Effect of Electrochemical Reduction of Ruthenium Black Cathode Catalyst on the Performance of Polymer Electrolyte Membrane Fuel Cells

캐소드 루테늄 촉매의 전기화학적 환원 처리가 고분자 전해질 연료전지 성능에 미치는 영향

  • Choi, Jong-Ho (Dept. of New and Renewable Energy, Kyungil University)
  • 최종호 (경일대학교 신재생에너지학과)
  • Received : 2011.05.20
  • Accepted : 2011.05.27
  • Published : 2011.05.31


Ru black was used for cathode catalyst in polymer electrolyte membrane fuel cell which showed low performance at the initial test. However, it was observed that the performance of Ru black cathode was dramatically enhanced after certain kind of experiment compared with initial one. It might be due to an electrochemical treatment in which a voltage was applied to the Ru cathode for constant period time. When a constant potential of 0.1 V was applied to Ru cathode for 30 min, the fuel cell performance of Ru cathode showed the best results. In order to investigate the effect of electrochemical treatment on the performance enhancement, the characteristics of electrochemically treated Ru black was compared with that of Ru black which was reduced under $H_2$ atmosphere. From XRD results, it was turned out that Ru black was not completely converted to metallic Ru by electrochemical treatment, but it is sufficient to be one of reasons for the performance enhancement. According to the results of CO stripping voltammetry, it was observed that some Ru was removed from Ru electrode by electrochemical treatment which might have a bad effect on the fuel cell performance. The removal of some Ru from as-received Ru black by electrochemical treatment is also another reason for the enhancement of fuel cell performance.


Supported by : 경일대학교


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