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    Energy barrier engineering of oxygen reduction reaction synergistically promoted by binary Zn-Cu pair sites for advanced Zn–air batteries

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    Type
    Article
    Authors
    Qian, Mancai
    Guo, Man
    Qu, Yuan
    Xu, Meijiao
    Liu, Datai
    Hou, Cheng
    Isimjan, Tayirjan T.
    Yang, Xiulin
    KAUST Department
    Saudi Arabia Basic Industries Corporation (SABIC) at King Abdullah University of Science and Technology (KAUST), Thuwal 23955–6900, Saudi Arabia
    KAUST Solar Center (KSC)
    Date
    2022-03-16
    Embargo End Date
    2024-03-16
    Permanent link to this record
    http://hdl.handle.net/10754/676346
    
    Metadata
    Show full item record
    Abstract
    Reducing the oxygen adsorption energy barrier is vital to accelerate the oxygen reduction reaction (ORR). Herein, we report a mesoporous cake-like structured Zn-N/Cu-N electrocatalyst (ZnCu-N-C) with robust electrocatalytic performance and exceptional durability in 0.1 M KOH solution. The mesoporous cake-like structure is promising to expose more active sites. Extended X-ray absorption fine spectroscopy and X-ray photoelectron spectroscopy confirmed the existence of M-Nx (M = Zn, Cu). More importantly, the density functional theory (DFT) calculations corroborate that the Zn-N/Cu-N dual active center can reduce the oxygen adsorption energy barrier. Therefore, the optimized ZnCu-N-C electrocatalyst is ahead of commercial Pt/C (20 wt%) in all aspects. Moreover, the ZnCu-N-C-based Zn–air batteries exhibit outstanding long-term stability of 240 cycles, a large power density of 156.2 mW cm−2, and a high specific capacity of 732.7 mA h g−1. This work may provide new guidance for the rational design of cathode catalysts in Zn-air batteries.
    Citation
    Qian, M., Guo, M., Qu, Y., Xu, M., Liu, D., Hou, C., Isimjan, T. T., & Yang, X. (2022). Energy barrier engineering of oxygen reduction reaction synergistically promoted by binary Zn-Cu pair sites for advanced Zn–air batteries. Journal of Alloys and Compounds, 907, 164527. https://doi.org/10.1016/j.jallcom.2022.164527
    Sponsors
    Supported by the National Natural Science Foundation of China (no.21965005), Natural Science Foundation of Guangxi Province (2018GXNSFAA294077, 2021GXNSFAA076001), Project of High-Level Talents of Guangxi (F-KA18015), and Guangxi Technology Base and Talent Subject (GUIKE AD18126001, GUIKE AD20297039)
    Publisher
    Elsevier BV
    Journal
    Journal of Alloys and Compounds
    DOI
    10.1016/j.jallcom.2022.164527
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0925838822009185
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.jallcom.2022.164527
    Scopus Count
    Collections
    Articles; KAUST Solar Center (KSC)

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