本研究探討不同方法製備金鉑雙金屬觸媒對DMM氧化反應的影響，包括電化學法先鉑後金沉積在玻璃碳電極(PtAuy/GC)、商購金鉑合金圓盤電極(PtxAuy)，透過化學還原法Au於商用Pt/C(Auy@Ptx/C)和共還原PtAu於碳黑(PtxAuy/C)的觸媒。XRD分析結果顯示以化學還原法製備之Auy@Ptx/C和PtxAuy/C觸媒，可獲得PtAu 合金，顆粒粒徑大小約 2~5 奈米，XPS分析結果顯示Pt會轉移部份電子到Au。在DMM氧化反應中，以單位電化學活性面積電流為基準比較，觀察到以化學還原法製得之Auy@Ptx/C觸媒，在正向氧化峰電流訊號明顯高於PtxAuy電極和PtAuy/GC觸媒，其中以Au3@Pt7/C觸媒和Au4@Pt6/C觸媒具有比商用Pt/C觸媒更高之正向氧化峰電流訊號與更低的氧化起始電位。單電池系統以Pt/C MEA測試發現0.2M DMM陽極進料條件具有較佳之放電電流，在固定的0.2 M DMM陽極進料濃度條件下，觀察到Au3@Pt7/C MEA在測試溫度55°C和75 °C下，表現與Pt/C MEA相近的表現，但Au3@Pt7/C MEA中只有Pt/C MEA 約1/3的Pt使用量，顯示Au修飾可以提升Pt/C催化DMM的氧化。

In this study，we discussed the effects of different methods for preparing gold-platinum bimetallic catalysts on the oxidation reaction of DMM。The electrochemical method was used to deposit platinum first and then gold on the glassy carbon electrode，which was named PtAuy/GC，and the commercially available gold-platinum alloy disk electrode was named PtxAuy，the catatlyst prepared by the chemical reduction method were named Auy@Ptx/C and PtxAuy/C。XRD analysis results show that Auy@Ptx/C and PtxAuy/C catalysts prepared by chemical reduction method can obtain PtAu alloy with a particle size of about 2-5 nm。XPS analysis results show that Pt will transfer some electrons to Au。In the DMM oxidation reaction，based on the current per unit electrochemical active area，it was observed that the Auy@Ptx/C
catalyst prepared by the chemical reduction method had a significantly higher peak current signal in the forward oxidation than the PtxAuy electrode and the PtAuy/GC catalyst，Au3@Pt7/C catalyst and Au4@Pt6/C catalyst have higher forward oxidation peak current signal and lower oxidation initiation potential than commercial Pt/C catalyst。The single-cell system was tested with Pt/C MEA and found that the 0.2 M DMM anode feed condition has a better discharge current，under the fixed 0.2 M DMM anode feed concentration condition，it was observed that Au3@Pt7/C MEA at the test temperature of 55°C and at 75 °C，the performance is similar to that of Pt/C MEA，but only about 1/3 of the Pt usage of Pt/C MEA in Au3@Pt7/C MEA，the result show that Au modified Pt/C can enhance the oxidation of DMM 。

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