Selective CO Evolution from Photoreduction of CO2 on a Metal-Carbide-Based Composite Catalyst

Yu Long Men, Ya You, Yun Xiang Pan*, Hongcai Gao, Yang Xia, Dang Guo Cheng, Jie Song, Da Xiang Cui, Nan Wu, Yutao Li, Sen Xin, John B. Goodenough

*Corresponding author for this work

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Abstract

A selective CO evolution from photoreduction of CO2 in water was achieved on a noble-metal-free, carbide-based composite catalyst, as demonstrated by a CO selectivity of 98.3% among all carbon-containing products and a CO evolution rate of 29.2 μmol h-1, showing superiority to noble-metal-based catalyst. A rapid separation of the photogenerated electron-hole pairs and improved CO2 adsorption on the surface of the carbide component are responsible for the excellent performance of the catalyst. The high CO selectivity is accompanied by a predominant H2 evolution, which is believed to provide a proton-deficient environment around the catalyst to favor the formation of hydrogen-deficient carbon products. The present work provides general insights into the design of a catalyst with a high product selectivity and also the carbon evolution chemistry during a photocatalytic reaction.

Original languageEnglish
Pages (from-to)13071-13077
Number of pages7
JournalJournal of the American Chemical Society
Volume140
Issue number40
DOIs
Publication statusPublished - 10 Oct 2018
Externally publishedYes

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Men, Y. L., You, Y., Pan, Y. X., Gao, H., Xia, Y., Cheng, D. G., Song, J., Cui, D. X., Wu, N., Li, Y., Xin, S., & Goodenough, J. B. (2018). Selective CO Evolution from Photoreduction of CO2 on a Metal-Carbide-Based Composite Catalyst. Journal of the American Chemical Society, 140(40), 13071-13077. https://doi.org/10.1021/jacs.8b08552