Core-Shell Structured PtxMoy@TiO2 Nanoparticles Synthesized by Reverse Microemulsion for Methanol Electrooxidation of Fuel Cells

被引:2
作者
Ai, Tianyu [1 ]
Bao, Shuo [1 ]
Lu, Jinlin [1 ]
机构
[1] Univ Sci & Technol Liaoning, Sch Mat & Met, Anshan, Peoples R China
基金
中国国家自然科学基金;
关键词
reverse microemulsion method; PtMo alloy; core-shell structure; electrocatalyst; methanol oxidation reaction; OXYGEN REDUCTION; ELECTROCATALYTIC ACTIVITY; TUNGSTEN CARBIDE; CATALYSTS; OXIDATION; NI; STABILITY; ALLOY; NANOSTRUCTURES; PERFORMANCE;
D O I
10.3389/fchem.2021.667754
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The high price of catalyst and poor durability still restrict the development of fuel cells. In this work, core-shell structured PtxMoy@TiO2 nanoparticles with low Pt content are prepared by a reverse microemulsion method. The morphologies, particle size, structure, and composition of PtxMoy@TiO2 nanoparticles are examined by several techniques such as X-ray Diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy, etc. The PtxMoy@TiO2 electrocatalysts show significantly higher catalytic activity and better durability for methanol oxidation than the commercial Pt/C (ETEK). Compared to Pt/C catalyst, the enhancement of the electrochemical performance of PtxMoy@TiO2 electrocatalysts can be attributed to the core-shell structure and the shift of the d-band center of Pt atoms, which can weaken the adsorption strength toward CO molecules, facilitate the removal of the CO groups and improve electrocatalytic activity. The development of PtxMoy@TiO2 electrocatalysts is promising to reduce the use of noble metal Pt and has a great potential for application in fuel cells.
引用
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页数:9
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