|
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 |
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