IrO2-ZnO Hybrid Nanoparticles as Highly Efficient Trifunctional Electrocatalysts
- Authors
- Kwak, Inhye; Kwon, Ik Seon; Kim, Jundong; Park, Kidong; Ahn, Jae-Pyoung; Yoo, Seung Jo; Kim, Jin-Gyu; Park, Jeunghee
- Issue Date
- 13-7월-2017
- Publisher
- AMER CHEMICAL SOC
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY C, v.121, no.27, pp.14899 - 14906
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF PHYSICAL CHEMISTRY C
- Volume
- 121
- Number
- 27
- Start Page
- 14899
- End Page
- 14906
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/82836
- DOI
- 10.1021/acs.jpcc.7b03844
- ISSN
- 1932-7447
- Abstract
- Development of high-performance catalysts is very crucial for the commercialization of sustainable energy conversion technologies. Searching for stable, highly active, and low-cost multifunctional catalysts has become a critical issue. In this study, we report the synthesis of IrO2-ZnO hybrid nanoparticles and their highly efficient electrocatalytic. activities toward oxygen/hydrogen evolution reaction (OER/HER) as well as oxygen reduction reaction (ORR). For comparison, we synthesized RuO2-ZnO, showing a smaller catalytic activity than IrO2-ZnO, which provides robust evidence for the unique synergic effect of these hybrid structures. IrO2-ZnO and RuO2-ZnO exhibit excellent OER catalytic performance with Tafel slopes of 57 and 59 mV decade(-1), respectively. For HER, IrO2-ZnO shows a higher catalytic activity than RuO2-ZnO. The numbers of electrons involved in the ORR were 3,7 and 2.8, respectively, for IrO2-ZnO and RuO2-ZnO. The remarkable catalytic performance of IrO2-ZnO would be ascribed to the abundant oxygen vacancies and the metallic states of Ir, which ensure excellent catalytic activity and stability.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - Graduate School > Department of Advanced Materials Chemistry > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.