Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (4): 20230480.doi: 10.7503/cjcu20230480

• Physical Chemistry • Previous Articles     Next Articles

Fe-promoted Pt@CeO2 Catalysts for CO2 Hydrogenation to C1 Products

WANG Zijian1,2, LI Yuou1,2, ZHANG Lingling1,2, WANG Xiao1,2(), SONG Shuyan1,2(), ZHANG Hongjie1,2,3()   

  1. 1.State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
    2.School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China
    3.Department of Chemistry,Tsinghua University,Beijing 100084,China
  • Received:2023-11-20 Online:2024-04-10 Published:2024-01-13
  • Contact: WANG Xiao, SONG Shuyan, ZHANG Hongjie E-mail:wangxiao@ciac.ac.cn;songsy@ciac.ac.cn;hongjie@ciac.ac.cn
  • Supported by:
    the National Science and Technology Major Project of China(2021YFB3500700);the National Natural Science Foundation of China(22020102003);the Program of Science and Technology Development Plan of Jilin Province, China(20230101035JC)

Abstract:

Transition metal promoters were introduced on the surface of the Pt@CeO2 core@shell nanospheres, and the effects of different transition metals on the CO2 hydrogenation performance were investigated. The results show that the introduction of Fe species has the best effect on the enhancement of the hydrogenation performance, with a liquid C1 yield of 6.34×10-2 mmol·gcat.-1·h-1. Transmission electron microscopy(TEM), X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), N2 adsorption-desorption experiments, CO2 temperature-programmed desorption(CO2-TPD), and H2 temperature-programmed reduction(H2-TPR) experiments reveal that Fe promoter was dispersed on the surface of Pt@CeO2, and Fe promoter decreases the charge density of Pt, generating more Pt2+ species and improving the selectivity of methanol. In addition, it also facilitates the formation of more oxygen vacancies(Ov), which in turn facilitate the adsorption of CO2 as well as the subsequent hydrogenation reaction, and improve the catalytic activity.

Key words: CO2 hydrogenation, C1 product, Core@shell nanospheres, Fe promoter

CLC Number: 

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