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  • 09월 10일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Comparing Activity of S-doped Carbon Nanofiber depending on C-S bond toward Alkaline Oxygen Reduction Reaction

2019년 9월 9일 15시 02분 16초
ELEC.P-443 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 17일 (목요일) 11:00~12:30
저자 및
Kahyun Ham, Minjun Choi, Jaeyoung Lee*
School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Korea
Fuel cell technologies have attracted due to their various advantages, such as high power density, and low working temperature. However, some limitations still remain, such as sluggish kinetics of oxygen reduction reaction (ORR) and the high price of Pt, one of the most active catalysts in both anode and cathode. Thus metal-free catalyst based on carbon materials has attention. the S atom can change the spin density in the carbon π-system, which can further promote the catalytic activity of the ORR. However, S atom and some C-S bond are known as a non-active site for ORR, while they cause 2 electron reaction, hydrogen peroxide production. In this study, we synthesized carbon nanofiber via electrospinning and impregnated S atoms in the carbon nanofiber by successive heat treatment. The kinds of C-S bond on S-doped carbon nanofiber were dependent on the heat treatment temperature. It caused different activity trend of ORR or hydrogen peroxide production in alkaline media. Thus we investigated the number of a participated electron during reduction using a rotating ring disk electrode method and figured out the relationship between the activity and kinds of C-S bond confirmed by XPS and TGA.