在直接甲醇燃料電池中，陽極的甲醇容易透過質子交換膜擴散到達陰極。這些甲醇會在陰極的白金觸媒上氧化產生一氧化碳和混合電流，因而大幅降低燃料電池的性能。基於此，我們希望通過二氧化鈦修飾白金觸媒來形成一結構上的屏障，降低甲醇分子的影響和阻止甲醇分子的反應，從而提升白金觸媒在氧氣還原反應中的抗甲醇性能。在白金觸媒的乙醇溶液中，加入適量鈦酸四丁酯，再通入水蒸氣緩慢水解和微波熱處理分解，可控制二氧化鈦成長於白金表面。各種測試顯示二氧化鈦的尺寸約爲奈米級，並且表面存在大量的氧缺陷，但只會對白金觸媒有些微的電子和幾何結構的影響。電化學測試表明這些奈米二化氧鈦的修飾能夠顯著提升白金觸媒的抗甲醇性能。

In direct methanol fuel cells, the methanol in anode easily through the proton exchange membrane to reach the cathode. This methanol will oxidize on the surface of platinum and produce carbon monoxide and a mixed potential that will reduce the efficiency. Based on above reasons, it is envisaged to deposit TiO2 nanoparticles on Pt catalyst. By creating purposed steric disturbance to the diffusion of large molecules like methanol in the proximity of Pt surface, it is expected to enhance the methanol- tolerance ability of Pt/C on cathode. Deposition and modification of titanium dioxide on Pt/C were achieved by slow hydrolysis of tetrabutyl titanate and microwave-assisted synthesis. Experimental results showed that TiO2 nanoparticles were deposited on the Pt surface successfully. Oxygen vacancies were shown on the titanium dioxide surface and the presence of such kind of defects was found beneficial in adsorbing methanol molecules. Although the interaction between TiO2 and Pt was not found prominent, electrochemical tests demonstrated that depositing Pt surface with TiO2 nanoparticles can effectively enhance the methanol-tolerance ability of platinum.

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