• Title/Summary/Keyword: 직접메탄올 연료전지

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Oxidation Characteristics of Methanol on Pt/C and Pt-Ru/C Catalyst for the Anode of Direct Methanol Fuel Cell (Pt/C 및 Pt-Ru/C 촉매를 사용한 직접 메탄올 연료전지 연료극의 메탄올 산화 반응 특성)

  • 정두환;이창형;신동열
    • Journal of Energy Engineering
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    • v.7 no.1
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    • pp.35-43
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    • 1998

  • Electrodes using for the anode electrode of direct methanol fuel cell with Pt/C and Pt/Ru/C catalyst were prepared and characterized by SEM, TEM, thermal analysis and electrochemical analysis. The half cell tests were carried out with 1 M $H_2SO_4$ electrolyte and 1 M $CH_3OH$ in order to evaluate the electrode performance. The employed electrochemical methods were cyclic vol-tammetry and potentiodynamic polarization experiments. It was found that 20 w% polytetrafluoroethylene (PTFE) content in catalyst showed the best performance due to the best platinum utilization on PTFE-containing catalyst layer. It was found that Pt/Ru/C binary catalyst inhibited the poisoning of anode electrode showing improved performance compared to the Pt/C catalyst by the adsorption of oxygen containing species on the electrode surface at same time. The apparent activation energy for methanol oxidation on the Pt/Ru/C and Pt/C catalyst layer was 11.60 kJ/mol and 26.85 kJ/mol, respectively.

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Effects of the Methanol Concentration, Wind Velocity and Stack Temperature on the performance of Direct Methanol Fuel Cell (직접 메탄올 연료 전지의 성능에 대한 메탄올 농도, 풍속 및 스택 온도의 영향)

  • Kim, Yong-Ha;Kim, Seok-Il
    • Journal of Aerospace System Engineering
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    • v.1 no.2
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    • pp.21-26
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    • 2007

  • DMFC(Direct Methanol Fuel Cell) has been considered as an attractive option to produce electric power in many application. In this study, in order to estimate the effects of the methanol concentration, wind velocity and temperature on the performance of DMFC, a physical prototype of DMFC was designed and manufactured, and the stack voltage of DMFC was measured during the operation of DMFC. Expecially, the experimental results showed that a low stack temperature, a low wind velocity and an excess methanol concentration lead to the increase of the time to reach the maximum stack voltage.

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