Influences of doping Cr/Fe/Ta on the performance of Ni/CeO₂ catalyst under microwave irradiation in dry reforming of CH₄
Date
2016
Authors
Odedairo, T.
Ma, J.
Chen, J.
Wang, S.
Zhu, Z.
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Journal of Solid State Chemistry, 2016; 233:166-177
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The structure of Ni/CeO2 catalyst with doping of Cr, Fe and Ta was investigated with XRD, N2 physisorption, XPS and HRTEM and the catalytic activity of the catalysts under microwave irradiation in dry reforming of methane was tested in a microwave reactor. The results show that the introduction of Cr and Ta to Ni/CeO2 can enhance the interaction between Ni and the support/promoter and inhibit the enlargement of NiO particles during the synthesis. The CH4 conversions in dry reforming on the catalysts follow the order: Ni/CeO2<2Fe–Ni<2Ta–Ni<2Cr–Ni. The superior performance of 2Ta–Ni and 2Cr–Ni may be attributed to the locally-heated Ni particles caused by the strong microwave absorption of the in-situ grown graphene attached on them under microwave irradiation.
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Copyright 2015 Elsevier