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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Design and assessment of bimetallic oxygen reduction catalysts as applied to microbial fuel cells

등록일
2014년 8월 28일 13시 46분 09초
접수번호
0891
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10월 15일 (수요일) 16:00~19:00
발표형식
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발표분야
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이영록, Ahmed Jalal, 김성현1,*
건국대학교 생명공학과, Korea
1건국대학교 특성화학부생명공학과, Korea
Although main focus has been made on anodes where microorganisms function as biocatalysts oxidizing various organic and inorganic substances, more and more attention has been pouring on cathodes. Like chemical fuel cells, microbial fuel cells (MFCs) also use oxygen as a cathodic fuel and thus it is of paramount importance to develop cost effective, reliable oxygen reduction reaction (ORR) catalysts that can replace precious metal-based catalysts. Here we present our preliminary results of ORR catalysts development using bimetallic combination. We designed the catalyst system based on thermodynamic principles in which each metal plays different roles. In addition to that, we also investigated the effect of nitrogen atoms on ORR as they have been known to greatly increase ORR activity. To incorporate N into bimetallic systems, we synthesized M-Pd (M=V or Zn) systems from a mixture of metal salt precursor with a nitrogen-donating compound (N) and carbon nano powder (C) and heat-treated them at high temperature. Catalyst performance was evaluated by rotating disc and rotating ring-disc (RRD) techniques. From RRD experiments, the onset potential of ORR and the percentage of hydrogen peroxide were calculated. It turned out that bimetallic systems have better ORR activities than individual components. When applied to MFCs, power enhancement was observed.

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