本研究以實驗室發展之低溫水熱法製備奈米級雙金屬氧化物(鈦、釕)，並以其為白金觸媒之載體。將探討氧化鈦晶相(銳鈦礦及金紅石結構)，載體熱處理及不同鈦與釕合成比例之金屬氧化物之奈米結構；接著再將白金觸媒沉積於其上，瞭解金屬氧化物結構對白金觸媒結構之影響，並將其應用在甲醇氧化與氧氣還原電催化反應上。
研究結果指出以銳鈦礦結構之二氧化鈦為載體之觸媒有較佳電催化活性；在以不同鈦與釕合成比例之金屬氧化物中為載體之觸媒中，以20%Pt/Ti0.7Ru0.3O2具有最佳之電催化活性(MOR:最大電流密度 103 mA/cm2、起始電位0.49; ORR: 最大電流密度4.1 mA/cm2、起始電位0.79)，可歸因於載體具有較高之表面積與較佳之白金電子結構；由吸收光譜技術及理論計算模擬證實載體氧缺陷之形成將修飾白金電子結構而有助於提升電催化能力。在電極漿料製備工程上，以添加15 wt% 碳為助導劑之20%Pt/Ti0.7Ru0.3O2具有最佳之甲醇氧化及氧氣還原電催化能力。電化學穩定性測試顯示以雙金屬氧化物(TixRu1-xO2)為載體之觸媒相對於以傳統碳為載體之觸媒有較佳的電催化穩定性及抗腐蝕能力。

Abstract
This research adopts the developed low temperature hydrothermal method to synthesize nano-sized Ru-doped TiO2 bimetallic oxides, and emplyed as support for Pt catalyst. First, the nano structure of different phase of metal oxides (Anatse or Rutile), heat treatment effect and effect of Ti to Ru ratios were examined. The Pt catalyst was then deposited onto the bimetal oxide supports by ethylene glycol reduction method and the effect of bimetallic oxide supports on the nanostructure of Pt catalyst was further investigated. Finally, the catalysts were applied in the electrochemical methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR).
The results indicate that Anatase TiO2 supported Pt catalysts has better electrochemical activity compared that of rutile TiO2 supported Pt catalysts. Among the Ti1-xRuxO2 supported catalysts, the 20%Pt/Ti0.7Ru0.3O2 catalyst exhibits the best catalytic activity towards MOR add ORR (MOR: maxium current density 103 mA/cm2、onset potential 0.79 V/NHE), this can be ascribed to the high surface area of nano-sized support and electron-rich electroic structure of Pt. XAS characterization and computational simulation indicate that creation oxygen vacancies on Ti1-xRuxO2 supports would modify the electric structure of Pt catalysts and promote the catalytic activity. Regarding the electrode slurry fabrication engineering, 20%Pt/Ti0.7Ru0.3O2 catalyst exhibites the hightest MOR and ORR performance by adding 15% carbon in the slurry. The Ru-doped bimetallic oxides supported catalysts shows the superior electrochemical stability and corrosion resistance compared to traditional carbon supported Pt catalysts.

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