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Title: Fabricating core-shell WC@C/Pt structures and its enhanced performance for methanol electrooxidation
Authors: Chen, Zhao-Yang
Duan, Long-Fa
Chu, You-Qun
Sheng, Jiang-Feng
Lin, Wen-Feng
Ma, Chun-An
Keywords: Self-disperse
Core-shell structure
Tungsten carbide
Methanol oxidation
Issue Date: 2017
Publisher: © Chinese Physical Society
Citation: CHEN, Z-Y. ...et al., 2017. Fabricating core-shell WC@C/Pt structures and its enhanced performance for methanol electrooxidation. Chinese Journal of Chemical Physics, 30(4), pp. 450-456.
Abstract: © 2017 Chinese Physical Society. The spray-dried spheres within a W/Pt multi-separation can be used to prepare discrete core-shell WC@C/Pt catalysts through a typical carburization production mechanism at 800 °C. In contrast with previous studies of the WC/Pt synthesis, the reaction observed here proceeds through an indirect annealing mechanism at 600 °C wherein species diffuse, thereby resulting in core-shell structure, and Pt nanoparticles were successfully dispersed in size/shape and randomly scattered across the in situ produced C spheres. Through direct carburization or at higher initial hydrochloroplatinic acid concentrations, however, complete reaction with core-shell spheres was not observed. Indirect carburization reduces the strain felt by the bonds featuring the larger WC particles and allows the motion of carbon around WC and Pt nanoparticles to be reserved, influencing the electrocatalytic performance and stability toward methanol oxidation.
Description: This paper is in closed access until Aug 27th 2018.
Sponsor: This work is supported by the International Science & Technology Cooperation Program of China (No.2010DFB63680), the Natural Science Foundation of Zhejiang Province LQ15B030004) and Loughborough University and the EPSRC (EP/I013229/1).
Version: Published
DOI: 10.1063/1674-0068/30/cjcp1703026
URI: https://dspace.lboro.ac.uk/2134/28465
Publisher Link: https://doi.org/10.1063/1674-0068/30/cjcp1703026
ISSN: 1674-0068
Appears in Collections:Closed Access (Chemical Engineering)

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