Methanol electro-oxidation by a ternary Pt–Ru–Cu catalyst identified by a combinatorial approach
Methanol electro-oxidation by a ternary Pt–Ru–Cu catalyst identified by a combinatorial approach
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DOI：
10.1016/j.jpowsour.2008.08.058
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发表时间：
2008-12
影响因子：
9.2
通讯作者：
M. Jeon;J. Cooper;P. McGinn
中科院分区：
文献类型：
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作者：
M. Jeon;J. Cooper;P. McGinn
采用组合合成和高通量筛选方法对甲醇电氧化反应（莫尔）中Pt-Ru-Cu三元体系的组成进行了优化。通过溅射系统制备Pt-Ru-Cu系统的薄膜库以产生63种不同的组合物。通过多通道多电极分析仪并行表征组合物。对于Pt 66 Ru 17 Cu 17组合物观察到最高的莫尔活性。合成了Pt 66 Ru 17 Cu 17/C组合物并表征为粉末催化剂以验证这种新组合物的性能。在循环伏安法测试期间，Pt 66 Ru 17 Cu 17/C催化剂显示出比Pt 50 Ru 50/C催化剂更少的溶解和Ru的不可逆氧化，随着循环次数的增加。在莫尔还原活性测量实验中，Pt 66 Ru 17 Cu 17/C催化剂在循环和计时电流测试中分别比Pt 50 Ru 50/C催化剂表现出高26%和86%的活性。
Composition optimization of the ternary Pt–Ru–Cu system for the methanol electro-oxidation reaction (MOR) was performed by combinatorial synthesis and high-throughput screening methods. A thin film library of the Pt–Ru–Cu system was prepared by a sputtering system to generate 63 different compositions. The compositions were characterized in parallel by a multichannel multielectrode analyzer. The highest MOR activity was observed for the Pt66Ru17Cu17composition. The Pt66Ru17Cu17/C composition was synthesized and characterized as a powder catalyst to verify the performance of this new composition. During cyclic voltammetry tests, the Pt66Ru17Cu17/C catalyst showed less dissolution and irreversible oxidation of Ru than a Pt50Ru50/C catalyst, with increasing number of cycles. In MOR activity measurement experiments, the Pt66Ru17Cu17/C catalyst exhibited 26 and 86% higher activities in cyclic and chronoamperometric tests, respectively, than those of the Pt50Ru50/C catalyst.