本研究研製直接甲醇燃料電池用的鉑系合金觸媒分為兩大主題，主題一為比較不同還原劑(硼氫化鈉及次磷酸鈉)所製備觸媒與E-TEK商用觸媒的電化學活性；主題二為以次磷酸鈉作還原劑，利用實驗設計法找出最佳陰陽極觸媒的組合。
由TEM及XRD發現硼氫化鈉所還原的觸媒平均粒徑為3.5~4.5 nm，且粒徑分布不均，電化學活性最差；以次磷酸鈉作為還原劑，不僅能將觸媒平均粒徑有效降低至2.58 nm，並能製造分散性佳之鉑釕合金。利用循環伏安法與線性掃描法比較自製觸媒與商用觸媒E-TEK之電化學活性，發現以次磷酸鈉製備之觸媒CP6([次磷酸鈉]/[白金鹽]莫爾比=6)甲醇氧化之起始電位0.243 V（V vs. Ag/AgCl）略低於E-TEK起始電位0.245 V（V vs. Ag/AgCl）；CP6峰電流密度為0.049 mA/cm2，高於商用觸媒E-TEK之峰電流密度0.039 mA/cm2約26%； CP6峰電流密度比2.33高於E-TEK峰電流密度1.92約21%。
另外，以次磷酸鈉為還原劑，藉由實驗統計法的回應曲面圖可發現，較佳MEA陰陽極觸媒條件為陽極具有高白金擔載量（20 wt.%）且鉑釕原子比等於1，且陰極之鉑釕原子比等於1，但白金擔載量非必要條件。但當陰極白金擔載量低於2.5 wt.%時，速率決定步驟轉變為陰極，且引發整體電池放電功率下降，顯示陰極白金擔載量仍有極限值存在。

This report investigated platinum alloy as the catalyst for direct methanol fuel cell. This study was divided into two parts. The first part was to compare the electrochemical activity among commercial catalyst E-TEK and self-made catalysts reduced by three different reducing agents, NaBH4, CH3OH and NaH2PO2. The second part was to find an optimum combination of PtRu/C catalyst for MEA by Experimental Design method.
According to TEM and XRD analysis, the average grain size of the catalysts reduced by NaBH4 was about 3.5 ~ 4.5 nm and the particle size distribution was broader. These two factors gave lower electrochemical activity than that prepared by NaH2PO2. The reducing agent NaH2PO2 not only effectively reduced the average grain size of the catalysts to 2.5 nm but accomplished better particle size dispersion. The electrochemical activity of self-made catalysts and commercial catalyst E-TEK was evaluated by cyclic voltammetry and linear sweep voltammetry. It was found that the onset potential of methanol oxidation of catalyst CP6 ( [NaH2PO2]/[H2PtCl6]=6 ) reduced by NaH2PO2 is 0.243 V (V vs. Ag/AgCl) which was lower than that of commercial catalyst E-TEK 0.245 V (V vs. Ag/AgCl); the peak current density of CP6 is 0.049 mA/cm2 which was higher than that of E-TEK 0.039 mA/cm2 about 26 %; the peak current density ratio of CP6 is 2.33 which is higher than that of E-TEK 1.92 about 21%.
With the response surface methodology of experimental design, it was found that the best conditions of the MEA happened when the platinum loading was high and the Pt/Ru atomic ratio was 1 on the anode electrode; and the Pt/Ru atomic ratio was 1 and the platinum loading was not the key factor for the cathode electrode. However, when the platinum loading of the cathode electrode was lower than 2.5 wt. %, the power density of the single cell became worse probably because of the rate determining step switching to the cathode electrode. Apparently, there was an ultimate value of platinum loading on the cathode electrode.

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