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학술발표회초록보기

초록문의 abstract@kcsnet.or.kr

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  • 09월 06일 15시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제112회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Tuning of the electrocatalytic activities of Au electrodes

등록일
2013년 8월 30일 15시 15분 19초
접수번호
1244
발표코드
ELEC.O-6 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 11시 : 50분
발표형식
구두발표
발표분야
전기화학 - Young Electrochemists Symposium
저자 및
공동저자
Dutta Gorachand, 양해식*
부산대학교 화학과, Korea
Much effort has been devoted to achieving high activities via morphology or composition control and/or via thermal, cathodic, or chemical treatment. Nevertheless, the dependence of electrocatalytic activities on aging has never been investigated. If electrocatalytic activities of nanomaterials or bulk electrodes change with aging, the activities measured just after their preparation or pretreatment does not represent normal ones. The electrocatalytic activities of Au electrodes are enhanced by NaBH4 treatment (dipping electrodes in NaBH4 solution), mechanical polishing or by piranha treatment. However, the enhanced activities slowly decrease with aging. Moreover, Au nanoparticles freshly prepared also show high electrocatalytic activities, but the activities slowly decrease with aging both in air and in solution. This deactivation becomes faster by treatment with Fenton’s reagent on gold electrode. The electron-transfer rate and surface roughness of Au electrodes can be decreased simply by ultrasonic treatment. It seems that the hydroxyl radical generated during ultrasonic treatment plays an important role, as in the case of treatment with Fenton’s reagent.

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