Selective Photocatalytic Reduction of CO2 to Syngas Over Tunable Metal-Perovskite Interface

Zhang Li; Yanling Yang; Jinshu Tian; Jianhui Li; Gui Chen; Liujiang Zhou; Yifei Sun; Yongfu Qiu

doi:10.1002/cssc.202102729

Selective Photocatalytic Reduction of CO₂ to Syngas Over Tunable Metal-Perovskite Interface

ChemSusChem. 2022 Mar 22;15(6):e202102729. doi: 10.1002/cssc.202102729. Epub 2022 Feb 23.

Authors

Zhang Li^{1

2}, Yanling Yang^{1

2}, Jinshu Tian³, Jianhui Li⁴, Gui Chen¹, Liujiang Zhou⁵, Yifei Sun², Yongfu Qiu¹

Affiliations

¹ School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, Guangdong, 523808, P.R. China.
² College of Energy, Xiamen University, Xiamen, 361005, P.R. China.
³ College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
⁴ Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P.R. China.
⁵ School of Physics, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.

PMID: 35102710
DOI: 10.1002/cssc.202102729

Abstract

The extensive emission of CO₂ results in critical environmental issues, such as global warming. Photocatalytic CO₂ conversion is a meaningful route to convert CO₂ into useful chemicals. However, the highly selective reduction of CO₂ with the avoidance of hydrogen evolution is still challenging. Herein, the photocatalytic reduction CO₂ to synthesis gas (syngas) was achieved on a metal Ag socketed perovskite LaFeO₃ (LFO) catalytic interface prepared by an in-situ exsolution method. The conduction band of Ag-exsolved LFO is more negative than LFO, benefiting efficient CO₂ reduction. By tuning the dopant Ag cation in the lattice to nanoparticles pinned on the surface, the CO formation rate was improved around five-fold from 0.51 to 2.41 μmol g^-1 h^-1 . Meanwhile, the H₂ /CO molar ratio also showed strong dependence on the modality of Ag at the metal-perovskite interface. The design offers a promising pathway for transforming CO₂ to valuable chemicals based on efficient photocatalysts design.

Keywords: Ag; CO2 reduction; carbon dioxide fixation; exsolution; photocatalysis.

Abstract

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