119th General Meeting of the KCS

Type Symposium
Area Recent Trends in Electrochemistry Ⅱ
Room No. 406호
Time FRI 09:25-:
Code ELEC2-2
Subject Electrochemical SERS Investigation of Formic Acid Electrooxidation on Pt Modified Au Surfaces
Authors 김종원
충북대학교 화학과, Korea
Abstract The electrooxidation of formic acid (FA) on Pt has received great attention because of its fundamental significance as a model reaction and its technical importance in fuel cells. In this work, the mechanism of FA electrooxidation on Pt modified Au surfaces was investigated via in situ electrochemical surface-enhanced Raman scattering (SERS). SERS-active DAR@Pt(n) substrates were prepared using the self-terminating electrodeposition of Pt on dendritic Au rod (DAR) surfaces, wherein the amount and coverage of Pt were precisely controlled by applying a different number of potential steps (n) during the electrodeposition process. The electrocatalytic activity of FA was highly dependent on the Pt coverage and thickness on DAR@Pt(n), which was investigated by electrochemical SERS. The amount of CO produced by the dehydration of FA, the potential-dependent SERS intensity variation, and the Stark slopes were examined on different DAR@Pt(n) surfaces. Based on these results, insights into the mechanistic interpretation of FA electrooxidation on Pt-Au system are discussed.
E-mail jongwonkim@chungbuk.ac.kr