Citation:
SUN Shuai-Qi, YI Yan-Hui, WANG Li, ZHANG Jia-Liang, GUO Hong-Chen. Preparation and Performance of Supported Bimetallic Catalysts for Hydrogen Production from Ammonia Decomposition by Plasma Catalysis[J]. Acta Physico-Chimica Sinica,
;2017, 33(6): 1123-1129.
doi:
10.3866/PKU.WHXB201703301
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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.
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Keywords:
- Plasma,
- Fe-Ni,
- Bimetallic catalysts,
- Ammonia decomposition,
- Hydrogen
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