Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (6): 1123-1129.doi: 10.3866/PKU.WHXB201703301

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Preparation and Performance of Supported Bimetallic Catalysts for Hydrogen Production from Ammonia Decomposition by Plasma Catalysis

Shuai-Qi SUN1,Yan-Hui YI1,Li WANG1,Jia-Liang ZHANG2,Hong-Chen GUO1,*()   

  1. 1 State Key Laboratory of Fine Chemicals, Department of Catalytic Chemistry and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning Province, P. R. China
    2 School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116024, Liaoning Province, P. R. China
  • Received:2017-02-28 Published:2017-05-19
  • Contact: Hong-Chen GUO E-mail:hongchenguo@163.com
  • Supported by:
    The project was supported by the National Natural Science Foundation of China(20473016);The project was supported by the National Natural Science Foundation of China(20673018)

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Abstract:

Bimetallic Fe-Co, Fe-Ni, Mo-Co, and Mo-Ni catalysts, with total metal contents of 10 wt% and bimetallic molar ratios of 1:1, were prepared by the incipient wetness impregnation method and their activities for ammonia decomposition in the presence of plasma were studied. The Fe-Ni bimetallic catalyst exhibited a better synergistic effect than the other three bimetallic catalysts. The effect of the Fe/Ni molar ratio on its catalytic activity was also investigated. A 6:4 Fe/Ni molar ratio resulted in the highest ammonia decomposition activity and stability. The catalysts were characterized by N2 adsorption-desorption, XRD, H2-TPR, and HRTEM. The characterization results indicated that NiFe2O4 with a spinel structure was formed in the optimal Fe-Ni bimetallic catalysts and this structure favors the reduction of Fe and Ni. In other words, it is easy to achieve the metallic state of active components for the Fe-Ni bimetallic catalysts, which could be the reason for the high catalytic activity of bimetallic catalysts for NH3 decomposition.

Key words: Plasma, Fe-Ni, Bimetallic catalysts, Ammonia decomposition, Hydrogen