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首页> 外文会议>Electrochemical Society(ECS) Meeting;Symposium on Electrochemistry of Novel Electrode Materials for Energy Conversion and Storage; 20070506-11;20070506-11; Chicago,IL(US);Chicago,IL(US) >Characterization of Thin-Film Electrodes on Proton-Conducting Glass Membranes for Micro DMFC Applications
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Characterization of Thin-Film Electrodes on Proton-Conducting Glass Membranes for Micro DMFC Applications

机译：用于微型DMFC应用的质子传导玻璃膜上的薄膜电极的表征

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摘要

Thin film electrodes for a low power direct methanol fuel cell (DMFC) were prepared by incorporating carbon-supported Pt nanoparticles (Pt/C) into a silicon dioxide glass matrix. The SiO_2 matrix was prepared via a sol-gel technique where tetraethyl orthosilicate (TEOS) was hydrolyzed by H_2O in the presence of methanol. The Pt/C was stirred into the sol and the resulting mixture was applied to a glass membrane substrate and cured. The resulting films were approximately 2 μm thick. Scanning electron micrographs (SEM) indicate that the Pt/C was well dispersed, forming conductive islands with sheet resistances in excess of 5000 Ω/square. The catalyst islands were interconnected into a conductive sheet by electrolessly depositing platinum from an aqueous plating bath. The Pt/C - SiO_2 glass composite thin-film electrodes showed high methanol oxidation peak currents and promising performance when applied to the anode of a 1 cm~2 passive DMFC.
机译：通过将碳载Pt纳米颗粒（Pt / C）掺入二氧化硅玻璃基质中，制备了用于低功率直接甲醇燃料电池（DMFC）的薄膜电极。通过溶胶-凝胶技术制备SiO_2基体，其中在甲醇存在下，原硅酸四乙酯（TEOS）在水中被H_2O水解。将Pt / C搅拌至溶胶中，并将所得混合物施加至玻璃膜基材上并固化。所得膜约2μm厚。扫描电子显微照片（SEM）表明Pt / C分散良好，形成了导电岛，其薄层电阻超过5000Ω/平方。通过从含水电镀浴无电沉积铂，将催化剂岛互连成导电片。 Pt / C-SiO_2玻璃复合薄膜电极在1 cm〜2无源DMFC的阳极上显示出较高的甲醇氧化峰值电流，并具有良好的性能。

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