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Wang F, Li Y, Zhang R, Liu H, Zhang Y, Zheng X, Zhang J, Chen C, Zheng S, Xin HL. Activating Single-Atom Ni Site via First-Shell Si Modulation Boosts Oxygen Reduction Reaction. Small 2023; 19:e2206071. [PMID: 36504446 DOI: 10.1002/smll.202206071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 11/24/2022] [Indexed: 06/17/2023]
Abstract
Atomically dispersed nitrogen-coordinated 3d transition-metal site on carbon support (M-NC) are promising alternatives to Pt group metal-based catalysts toward oxygen reduction reaction (ORR). However, despite the excellent activities of most of M-NC catalysts, such as Fe-NC, Co-NC et al., their durability is far from satisfactory due to Fenton reaction. Herein, this work reports a novel Si-doped Ni-NC catalyst (Ni-SiNC) that possesses high activity and excellent stability. X-ray absorption fine structure and aberration-corrected transmission electron microscopy uncover that the single-atom Ni site is coordinated with one Si atom and three N atoms, constructing Ni-Si1 N3 moiety. The Ni-SiNC catalyst exhibits a half-wave potential (E1/2 ) of 0.866 V versus RHE, with a distinguished long-term durability in alkaline media of only 10 mV negative shift in E1/2 after 35 000 cycles, which is also validated in Zn-air battery. Density functional theory calculations reveal that the Ni-Si1 N3 moiety facilitates ORR kinetics through optimizing the adsorption of intermediates.
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Affiliation(s)
- Fangqing Wang
- Key Laboratory of Special Functional Materials for Ecological Environment and Information, Ministry of Education, School of Material Science and Engineering, Hebei University of Technology, Tianjin, 300130, P. R. China
| | - Ying Li
- Key Laboratory of Special Functional Materials for Ecological Environment and Information, Ministry of Education, School of Material Science and Engineering, Hebei University of Technology, Tianjin, 300130, P. R. China
| | - Rui Zhang
- Department of Physics and Astronomy, University of California, Irvine, CA, 92697, USA
| | - Hui Liu
- Key Laboratory of Special Functional Materials for Ecological Environment and Information, Ministry of Education, School of Material Science and Engineering, Hebei University of Technology, Tianjin, 300130, P. R. China
| | - Yangyang Zhang
- Key Laboratory of Special Functional Materials for Ecological Environment and Information, Ministry of Education, School of Material Science and Engineering, Hebei University of Technology, Tianjin, 300130, P. R. China
| | - Xuerong Zheng
- School of Materials Science and Engineering, Tianjin University, Tianjin Haihe Education Park, Tianjin, 300072, P. R. China
| | - Jun Zhang
- Key Laboratory of Special Functional Materials for Ecological Environment and Information, Ministry of Education, School of Material Science and Engineering, Hebei University of Technology, Tianjin, 300130, P. R. China
| | - Cong Chen
- Key Laboratory of Special Functional Materials for Ecological Environment and Information, Ministry of Education, School of Material Science and Engineering, Hebei University of Technology, Tianjin, 300130, P. R. China
| | - Shijian Zheng
- Key Laboratory of Special Functional Materials for Ecological Environment and Information, Ministry of Education, School of Material Science and Engineering, Hebei University of Technology, Tianjin, 300130, P. R. China
| | - Huolin L Xin
- Department of Physics and Astronomy, University of California, Irvine, CA, 92697, USA
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