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Issue 13, 2019
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Topologically immobilized catalysis centre for long-term stable carbon dioxide reforming of methane

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Abstract

Methane reforming at low temperatures is of growing importance to mitigate the environmental impact of the production of synthesis gas, but it suffers from short catalyst lifetimes due to the severe deposition of carbon byproducts. Herein, we introduce a new class of topology-tailored catalyst in which tens-of-nanometer-thick fibrous networks of Ni metal and oxygen-deficient Y2O3 are entangled with each other to form a rooted structure, i.e., Ni#Y2O3. We demonstrate that the rooted Ni#Y2O3 catalyst stably promotes the carbon-dioxide reforming of methane at 723 K for over 1000 h, where the performance of traditional supported catalysts such as Ni/Y2O3 diminishes within 100 h due to the precluded mass transport by accumulated carbon byproducts. In situ TEM demonstrates that the supported Ni nanoparticles are readily detached from the support surface in the reaction atmosphere, and migrate around to result in widespread accumulation of the carbon byproducts. The long-term stable methane reforming over the rooted catalyst is ultimately attributed to the topologically immobilized Ni catalysis centre and the synergistic function of the oxygen-deficient Y2O3 matrix, which successfully inhibits the accumulation of byproducts.

Graphical abstract: Topologically immobilized catalysis centre for long-term stable carbon dioxide reforming of methane

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Publication details

The article was received on 07 Nov 2018, accepted on 12 Feb 2019 and first published on 13 Feb 2019


Article type: Edge Article
DOI: 10.1039/C8SC04965C
Chem. Sci., 2019,10, 3701-3705
  • Open access: Creative Commons BY-NC license
    All publication charges for this article have been paid for by the Royal Society of Chemistry

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    Topologically immobilized catalysis centre for long-term stable carbon dioxide reforming of methane

    S. Shoji, X. Peng, T. Imai, P. S. Murphin Kumar, K. Higuchi, Y. Yamamoto, T. Tokunaga, S. Arai, S. Ueda, A. Hashimoto, N. Tsubaki, M. Miyauchi, T. Fujita and H. Abe, Chem. Sci., 2019, 10, 3701
    DOI: 10.1039/C8SC04965C

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