by galvanostatic pulse electrodeposition: characterization and application to the direct methanol fuel cell
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DOI：
10.1023/b:jach.0000005578.83646.3a
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发表时间：
2004
影响因子：
2.9
通讯作者：
C. Coutanceau;A. Rakotondrainibe;A. Lima;E. Garnier;S. Pronier;J. Léger;C. Lamy
中科院分区：
文献类型：
--
作者：
C. Coutanceau;A. Rakotondrainibe;A. Lima;E. Garnier;S. Pronier;J. Léger;C. Lamy
采用恒电流脉冲技术在碳电极上电沉积铂和钌，制备不同Pt/Ru原子比的甲醇阳极。 XRD、TEM、EDX 和原子吸收光谱表征表明，大多数电催化阳极由 2 mg cm−2 的 Pt-Ru 合金颗粒组成，具有所需的成分，粒径范围为 5 至 8 nm。单个 DMFC 中的电化学测试表明，这些电极对于甲醇氧化非常活跃，并且在使用的温度范围（50–110 °C）内最佳 Pt/Ru 原子比为 80:20。还研究了弛豫时间toff 的影响，结果表明，低toff 会导致更小的颗粒尺寸和更高的电流密度和功率密度性能。
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−2of 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 (50–110 °C) is 80:20. The influence of the relaxation timetoffwas also studied and it appeared that a lowtoffled to smaller particle sizes and higher performances in terms of current density and power density.