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| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Grand Ballroom |
| Time |
10월 19일 (금요일) 11:00~12:30 |
| Code |
ELEC.P-465 |
| Subject |
Oxygen Evolution Reaction on Nanoporous Gold Modified with Ir and Pt: Synergistic Electrocatalysis between Structure and Composition |
| Authors |
Yumi Wang, Jongwon Kim*
Department of Chemistry, Chungbuk Natioanl University, Korea
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| Abstract |
Oxygen evolution reaction (OER) is used in electrochemical devices that store the energy of electricity or light as chemical energy. At this time, there is a problem that OER requires high overpotential because the reaction is more sluggish than hydrogen evolution reaction (HER). Therefore, researching on OER has been investigated to reduce its overpotential. In this study, we used a very large surface area NPG. NPG is applied in many studies because the structure is electrochemically stable and exhibits high catalytic activity in a variety of reactions. However, no significant OER activity was observed with NPG itself. In this study, the NPG surfaces were modified with Pt using atomic layer electrodeposition methods, and the resulting NPG@Pt exhibited enhanced OER activities compared to the NPG and flat Pt electrode. Ir-modified NPG (NPG@Pt) electrodes were prepared by spontaneous replacement of Ir on NPG surfaces, which exhibited enhanced OER activity compared to the flat Ir surfaces. The modification of Ir on NPG@Pt resulted in the NPG@Pt/Ir electrodes, and their OER activity exceeded that of NPG@Ir surfaces. As a result, the OER activity on NPG@Pt/Ir surfaces demonstrates the synergistic electrocatalysis between structure of nanoporous surfaces and the active OER components. The OER activity was compared using these electrodes and the durability was confirmed by the chronopotentiometry.
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| E-mail |
dbal1414@naver.com |
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122nd General Meeting of the KCS