Photocatalytic conversion of carbon monoxide: from pollutant removal to fuel production

Document Type

Article

Publication Date

10-15-2021

Department

Department of Materials Science and Engineering

Abstract

Removal of low-concentration CO in the atmosphere and conversion of concentrated CO into energy fuels with a low energy input are critically important for our sustainable development. Photocatalysis is a promising technology to realize the processes. For different usage scenarios, toxic CO has been eliminated by photo-catalytically oxidizing it into environmental-benign CO with O or NO. Meanwhile, photocatalytic reactions between CO and H O as well as CO and H have been proven effective to convert CO into value-added energy fuels. To stimulate the practical application of photocatalysis for CO removal/conversion, a comprehensive review on these photo-driven processes is vital but now still lacking. Thereby, herein, an overview of the recent progresses in photocatalytic conversion of CO is presented with an emphasis on the catalyst designs, which is the key to the catalytic efficiency. Specifically, the characteristics, performances and working mechanisms of the typical catalysts for the various CO-related photocatalytic reactions are discussed. Besides the conventional photocatalysis at room temperature, photocatalytic reactions at elevated temperatures introduced by external heating (thermo-photo hybrid catalysis) or in situ photothermal conversion (photothermal catalysis), which have been receiving increasing attention, are included. Furthermore, the unresolved problems in this field are indicated along with our perspective on the future development.

Publication Title

Applied Catalysis B: Environmental

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