本實驗利用具有大表面積及優越導電性的一維氮化銦(InN)奈米帶作為以化學氣相沉積法共沉積Pt-Ru雙金屬觸媒的模版，探討觸媒沉積後的組成、形態，及其電化學性質，期待作為直接甲醇燃料電池中陽極觸媒方面的應用。首先，純N2氣氛下的沉積結果發現觸媒隨著沉積時間增加而有較好的披覆性，經H2氣氛退火後，Ru將由氧化態轉變為金屬態，並提升奈米帶電極的催化活性。之後，使用混合氣體H2與N2作為稀釋氣體共沉積Pt-Ru，發現Ru大都以金屬態的形式存在，且可觀察到雙觸媒均勻分布沉積在InN奈米帶表面。由X光繞射圖配合電化學結果，顯示以(111)為擇優成長晶面的Pt-Ru雙觸媒有效促使甲醇進行氧化反應。由改變Ru進料濃度的實驗，確實證明所沉積之Pt-Ru雙觸媒為合金態結構。最後在純H2氣氛的沉積結果顯示，隨著沉積時間增加，愈有助於Pt-Ru合金的(111)晶面形成。如沉積120分鐘後的試片的循環伏安圖譜，能在0.442 V的驅動電位下，表現出60.47 mA/cm2的極大催化電流密度及3.53倍的陽極正逆掃描電流比，說明以(111)為擇優晶面的Pt-Ru雙觸媒合金提供了甲醇氧化的最適當催化位置。

One dimensional (1-D) InN nanobelts with large surface area and high conductivity were used as templates for the codeposition of Pt-Ru bimetal catalysts by metal organic chemical vapor deposition (MOCVD) technique. The chemical composition, morphology and electrochemical characteristics that applicable for the anode electrode in direct methanol fuel cell (DMFC) were also investigated. Firstly, increasing catalyst coverage was found under pure N2 deposition atmosphere when the deposition time was raised. After annealing in H2 ambiance, metallic Ru was transformed from oxidation state, and the catalytic activity of nanobelt electrode was improved. It was found that Ru existed as metallic state on the surface of InN nanobelts when Pt-Ru catalysts were codeposited uniformly in a mixed stream of H2 and N2. Cyclic voltammogram (CV) with respect to methanol showed that (111) preferred oriented Pt-Ru on InN nanobelts exhibited the most efficient methanol oxidation characteristics. Pure H2 reaction atmosphere was found to favor the formation of (111) preferred oriented Pt-Ru alloy layer on InN nanobelts. High catalytic current of 60.47 mA/cm2 and If/Ib ratio (the ratio of forward anodic peak current density (If) to the reverse anodic peak current density (Ib)) of 3.53 were obtained, suggesting the potential of adopting Pt-Ru/InN nanobelts system for DMFC application.

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