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Xu H, Li R, Liu H, Sun W, Bai J, Lu X, Yang P. Nitrogen, sulfur co-coordinated iron single-atom catalysts with the optimized electronic structure for highly efficient oxygen reduction in Zn-air battery and fuel cell. J Colloid Interface Sci 2024; 671:643-652. [PMID: 38820848 DOI: 10.1016/j.jcis.2024.05.197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/10/2024] [Accepted: 05/26/2024] [Indexed: 06/02/2024]
Abstract
Atomically dispersed iron-nitrogen-carbon (FesbndNsbndC) materials have been considered ideal catalysts for the oxygen reduction. Unfortunately, designing and adjusting the electronic structure of single-atom Fe sites to boost the kinetics and activity still faces grand challenges. In this work, the coordination environment engineering is developed to synthesize the FeSA/NSC catalyst with the tailored N, S co-coordinated Fe atomic site (Fe-N3S site). The structural characterizations and theoretical calculations demonstrate that the incorporation of sulfur can optimize the charge distribution of Fe atoms to weaken the adsorption of OH* and facilitate the desorption of OH*, thus leading to enhanced kinetics process and intrinsic activity. As a result, the S-modified FeSA/NSC exhibits outstanding catalytic activity with the half-wave potentials (E1/2) of 0.915 V and 0.797 V, as well as good stability, in alkaline and acidic electrolytes, respectively. Impressively, the excellent performance of FeSA/NSC is further confirmed in Zn-air batteries (ZABs) and fuel cells, with high peak power densities (146 mW cm-2 and 0.259 W cm-2).
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Affiliation(s)
- Hao Xu
- College of Chemical Engineering, Inner Mongolia University of Technology, 010051 Hohhot, China; Inner Mongolia Key Laboratory of Industrial Catalysis, 010051 Hohhot, China
| | - Ruopeng Li
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, 150001 Harbin, China.
| | - Huan Liu
- College of Chemical Engineering, Inner Mongolia University of Technology, 010051 Hohhot, China; Inner Mongolia Key Laboratory of Industrial Catalysis, 010051 Hohhot, China
| | - Weiyan Sun
- College of Chemical Engineering, Inner Mongolia University of Technology, 010051 Hohhot, China; Inner Mongolia Key Laboratory of Industrial Catalysis, 010051 Hohhot, China
| | - Jie Bai
- College of Chemical Engineering, Inner Mongolia University of Technology, 010051 Hohhot, China; Inner Mongolia Key Laboratory of Industrial Catalysis, 010051 Hohhot, China.
| | - Xiangyu Lu
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, 150001 Harbin, China
| | - Peixia Yang
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, 150001 Harbin, China.
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Chen J, Li R, Li B, Hu A, He M, Zhou B, Fan Y, Yan Z, Pan Y, Yang B, Li T, Li K, Li B, Long J. Engineering dual-crystal configurations in perovskite oxides boosts electrocatalysis of lithium-oxygen batteries. J Colloid Interface Sci 2024; 657:384-392. [PMID: 38056043 DOI: 10.1016/j.jcis.2023.11.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 11/13/2023] [Accepted: 11/28/2023] [Indexed: 12/08/2023]
Abstract
Sculpting crystal configurations can vastly affect the charge and orbital states of electrocatalysts, fundamentally determining the catalytic activity of lithium-oxygen (Li-O2) batteries. However, the crucial role of crystal configurations in determining the electronic states has usually been neglected and needs to be further examined. Herein, we introduce orthorhombic and trigonal system into 0.5La0.6Sr0.4MnO3-0.5LaMn0.6Co0.4O3 (LSMCO) by selectively incorporating Sr and Co cations into the LaMnO3 framework during the sol-gel process, which is used to explore the relationship among crystal structure, electronic states and catalytic performance. Based on both experimental and theoretical calculations, the dual-crystal configurations induce strong lattice distortion, which promotes MnO6 octahedra vibration and shortened MnO bonds. Furthermore, the suppressed Jahn-Teller distortion weakens the orbital arrangement and accelerates the charge delocalization, leading to the conversion of Mn3+ to Mn4+ and optimized electronic states. Ultimately, this resulted in optimized Mn 3d and O 2p orbital hybridization and activated lattice oxygen function, leading to a significant improvement in electrocatalytic activity. The LSMCO catalyzed Li-O2 battery achieves enhanced discharge capacity of 14498.7 mAh/g and cycling stability of 258 cycles. This work highlights the significance of inner structure and presents a feasible strategy for engineering crystal configurations to boost electrocatalysis of Li-O2 batteries.
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Affiliation(s)
- Jiahao Chen
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Runjing Li
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Bin Li
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Anjun Hu
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China; College of Computer Science and Cyber Security, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China.
| | - Miao He
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, PR China
| | - Bo Zhou
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Yining Fan
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Zhongfu Yan
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Yu Pan
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Borui Yang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Ting Li
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Kun Li
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Baihai Li
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, PR China
| | - Jianping Long
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China.
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