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Fabricating Core-Shell WC@C/Pt Structures and its Enhanced Performance for Methanol Electrooxidation
Zhao-yang Chen*,Long-fa Duan,You-qun Chu*,Jiang-feng Sheng,Wen-feng Lin,Chun-an Ma
Author NameAffiliationE-mail
Zhao-yang Chen*  chenzhy@zjut.edu.cn 
Long-fa Duan   
You-qun Chu*  chuyq@zjut.edu.cn 
Jiang-feng Sheng   
Wen-feng Lin   
Chun-an Ma   
Abstract:
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℃. In contrast with previous studies of the WC/Pt synthesis, the reaction observed here proceeds through an indirect annealing mechanism at 600℃ 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.
Key words:  Self-disperse  Core-shell structure  Carbon-resist  Tungsten carbide  Methanol oxidation
FundProject: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).
核壳结构WC@C/Pt复合材料的构建及其对甲醇的高电催化氧化活性
陈赵扬*,段隆发,褚有群*,盛江峰,林文锋,马淳安
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DOI:10.1063/1674-0068/30/cjcp1703026
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