Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (11): 1976-1982.DOI: 10.1016/S1872-2067(21)63835-4

• Communications • Previous Articles     Next Articles

Photo-thermal CO2 reduction with methane on group VIII metals: In situ reduced WO3 support for enhanced catalytic activity

Huimin Liua,b,*(), Xianguang Mengb, Weiwei Yangc, Guixia Zhaob, Dehua Hec, Jinhua Yeb,#()   

  1. aSchool of chemical and environmental engineering, Liaoning University of Technology, Jinzhou 121001, Liaoning, China
    bInternational Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
    cInnovative Catalysis Program, Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, China
  • Received:2021-03-10 Accepted:2021-03-10 Online:2021-11-18 Published:2021-05-18
  • Contact: Huimin Liu,Jinhua Ye
  • About author:*Tel: +86-15810724205; E-mail: liuhuimin08@tsinghua.org.cn;
  • Supported by:
    National Natural Science Foundation of China(21902116)

Abstract:

Photo-thermal CO2 reduction with methane (CRM) is beneficial for solar energy harvesting and energy storage. The search for efficient photo-thermal catalysts is of great significance. Here, we reveal that group VIII metal catalysts supported by optical material WO3 are more effective for photo-thermal CRM, giving catalytic activities with visible light assistance that are 1.4-2.4 times higher than that achieved under thermal conditions. The activity enhancement (1.4-2.4 times) was comparable to that achieved with plasmonic-Au-promoted catalysts (1.7 times). Characterization results indicated that WO3 was partially reduced to WO3-x in situ under the reductive CRM reaction atmosphere, and that WO3-x rather than WO3 enhanced the activities with visible light assistance. Our method provides a promising approach for improving the activity of catalysts under light irradiation.

Key words: Tungsten oxide, Visible light, In situ reduction, Photocatalysis, CO2 reduction