A new biomass template to prepare multi-channel structure of WO3 and its application for methanol electro-oxidation

作者：Shi, Mei-Qin; Song, Guang-Hui; Yang, Pian-Pian; Chu, You-Qun; Ma, Chun-An^*

来源：Materials Letters, 2015, 153: 124-127.

DOI：10.1016/j.matlet.2015.04.014

• Biomaterial
• Multi-channel WO3
• Methanol electro-oxidation
• Electro-catalyst
• Microstructure

Reed was used as the template and its unique multi-channel structure was fully duplicated on the WO3 particles by simple impregnation and calcination. The prepared WO3 particles which have multi-channel structure ((mc)-WO3) were evaluated as a support for methanol electro-oxidation. 10 wt% Pt was loaded on the (mc)-WO3 support by employing microwave-assisted polyol strategy. The morphological characterizations suggest that Pt is homogeneously dispersed on (mc)-WO3 with an average size of 3.3 nm. Electrochemical studies indicate that the electro-catalytic performance of the synthesized catalyst is better for methanol electro-oxidation compared with that of commercial Pt/C. This improved activity can be attributed to the enhanced H-spillover effect caused by the increased interface between Pt and WO3 in the multi-channel structure of catalysts. It is also found that the multi-channel structure of WO3 could facilitate the electron transfer and mass transport during the electrochemical reaction.

• 出版日期2015-8-15
• 单位浙江工业大学