Comparative investigation of CO2 and oxygen reduction on Fe/N/C catalysts

被引：13

作者：

Yang, Hui-Juan ^{[1
]}

Dong, Jiao ^{[1
]}

Hong, Yu-Hao ^{[1
]}

Lin, Wen-Feng ^{[2
]}

Zhou, Zhi-You ^{[1
]}

Sun, Shi-Gang ^{[1
]}

机构：

[1] Xiamen Univ, Coll Chem & Chem Engn, Innovat Ctr Chem Energy Mat, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

[2] Loughborough Univ, Dept Chem Engn, Loughborough LE11 3TU, Leics, England

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2018年 / 97卷

基金：

中国国家自然科学基金;

关键词：

CO2; reduction; O-2 reduction reaction; Fe/N/C catalysts; N species; Electrocatalysis; CARBON NANOTUBE ARRAYS; ELECTROCATALYTIC REDUCTION; EFFICIENT REDUCTION; ACTIVE-SITES; NITROGEN; DEFECTS; ELECTROREDUCTION; ALKALINE;

D O I：

10.1016/j.elecom.2018.10.014

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Fe/N/C catalysts have been investigated as promising non-noble metal catalysts for both CO2 reduction reaction (CO2RR) and oxygen reduction reaction (ORR). However, it is unclear whether both reactions hold the same active sites. In this study, the Fe/N/C catalysts were subjected to oxidation treatment in O-2 at different temperatures to tune the reactivity. It was found that the oxidation treatment exhibits inverse effects on the CO2RR and ORR. The CO2RR activity was enhanced while ORR activity was suppressed after the oxidation treatment at temperatures from 80 to 240 degrees C. This result indicates that CO2RR and ORR occur at different active sites. Furthermore, it was evidenced that pyrrolic N increases significantly upon the oxidation treatment, similar to the variation tendency of the CO2RR activity, which suggests that pyrrolic N is highly relevant to the CO2RR on Fe/ N/C catalysts.

引用

页码：82 / 86

页数：5

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