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Geometric art of a Ni@silica nano-capsule catalyst with superb methane dry reforming stability: enhanced confinement effect over nickel site anchoring inside capsule shell with appropriate inner cavity

Abstract

Catalysts deactivation via severe carbon deposition and metal sintering is a significant obstacle for the industrialization of CO2 reforming of methane (CRM). Previous reports are mainly focused on metal oxides supported catalysts, which were proved to be less effective to eliminate the formation of carbon deposition completely. Here, we report a facile strategy for the preparation of a highly-dispersed Ni@SiO2 nano-capsule catalyst, which is featured with monodispersed capsule and anchored Ni NPs in the inner porous shell. By virtue of this, carbon formation could be sterically hindered due to the sealed space for carbon formation and growth, therefore excellent catalytic performance was achieved. Through comprehensive characterizations and comparison of traditional supported catalysts as well as capsule catalysts with different architectures, the importance of confined capsule structure in preventing carbon formation was convincingly demonstrated. Our work disclosed a morphologic approach that is much more effective in avoiding sintering of Ni NPs and suppressing carbon formation simultaneously, therefore shed new lights on the designing and preparation of highly stable Ni-based catalysts for reforming reactions.

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Publication details

The article was received on 05 Jun 2018, accepted on 30 Jul 2018 and first published on 31 Jul 2018


Article type: Paper
DOI: 10.1039/C8CY01158C
Citation: Catal. Sci. Technol., 2018, Accepted Manuscript
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    Geometric art of a Ni@silica nano-capsule catalyst with superb methane dry reforming stability: enhanced confinement effect over nickel site anchoring inside capsule shell with appropriate inner cavity

    C. Wang, Y. Qiu, X. Zhang, Y. Zhang, N. Sun and Y. Zhao, Catal. Sci. Technol., 2018, Accepted Manuscript , DOI: 10.1039/C8CY01158C

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