Highly mixed high-energy d-orbital states enhance oxygen evolution reactions in spinel catalysts
- Title
- Highly mixed high-energy d-orbital states enhance oxygen evolution reactions in spinel catalysts
- Creator
- Santhosh Kumar R.; Muthu Austeria P.; Sagaya Selvam Neethinathan C.; Ramakrishnan S.; Sekar K.; Kim A.R.; Kim D.H.; Yoo P.J.; Yoo D.J.
- Description
- Design, synthesis, and engineering of electrocatalysts for the oxygen evolution reaction (OER) are essential for attaining desirable electrocatalytic performance towards practical implementation. Emerging spinel-type OER catalysts have not reached the desirable activity and durability, thus demanding critical research to advance the field. To achieve enhanced OER performance for spinel-type OER catalysts, we present an efficient strategy of electronic structure modulation of central metal atoms. Modulation of the electronic properties of the Zn and Co atoms through the counter anionic components (O, S, and Se) regulates the adsorption of oxygen intermediates and thus enhances OER activity, which is systematically demonstrated using Density Functional Theory (DFT) calculation. Although the zinc cobalt selenide catalyst showed the less pronounced trigonal distortion, the mixing of eg orbitals with selenium accounts for the experimentally observed enhancement in OER activity. The result is, in contrast to the benchmark catalyst made of RuO2, ZnCo2Se4@rGO demonstrated lower OER overpotential (?10 = 302 mV) and Tafel slope (58 mV dec?1) as well as greater durability at 10 mA cm?2 for 50 h. The implementation of this strategy in several spinel-type catalysts could improve their electrocatalytic performance. 2023 Elsevier B.V.
- Source
- Applied Surface Science, Vol-641
- Date
- 2023-01-01
- Publisher
- Elsevier B.V.
- Subject
- Anion modification; Electronic structure modulation; Oxygen evolution reaction; Spinel catalyst; Trigonal distortion
- Coverage
- Santhosh Kumar R., Department of Energy Storage/Conversion Engineering of Graduate School (BK21 FOUR), Hydrogen and Fuel Cell Research Center, Jeonbuk National University, Jeollabuk-do, Jeonju, 54896, South Korea; Muthu Austeria P., Division of Science Education, Jeonbuk National University, 54896 Jeonbuk, Jeonju, South Korea; Sagaya Selvam Neethinathan C., School of Chemical Engineering and SKKU Institute of Energy Science and Technology (SIEST), Sungkyunkwan University (SKKU), Suwon, 16419, South Korea, Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bengaluru, 560029, India; Ramakrishnan S., Department of Energy Storage/Conversion Engineering of Graduate School (BK21 FOUR), Hydrogen and Fuel Cell Research Center, Jeonbuk National University, Jeollabuk-do, Jeonju, 54896, South Korea, School of Engineering, Newcastle University, Merz Court, Newcastle Upon Tyne, NE17RU, United Kingdom; Sekar K., Department of Earth Resources Engineering, Kyushu University, Fukuoka, 819-0395, Japan, Sustainable Energy and Environmental Research Laboratory, Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, 603 203, India; Kim A.R., Department of Energy Storage/Conversion Engineering of Graduate School (BK21 FOUR), Hydrogen and Fuel Cell Research Center, Jeonbuk National University, Jeollabuk-do, Jeonju, 54896, South Korea, Department of Life Science, Jeonbuk National University, Jeollabuk-do, Jeonju, 54896, South Korea; Kim D.H., Division of Science Education, Jeonbuk National University, 54896 Jeonbuk, Jeonju, South Korea; Yoo P.J., School of Chemical Engineering and SKKU Institute of Energy Science and Technology (SIEST), Sungkyunkwan University (SKKU), Suwon, 16419, South Korea; Yoo D.J., Department of Energy Storage/Conversion Engineering of Graduate School (BK21 FOUR), Hydrogen and Fuel Cell Research Center, Jeonbuk National University, Jeollabuk-do, Jeonju, 54896, South Korea, Department of Life Science, Jeonbuk National University, Jeollabuk-do, Jeonju, 54896, South Korea
- Rights
- Restricted Access
- Relation
- ISSN: 1694332; CODEN: ASUSE
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Santhosh Kumar R.; Muthu Austeria P.; Sagaya Selvam Neethinathan C.; Ramakrishnan S.; Sekar K.; Kim A.R.; Kim D.H.; Yoo P.J.; Yoo D.J., “Highly mixed high-energy d-orbital states enhance oxygen evolution reactions in spinel catalysts,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 24, 2025, https://archives.christuniversity.in/items/show/13884.