119th General Meeting of the KCS

Type Poster Presentation
Area 전기화학
Room No. 포스터발표장
Time 4월 21일 (금요일) 13:00~14:30
Code ELEC.P-516
Subject Electrocatalytic Activities of Highly Dispersive Gold Nanoparticles on Carbon Black
Authors 김여민, 조아라, 이영미*, 이종목*
이화여자대학교 화학나노과학과, Korea
Abstract We investigated electrocatalytic activities toward oxygen reduction reaction (ORR) and CO2 reduction with highly dispersive gold nanoparticles on carbon black (HD-AuNPs/C). The catalysts were synthesized through a facile chemical reduction method in aqueous solution. The dispersity and size of Au NPs on carbon black were controlled by varying the concentration of reducing agent, where the mean diameters of Au NPs on carbon black were changed from 1.4 to 6.0 nm. HD-Au NPs/C with mean diameter of 1.4 nm Au NPs exhibited the best catalytic performance for ORR in the rotating disk electrode experiments having the electron transferred number of 3.61 and the most positive half-wave potential which was comparable with Pt/C. Meanwhile, the cyclic voltammetry (CV) experiments showed CO2 reduction preceded hydrogen evolution reaction in HD-Au NPs/C as the potential moved to the negative direction. Generation of CO, the reduction product of reduction of CO2, was also monitored in real time during CV using substrate generation/tip collection (SG/TC) mode of SECM, where the Pt/Sn CO microsensor were used as a tip electrode.
E-mail yeo028@gmail.com