Synergistic effect of Ru single atoms and MnO2 to boost oxygen reduction/ evolution activity via strong electronic interaction

被引：10
作者：
Liu, Shan [1 ]
Zeng, Taotao [1 ]
He, Zhanglong [1 ]
Zuo, Mingqing [2 ]
Chen, Shuguang [1 ]
Liu, Yuling [1 ]
Fan, Zheqiong [1 ]
He, Hao [1 ]
Kong, Qingyu [3 ]
Zhou, Zeyan [2 ]
Han, Lei [2 ]
机构：
[1] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China
[2] Hunan Univ, Coll Mat Sci & Engn, Hunan Joint Int Lab Adv Mat & Technol Clean Energy, Changsha 410082, Hunan, Peoples R China
[3] SOLEIL Synchrotron, Dept 128, F-91190 St Aubin, France
来源：
CHEMICAL ENGINEERING JOURNAL | 2024年 / 499卷
基金：
中国国家自然科学基金;
关键词：
Single-atomic catalyst; Oxygen reduction reaction; Oxygen evolution reaction; Zinc-air battery; TOTAL-ENERGY CALCULATIONS; ALPHA-MNO2; CATALYST; ELECTROCATALYSTS; NANOPARTICLES; PERFORMANCE; EFFICIENCY; OXIDATION; SURFACE; CARBON;
D O I：
10.1016/j.cej.2024.156051
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Ru-based single-atomic catalysts have shown great potential application in sustainable electrochemical energy conversion/storage devices. Herein Ru single atoms anchored on the surface of MnO2 nanorods (Ru SAs@MnO2) have been successfully constructed by a facile low-temperature solid-phase reaction, which has been confirmed by X-ray adsorption spectra. The synthesized Ru SAs@MnO2 catalyst exhibits a comparable ORR performance with half-wave potential of 0.83 V and a limiting current density of 7.1 mA cm(-2) to commercial Pt/C, and high OER performance with the overpotential of 320 mV at 10 mA cm(-2). Theoretical calculation results indicate that Mn sites and Ru sites of Ru SAs@MnO(2 )act as the catalytic ORR and OER sites, respectively, and the synergistic effect between Ru SAs and MnO2 contributes to the improved catalytic performance via strong electronic interaction. When assembled zinc-air batteries, a maximum power density 230.0 mW cm(-2) could be delivered at 318.5 mA cm(-2).
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页数：8
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