Single-wall carbon nanotubes supported platinum nanoparticles with improved electrocatalytic activity for oxygen reduction reaction
Single-wall carbon nanotubes supported platinum nanoparticles with improved electrocatalytic activity for oxygen reduction reaction
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DOI：
10.1021/la052753a
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发表时间：
2006-02-28
期刊：
影响因子：
3.9
通讯作者：
Kamat, P
中科院分区：
文献类型：
--
作者：
Kongkanand, A;Kuwabata, S;Kamat, P
通过将Pt颗粒沉积在单壁碳纳米管（SWCNT）载体上，实现了Pt颗粒对氧还原反应（ORR）的电催化活性的显著增强。与商业Pt/炭黑催化剂相比，Pt/SWCNT膜浇铸在旋转盘电极上表现出较低的起始电位和较高的氧还原电子转移速率常数。SWCNT载体的改进的稳定性也从在36小时的时间内重复循环期间氧还原电流的最小变化得到证实。这些研究开辟了利用单壁碳纳米管/铂电催化剂作为阴极的质子交换膜为基础的氢和甲醇燃料电池。
Significant enhancement in the electrocatalytic activity of Pt particles toward oxygen reduction reaction (ORR) has been achieved by depositing them on a single wall carbon nanotubes (SWCNT) support. Compared to a commercial Pt/carbon black catalyst, Pt/SWCNT films cast on a rotating disk electrode exhibit a lower onset potential and a higher electron-transfer rate constant for oxygen reduction. Improved stability of the SWCNT support is also confirmed from the minimal change in the oxygen reduction current during repeated cycling over a period of 36 h. These studies open up ways to utilize SWCNT/Pt electrocatalyst as a cathode in the proton-exchange-membrane-based hydrogen and methanol fuel cells.