Core-shell hierarchical WO2/WO3 microspheres as an electrocatalyst support for methanol electrooxidation
Yang Zhou1, Xian-Chao Hu, Xi-Hui Liu
1School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, 86 Hongqi Road, Ganzhou 341000, P. R. China. yangzhou1998@126.com.
Chemical Communications (Cambridge, England)
|September 5, 2015
Summary
New core-shell WO2/WO3 microspheres offer superior performance for methanol electrooxidation. This enhanced catalyst stability and activity stem from using tungsten dioxide (WO2) as a conductive oxide, reducing electron-transfer resistance.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Methanol electrooxidation is crucial for fuel cells.
- Developing efficient and stable catalysts is essential.
- Tungsten oxides (WOx) are explored for catalytic applications.
Purpose of the Study:
- To synthesize core-shell WO2/WO3 microspheres.
- To evaluate their performance in methanol electrooxidation.
- To understand the role of WO2 in enhancing catalytic activity.
Main Methods:
- Phase transformation route for preparing core-shell WO2/WO3 microspheres.
- Electrochemical testing of the catalyst for methanol electrooxidation.
- Comparison with commercial catalysts (PtRu/C, Pt/h-WO3).
Main Results:
- The Pt-WO2/WO3 catalyst demonstrated excellent activity and stability.
- Performance surpassed commercial PtRu/C and Pt/h-WO3 catalysts.
- WO2 modification decreased electron-transfer resistance, enhancing performance.
Conclusions:
- Core-shell WO2/WO3 microspheres are effective catalysts for methanol electrooxidation.
- The use of WO2 as a conductive oxide significantly improves catalyst performance.
- This approach offers a promising strategy for advanced electrocatalyst development.
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