Ethyne Reducing Metal-Organic Frameworks to Control Fabrications of Core/shell Nanoparticles as Catalysts


An approach using cobalt metal-organic frameworks (Co-MOF) as precursors is established for the fabrication of cobalt nanoparticles in porous carbon shells (core/shell Co@C). Chemical vapor deposition of ethyne is used for controlling the reduction of cobalt nanoclusters in the MOF and the spontaneous formation of the porous carbon shells. The metallic cobalt cores formed are up to 4 - 6 nm with the crystal phase varying between hexagonally-close-packed (hcp) and face-centre-packed (fcc). The porous carbon shells change from amorphous to graphene with the ethyne deposition temperature increasing from 400 to 600 oC. The core/shell Co@C nanoparticles exhibit high catalytic activity in selectively converting syngas (CTY: 254.1 - 312.1 μmolCO·gCo-1·s-1) into hydrocarbons (4.0 - 5.2 gHC·g-cat-1·h-1) at 260 oC. As well as the crystal size and phase, the coordination numbers of the cobalt to oxygen and to other cobalt atoms on the surface of the cobalt nanoparticles, and the permeability of the porous carbon shell have been related to the catalytic performance in FTS reactions.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Chemical Engineering & Applied Chemistry
College of Engineering & Physical Sciences > Aston Institute of Materials Research (AIMR)
College of Engineering & Physical Sciences > Energy and Bioproducts Research Institute (EBRI)
Additional Information: Copyright © 2018 American Chemical Society
Publication ISSN: 2155-5435
Full Text Link:
Related URLs: ... cscatal.8b01691 (Publisher URL)
PURE Output Type: Article
Published Date: 2018-08-03
Published Online Date: 2018-06-20
Accepted Date: 2018-04-30
Authors: Zhang, Chenghua
Guo, Xiaoxue
Yuan, Qingchun (ORCID Profile 0000-0001-5982-3819)
Zhang, Rongle
Change, Qiang
Li, Ke
Xiao, Bo
Liu, Suyao
Ma, Caiping
Liu, Xi
Xu, Yiqun
Wen, Xiadong
Yang, Yong
Li, Yongwang



Version: Accepted Version

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