Journal
CHEM
Volume 8, Issue 6, Pages 1673-1687Publisher
CELL PRESS
DOI: 10.1016/j.chempr.2022.02.003
Keywords
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Funding
- Ministry of Science and Technology of China [2017YFA0208200, 2016YFA0204100]
- National Natural Science Foundation of China [22025108, 21903058, 22173066, 22103054, 22105146]
- Natural Science Foundation of Jiangsu Higher Education Institutions [17KJB150032, BK20190810]
- Jiangsu Province High-Level Talents [JNHB106]
- Project of Scientific and Technologic Infrastructure of Suzhou [SZS201708]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Xiamen University
- Soochow University
- Program for Jiangsu Specially Appointed Professors
- China Postdoctoral Science Foundation [2019M660128]
- Jiangsu Planned Projects for Postdoctoral Research Funds [2021K184B]
- Collaborative Innovation Center of Suzhou Nano Science Technology
- 111 Project
- Joint International Research Laboratory of Carbon-Based Functional Materials and Devices
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This study reports a new strategy to stabilize RuO2 by introducing interstitial carbon and successfully develops a stable OER electrocatalyst. The optimized catalyst exhibits low overpotential and long-term stability, indicating its potential application in water splitting.
Oxygen evolution reaction (OER) plays a critical role in energy conversion technologies. Significant progress has been made in alkaline conditions. In contrast, it remains a challenge to develop stable OER electrocatalysts in acidic conditions. Herein, we report a new strategy to stabilize RuO2 by introducing interstitial carbon (C-RRuO2-RuSe), where the optimized C-RuO2-RuSe-5 exhibits a low overpotential of 212, 259, and 294 mV to reach a current density of 10, 50, and 100 mA cm(-2), respectively. More importantly, C-RuO2 RuSe-10 has long-term stability of up to 50 h, representing one of the most stable OER electrocatalysts. X-ray absorption spectroscopy reveals that the Ru-O bonds have been elongated due to the formation of interstitial C. Theoretical calculations show that the elongated Ru-O bonds in RuO2 enhance its stability and reduce energy barriers for OER. This work provides a new perspective for designing and constructing efficient Ru-based electrocatalysts for water splitting.
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