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首页> 外文会议>American Ceramic Society Annual Meeting and Exposition; 20050410-13; Baltimore,MD(US) >NOVEL SOL-GEL SYNTHESIS AND CHARACTERIZATION OF HIGH-SURFACE-AREA Pt-Ru CATALYSTS AS ANODES FOR DIRECT METHANOL FUEL CELLS
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NOVEL SOL-GEL SYNTHESIS AND CHARACTERIZATION OF HIGH-SURFACE-AREA Pt-Ru CATALYSTS AS ANODES FOR DIRECT METHANOL FUEL CELLS

机译：高表面积表面积Pt-Ru催化剂的新型溶胶-凝胶合成和表征，作为直接甲醇燃料电池的阳极

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摘要

A novel complexation based sol-gel process has been developed to synthesize Pt-50at.% Ru based anode catalysts possessing high specific surface area with good catalytic activity. A homogeneous amorphous gel was successfully synthesized by complexing platinum(Ⅱ) acetylacetonate and ruthenium(Ⅲ) acetylacetonate with tetramethylammonium hydroxide (TMAH) used as a complexing agent. Phase pure Pt(Ru) solid solution of nominal composition Pt-50at.% Ru, possessing high specific surface area (～75m~2/g-140m~2/g) were successfully produced by controlled removal of carbonaceous species generated from the as-prepared precursor. The controlled removal of carbon related species has been successfully performed by controlled thermal treatment of the precursor using controlled oxidizing atmospheres such as 1% O_2 balanced with ultrahigh purity (UHP) argon. It has been identified that the nanocrystalline Pt(Ru) solid solution of nominal composition Pt-50at.% Ru possessing good chemical homogeneity with less amount of non-conducting carbon reveals an excellent catalytic activity, demonstrating the potential of the novel sol-gel process for synthesizing high-performance catalysts for direct methanol fuel cells.
机译：已经开发了基于络合的新颖的溶胶-凝胶方法来合成具有高比表面积和良好催化活性的Pt-50原子％Ru的阳极催化剂。将乙酰丙酮铂（Ⅱ）和乙酰丙酮钌（Ⅲ）与四甲基氢氧化铵（TMAH）配位络合，合成出均匀的非晶态凝胶。通过控制地去除由砷生成的碳质物质，成功生产了标称组成为Pt-50at。％Ru，具有高比表面积（〜75m〜2 / g-140m〜2 / g）的相纯Pt（Ru）固溶体。制备的前体。通过使用受控氧化气氛（例如1％O_2和超高纯（UHP）氩气平衡）对前驱体进行受控热处理，已成功地完成了对碳相关物质的受控去除。已经确定，标称组成为Pt-50at。％Ru的纳米晶Pt（Ru）固溶体具有良好的化学均质性，且非导电碳的量较少，显示出优异的催化活性，证明了新型溶胶-凝胶工艺的潜力用于合成直接甲醇燃料电池的高性能催化剂。

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