Polyoxometalate-modified carbon nanotubes: new catalyst support for methanol electro-oxidation.
Polyoxometalate-modified carbon nanotubes: new catalyst support for methanol electro-oxidation.
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DOI：
10.1021/la053171w
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发表时间：
2006-05
期刊：
影响因子：
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通讯作者：
Dawei Pan;Jinhua Chen;Wenyan Tao;L. Nie;S. Yao
中科院分区：
文献类型：
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作者：
Dawei Pan;Jinhua Chen;Wenyan Tao;L. Nie;S. Yao
本文通过聚氧乙烯酸盐与碳之间的化学吸附，提出了一种新型催化剂载体-聚氧乙烯酸盐修饰碳纳米管。将Pt和Pt-Ru纳米粒子电沉积在聚氧乙烯酸盐修饰的碳纳米管电极上，研究了其对甲醇的电催化氧化性能。由于碳纳米管独特的电性能和聚氧乙烯酸盐优异的氧化还原性能和高质子导电性，在Pt和Pt-Ru催化剂沉积电荷相近的情况下，聚氧乙烯酸盐修饰的碳纳米管电极的交换电流密度是未修饰电极的1.4倍，比活性是未修饰电极的1.5倍，循环稳定性更好。这些结果表明聚氧乙烯酸盐修饰的碳纳米管作为一种新型催化剂载体在直接甲醇燃料电池中具有良好的应用前景。
A new catalyst support, polyoxometalate-modified carbon nanotubes, is presented in this paper through the chemisorption between polyoxometalate and carbon. Pt and Pt-Ru nanoparticles were electrochemically deposited on polyoxometalate-modified carbon nanotubes electrodes, and their electrocatalytic properties for methanol electro-oxidation are investigated in detail. Due to the unique electrical properties of carbon nanotubes and the excellent redox properties and the high protonic conductivity of polyoxometalate, for the similar deposition charge of Pt and Pt-Ru catalysts, 1.4 times larger exchange current density, 1.5 times higher specific activity, and better cycle stabilities can be obtained at polyoxometalate-modified carbon nanotube electrodes as compared to the electrodes without polyoxometalate modification. These results show that polyoxometalate-modified carbon nanotubes as a new catalyst support have good potential application in direct methanol fuel cells.