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  • 02월 28일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Study of electrocatalytic oxygen reduction reaction on metal nanocluster based electrodes

2019년 2월 13일 10시 29분 02초
ELEC.P-456 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 18일 (목요일) 11:00~12:30
저자 및
Young lim Byeon, Dongil Lee*
Department of Chemistry, Yonsei University, Korea
The development of effective electrocatalysts for the oxygen reduction reaction (ORR) has caught much attention because it represents a critical cathodic reaction in fuel cells and other electrochemical energy devices. Despite extensive research progress, the commercialization of fuel cells has been hindered so far by the sluggish reaction dynamics and by the expensive platinum catalysts. Therefore, a number of studies have focused on non-platinum electrocatalysts. Recently, several studies have shown that gold nanoparticles increase ORR activities. In this study, The ORR activity of the nanostructure composed of metal nanocluster and carbon material was investigated, and effect of electrolyte basicity and metal doping effect of thiolate-protected nanoclusters were examined. First of all, mixture of Au25 and multi-walled carbon nanotube(CNT) were cast on the glassy carbon electrode(GCE), then the fabricated GCE showed higher conductivity and efficiency on ORR. Next, the fabricated electrode made the onset potential of ORR shift more positive on the alkaline environment than neutral electrolyte condition. In addition, Ag25 which has a lot of similarity with Au25 in geometry exhibited improved ORR activity. In conclusion, electrocatalytic activity of ORR could be adjusted using modification of metal atom, pH and addition of carbon material. These ways to change the catalytic effect might help the design of tailored catalysts for the other electrocatalytic reactions.