Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (5): 1286-1294.DOI: 10.1016/S1872-2067(21)63954-2

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Multidimensional In2O3/In2S3 heterojunction with lattice distortion for CO2 photoconversion

Jinman Yanga, Xingwang Zhua, Qing Yua, Minqiang Hea, Wei Zhanga, Zhao Moa, Junjie Yuana, Yuanbin Sheb, Hui Xua(), Huaming Lia()   

  1. aSchool of Chemistry and Chemical Engineering, Institute of Energy Research, Jiangsu University, Zhenjiang 212013, Jiangsu, China
    bCollege of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China
  • Received:2021-08-20 Accepted:2021-09-27 Online:2022-05-18 Published:2022-03-23
  • Contact: Hui Xu, Huaming Li
  • Supported by:
    National Natural Science Foundation of China(22075113);National Natural Science Foundation of China(22178152);National Natural Science Foundation of China(22172066);National Natural Science Foundation of China(51902138);Natural Science Foundation of Jiangsu Province(BK20190835);High-tech Research Key Laboratory of Zhenjiang(SS2018002);Jiangsu Provincial Agricultural Science and Technology Independent Innovation Fund(CX(21)3067);National Natural Science Foundation of China(22138011);China Postdoctoral Science Foundation(2021M691305);Jiangsu Postdoctoral Science Foundation(2021K079A)

Abstract:

Photocatalytic CO2 reduction to sustainably product of fuels is a potential route to achieve clean energy conversion. Unfortunately, the sluggish charge transport dynamics and poor CO2 activation performance result in a low CO2 conversion efficiency. Herein, we develop a multidimensional In2O3/In2S3 (IO/IS) heterojunction with abundant lattice distortion structure and high concentration of oxygen defects. The close contact interfaces between the junction of the two phases ensure undisturbed transmission of electrons with high-speed. The increased free electron concentration promotes the adsorption and activation of CO2 on the catalyst surface, leaving the key intermediate *COOH at a lower energy barrier. The perfect combination of the band matching oxide and sulfide effectively reduces the internal energy barrier of the CO2 reduction reaction. Furthermore, the lattice distortion structure not only provides additional active sites, but also optimizes the kinetics of the reaction through microstructural regulation. Remarkably, the optimal IO/IS heterojunction exhibits superior CO2 reduction performance with CO evolution rate of 12.22 μmol g-1 h-1, achieving about 4 times compared to that of In2O3 and In2S3, respectively. This work emphasizes the importance of tight interfaces of heterojunction in improving the performance of CO2 photoreduction, and provides an effective strategy for construction of heterojunction photocatalysts.

Key words: Photocatalysis, CO2 conversion, In2O3/In2S3 heterojunction, Interface, Lattice distortion