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

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posted on 2018-10-23, 12:07 authored by Hui-Juan Yang, Jiao Dong, Yu-Hao Hong, Wen-Feng LinWen-Feng Lin, Zhi-You Zhou, Shi-Gang Sun
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 O2 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 °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.

Funding

This study was supported by grants from National Key Research and Development Program of China (2016YFB0101202), National Natural Science Foundation of China (91645121 and 21621091), Fundamental Research Funds for the Central Universities (20720150109) and Loughborough University (H10841).

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

Electrochemistry Communications

Volume

97

Pages

82-86

Citation

YANG, H-J. ... et al, 2018. Comparative investigation of CO2 and oxygen reduction on Fe/N/C catalysts. Electrochemistry Communications, 97, pp.82-86.

Publisher

© Elsevier

Version

  • AM (Accepted Manuscript)

Publisher statement

This paper was accepted for publication in the journal Electrochemistry Communications and the definitive published version is available at https://doi.org/10.1016/j.elecom.2018.10.014

Acceptance date

2018-10-15

Publication date

2018-10-16

Copyright date

2018

ISSN

1388-2481

Language

  • en

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