Journal
KINETICS AND CATALYSIS
Volume 58, Issue 6, Pages 800-808Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S0023158418010123
Keywords
Ni@CeO2 core-shell catalyst; dry reforming of methane; stability; carbon-resistance
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Funding
- National Natural Science Foundation of China [21606026, 21776025]
- Graduate Scientific Research and Innovation Foundation of Chongqing, China [CYB15046]
- Chongqing Science and Technology Commission [CSTC2013j-cyA0348]
- Fundamental Research Funds for the Central Universities [106112017CDJXY220005, 106112017CDJXF220009, 106112017CDJPT220001, 106112017CDJQJ228809, 106112017CDJXFLX0014]
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Ni@CeO2 core-shell catalysts were synthesized via a facile surfactant-assisted hydrothermal method and their catalytic performance in the dry reforming of methane (DRM) reaction was evaluated. A variety of techniques including XRD, N-2 adsorption-desorption, SEM, TEM, TPO, TGA were employed to characterize the prepared or spent catalysts. The encapsulation by the CeO2 shell, on one side, can restrict the sintering and growth of Ni nanoparticles under harsh reaction conditions. On the other side, compared to the conventional shell material of SiO2, CeO2 can provide more lattice oxygens and vacancies, which is helpful to suppress coke deposition. Consequently, the Ni@CeO2 core-shell catalysts exhibited better catalytic activity and stability in the DRM reaction with respect to the referenced Ni@SiO2 core-shell catalysts and Ni/CeO2 supported catalysts.
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