Citation: ZHOU Yang, HU Xian-chao, LIU Xi-hui, QU Hui-nan, WEN He-rui, YU Chang-lin. Performance of platinum nanoparticles supported on hollow mesoporous tungsten trioxide microsphere as an electrocatalyst for methanol oxidation[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(2): 251-256. shu

Performance of platinum nanoparticles supported on hollow mesoporous tungsten trioxide microsphere as an electrocatalyst for methanol oxidation

ZHOU Yang ^1,2 ,
HU Xian-chao ^3,, ,
LIU Xi-hui ² ,
QU Hui-nan ² ,
WEN He-rui ^1,2 ,
YU Chang-lin ²

1.
1. Engineering Research Center of High-Efficiency Development and Application Technology of Tungsten Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China;

Corresponding author: HU Xian-chao,
Received Date: 4 August 2014
Available Online: 22 October 2014
Fund Project: 国家自然科学基金(51404110, 21263005) (51404110, 21263005) 赣鄱英才555工程, 江西省博士后择优资助项目基金(2014zy15) (2014zy15) 江西理工大学科研基金(NSFJ2014-G08)。 (NSFJ2014-G08)

Hollow dendritic mesoporous tungsten trioxide (d-WO₃) was synthesized by combining the hydrothermal method with the template-sacrificing method; with d-WO₃ as a support, Pt/d-WO₃ catalyst was prepared through an improved liquid phase reduction method. The Pt/d-WO₃ catalyst was characterized by XRD, BET and TEM and its electrocatalytic activity and stability towards methanol electro-oxidation were investigated by cyclic voltammetry and chronoamperometry. The results indicated that d-WO₃ exhibits hollow microsphere dendritic structure with a length of 6 μm and a width of 2 μm; Pt nanoparticles with a size of 7.2 nm were highly dispersed on the surface of d-WO₃. The nitrogen physisorption on d-WO₃ displays type IV isotherms, which are typical for the mesoporous materials. Moreover, d-WO₃ shows a BET surface area of 24 m²/g, with a large number of pores around 20~120 nm. The as-prepared Pt/d-WO₃ catalyst exhibits higher electrocatalytic activity and better stability in methanol electro-oxidation in comparison with the Pt/WO₃ and Pt/C catalysts. The enhanced catalytic performance of Pt/d-WO₃ is attributed to its unique hollow mesoporous structure and the double function, which greatly accelerates the dehydrogenation of methanol on Pt.
- direct methanol fuel cell,
- methanol electro-oxidation,
- tungsten trioxide,
- platinum supported catalyst,
- electro-catalysis
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