Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (11): 20230308.doi: 10.7503/cjcu20230308

• Physical Chemistry • Previous Articles     Next Articles

Promotional Effect of Ni-Co/TiO2 Catalysts on CO2 Hydrogenation

WANG Zhaoyu(), CHEN Yibin, CHENG Jintian, ZHANG Mingwen   

  1. Fujian Provincial Key Lab of Coastal Basin Environment,Fujian Polytechnic Normal University,Fuqing 350000,China
  • Received:2023-06-30 Online:2023-11-10 Published:2023-09-11
  • Contact: WANG Zhaoyu E-mail:1058238843@qq.com
  • Supported by:
    the Natural Science Foundation of Fujian Province, China(2020J05244)

Abstract:

The Ni-Co/TiO2 catalysts were synthesized via an excess-solution impregnation method and fully characterized XRD, FESEM, EDS, TEM, XPS and N2 adsorption-desorption tests. In CO2 hydrogenation reaction for 3 h, Ni-Co/TiO2 catalyst exhibited a CH4 production of 84.4 μmol, which was enhanced by 46.3%, compared with Ni/TiO2. Results of CO2-TPD and H2-TPR demonstrated that the introduced Co can facilitate the adsorption and activation of CO2 molecules to contribute to the CO2 hydrogenation reaction. In the activity stability tests for 5 cycles, the yield of CH4 was reduced by 20.5% over Ni/TiO2, while that over Ni-Co/TiO2 was only by 10.9%, revealing that the introduced Co can also enhance the catalytic stability for the reaction. This study may provide some guidance for the design and synthesis of high-efficiency catalysts for CO2 hydrogenation.

Key words: CO2 hydrogenation reaction, Ni-Co/TiO2, CO2 adsorption, CO2 activation, CH4

CLC Number: 

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