Carbon nanocapsules as an electrocatalyst support for the oxygen reduction reaction in alkaline electrolyte

被引：8

作者：

Lin, Y. M. ^{[1
]}

Chang, Y. M. ^{[1
]}

Wu, P. W. ^{[1
]}

Lin, P. ^{[1
]}

Li, Y. Y. ^{[2
]}

Wu, C. Y. ^{[1
]}

Tsai, C. F. ^{[1
]}

Yeh, K. Y. ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan

[2] Natl Chung Cheng Univ, Dept Chem Engn, Chiayi 621, Taiwan

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2008年 / 38卷 / 04期

关键词：

alkaline fuel cell; carbon nanocapsules; gas diffusion electrode; electrocatalyst; oxygen reduction reaction;

D O I：

10.1007/s10800-007-9465-3

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Carbon Nanocapsules (CNCs) were investigated for their electrocatalytic performances for the oxygen reduction reaction in alkaline electrolyte. With an average diameter of 10-30 nm, the CNCs are composed of graphene layers encapsulating a hollow core. A gas diffusion electrode (GDE) made of CNCs revealed a much enhanced i-V polarization response than that of Vulcan XC72. However, its performance was moderately lower than that of Black Pearls 2000. In addition, the CNCs were impregnated with nanoparticles of Ag, MnOx and CoOx . The i-V and galvanostatic results of the catalyzed CNCs indicated significant improvements over that of noncatalyzed CNCs. For example, a Ag-CNC derived GDE was capable of delivering 1.03 and 0.88 V at current densities of 100 and 200 mA cm(-2), respectively. Our study offers direct evidence that the CNCs not only exhibit unique electrocatalytic abilities but also function superbly as an electrocatalyst support.

引用

页码：507 / 514

页数：8

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