Electrocatalysis of Oxygen Reduction Reaction on Carbon Nanotubes Modified by Graphitization and Amination. (2nd June 2015)

• Record Type: Journal Article
• Authors: Zhang, Hui-Juan; Li, Haoliang; Deng, Chengcheng; Zhao, Bin; Yang, Junhe
• Is Part Of: ECS Electrochemistry Letters. Volume 4:Number 8(2015)
• Page Start: H33
• Page End: H37
• Publication Date: 2015-06-02
• Subjects: amination -- carbon nanotubes -- Electrocatalyst -- graphitization -- Oxygen reduction reaction
• DOI: 10.1149/2.0041508eel
• Languages: English
• ISSNs: 2162-8726

Abstract

Abstract : 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 is MWCNTs > MWCNTs-NH2 > MWCNTs-G; while in acid medium, it is MWCNTs-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.