Electrocatalysis of oxygen reduction reaction on carbon nanotubes modified by graphitization and amination
Electrocatalysis of oxygen reduction reaction on carbon nanotubes modified by graphitization and amination
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石墨化和胺化改性碳纳米管电催化氧还原反应
DOI：
10.1149/2.0041508eel
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发表时间：
2015
影响因子：
--
通讯作者：
Yang Junhe
中科院分区：
文献类型：
--
作者：
Zhang Hui-Juan;Li Haoliang;Deng Chengcheng;Zhao Bin;Yang Junhe
采用循环伏安法和旋转环盘电极技术研究了多壁碳纳米管（MWCNTs）、氨基改性MWCNTs（MWCNTs-NH 2）和石墨化改性MWCNTs（MWCNTs-G）的氧还原反应（ORR）.电化学结果表明，在碱性电解液中，电催化氧化还原活性和选择性为MWCNTs> MWCNTs-NH 2> MWCNTs-G，而在酸性电解液中，电催化氧化还原活性和选择性为MWCNTs-NH 2> MWCNTs> MWCNTs-G。拉曼光谱数据表明，缺陷度（ID/IG）为MWCNTs（1.41）> MWCNTs-NH 2（1.39）> MWCNTs-G（0.54）。对ORR电催化活性和选择性的不同阶数的可能解释进行了讨论。
Multi-walled carbon nanotubes (MWCNTs) as well as MWCNTs modified by amino-functional group (MWCNTs-NH 2) 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-NH 2> MWCNTs-G; while in acid medium, it is MWCNTs-NH 2> MWCNTs> MWCNTs-G. Raman data show that the degree of defect (I D/I G) is MWCNTs (1.41)> MWCNTs-NH 2 (1.39)≫ MWCNTs-G (0.54). Possible interpretation on the difference order of the ORR electrocatalytic activity and selectivity is also discussed.