Electrocatalysis of Oxygen Reduction Reaction on Carbon Nanotubes Modified by Graphitization and Amination

被引：11

作者：

Zhang, Hui-Juan ^{[1
]}

Li, Haoliang ^{[1
]}

Deng, Chengcheng ^{[1
]}

Zhao, Bin ^{[1
]}

Yang, Junhe ^{[1
]}

机构：

[1] Univ Shanghai Sci & Technol, Sch Mat Sci & Engn, Shanghai 200093, Peoples R China

来源：

ECS ELECTROCHEMISTRY LETTERS | 2015年 / 4卷 / 08期

基金：

美国国家科学基金会;

关键词：

METAL-FREE ELECTROCATALYSTS; SURFACE FUNCTIONAL-GROUPS; NITROGEN; ELECTRODES; CATALYST; ACID;

D O I：

10.1149/2.0041508eel

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Multi-walled carbon nanotubes (MWCNTs) as well as MWCNTs modified by amino-functional group (MWCNTs-NH2) and graphitization (MWCNTs-G) are studied for the oxygen reduction reaction (ORR) by using cyclic voltammograms and rotating ring disk electrode techniques. Electrochemical results indicate that in alkaline electrolyte, the ORR electrocatalytic activity and selectivity isMWCNTs> MWCNTs-NH2 > MWCNTs-G; while in acid medium, it isMWCNTs-NH2 > MWCNTs> MWCNTs-G. Raman data show that the degree of defect (I-D/I-G) is MWCNTs (1.41) > MWCNTs-NH2 (1.39) >> MWCNTs-G (0.54). Possible interpretation on the difference order of the ORR electrocatalytic activity and selectivity is also discussed. (c) 2015 The Electrochemical Society. All rights reserved.

引用

页码：H33 / H37

页数：5

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