Efficient usage of highly dispersed Pt on carbon nanotubes for electrode catalysts of polymer electrolyte fuel cells
Efficient usage of highly dispersed Pt on carbon nanotubes for electrode catalysts of polymer electrolyte fuel cells
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DOI：
10.1016/j.cattod.2004.04.038
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发表时间：
2004-07-01
期刊：
影响因子：
5.3
通讯作者：
Nakamura, J
中科院分区：
文献类型：
--
作者：
Matsumoto, T;Komatsu, T;Nakamura, J
在低于500 mA/cm（2）的聚合物电解质燃料电池（PEFC）中，Pt沉积的碳纳米管（CNT）显示出比商业Pt沉积的炭黑（CB）更高的性能，每电极面积减少60%的Pt负载。K_2PtCl_4和H（2）PtCl（6）（.）6（H2O）用于Pt沉积到多壁碳纳米管（MWCNT），这是由烃的催化分解产生的。基于单位功率的Pt负载，使用Pt/CNT电极产生的电功率密度比Pt/CB的电功率密度大2至4倍。因此发现CNT是用于PEFC电极的Pt颗粒的良好载体。TEM图像显示2-4-nm的Pt纳米颗粒分散在CNT表面上。这些高性能被认为是由于气体-电极-电解质三相边界的有效形成。Pt沉积的机制进行了讨论，这些Pt沉积的碳纳米管。(C)2004 Elsevier B. V.保留所有权利。
A Pt-deposited carbon nanotube (CNT) shows higher performance than a commercial Pt-deposited carbon black (CB) with reducing 60% Pt load per electrode area in polymer electrolyte fuel cells (PEFCs) below 500mA/cm(2). K2PtCl4 and H(2)PtCl(6)(.)6(H2O) are used for the Pt deposition onto multi-walled CNTs (MWCNTs), which are produced by the catalytic decomposition of hydrocarbons. The electric power densities produced using the Pt/CNT electrodes are greater than that of the Pt/CB by a factor of two to four on the basis of the Pt load per power. CNTs are thus found to be a good support of Pt particles for PEFC electrodes. TEM images show 2-4-nm Pt nanoparticles dispersed on the CNT surfaces. These high performances are considered to be due to the efficient formation of the triple-phase boundaries of gas-electrode-electrolyte. The mechanisms of Pt deposition are discussed for these Pt-deposited CNTs. (C) 2004 Elsevier B.V. All rights reserved.