1. Constructing heterogeneous interface between Co3O4 and RuO2 with enhanced electronic regulation for efficient oxygen evolution reaction at large current density.
- Author
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Li, Weidong, Liu, Yuan, Chen, Zhihui, Peng, Binqiong, Ma, Qiang, Yue, Dan, Zhang, Bing, Qin, Bowen, Wang, Zhenling, Zhang, Yilei, and Lu, Siyu
- Subjects
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OXYGEN evolution reactions , *HYDROGEN evolution reactions , *ELECTROCATALYSTS , *EXCHANGE reactions , *ACTIVATION energy , *CATALYST structure , *ION exchange (Chemistry) , *HYDROGEN as fuel - Abstract
[Display omitted] • Co 3 O 4 /RuO 2 heterojunction interface is construct through an ion exchange reaction and pyrolysis. • The optimal Co 3 O 4 /RuO 2 -4 electrocatalyst exhibits outstanding oxygen evolution reaction activity and remarkable stability at large current density. • The electronic structures of Co 3 O 4 /RuO 2 are modulated at the heterointerface which regulating electron redistribution. Exploring effective strategies for developing new high-efficiency catalysts for water splitting is essential for advancing hydrogen energy technology. Herein, Co 3 O 4 /RuO 2 heterojunction interface is construct through ion exchange reaction and pyrolysis. The as-synthesized Co 3 O 4 /RuO 2 -4 exhibits outstanding oxygen evolution reaction (OER) activity at the current density of 100 mA cm−2 with a low overpotential of 276 mV, and remarkable stability (maintaining activity for 60 h at 100 mA cm−2). Experimental results and theoretical calculations reveal that the electrons around the heterogeneous interface transferred from RuO 2 to Co 3 O 4 , resulting in electron redistribution and optimization of energy barriers for OER intermediates. This unique composite catalyst structure offers a new potential for designing efficient oxygen electrocatalysts at large current density. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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