Chinese Journal of Catalysis ›› 2023, Vol. 50: 352-360.DOI: 10.1016/S1872-2067(23)64460-2

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Reshaping the coordination and electronic structure of single atom sites on the right branch of ORR volcano plot

Liyuan Gonga,b,c,1, Ying Wangd,1, Jie Liua,b,c,1, Xian Wanga,b,c, Yang Lia,b,c, Shuai Houa,c, Zhijian Wud, Zhao Jina,c,*(), Changpeng Liua,b,c, Wei Xinga,b,c,*(), Junjie Gea,b,e,*()   

  1. aState Key Laboratory of Electroanalytical Chemistry, Jilin Province Key Laboratory of Low Carbon Chemical Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China
    bUniversity of Science and Technology of China, Hefei 230026, Anhui, China
    cLaboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China
    dState Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China
    eDalian National Laboratory for Clean Energy, Dalian 116023, Liaoning, China
  • Received:2023-04-05 Accepted:2023-05-08 Online:2023-07-18 Published:2023-07-25
  • Contact: *E-mail: zjin@ciac.ac.cn (Z. Jin), xingwei@ciac.ac.cn (W. Xing), gejunjie@ustc.edu.cn (J. Ge).
  • About author:

    1 Contributed to this work equally.

  • Supported by:
    National Key R&D Program of China(2022YFB4004100);National Natural Science Foundation of China(21875243);National Natural Science Foundation of China(21733004);Science and Technology Service Network Initiative of CAS(KFJ-STS-ZDTP-088);Jilin Province Science and Technology Development Program(20190201270JC);Jilin Province Science and Technology Development Program(20190201300JC);Jilin Province Science and Technology Development Program(20200201001JC);Special Funds for Guiding Local Scientific and Technological Development by the Central Government(2020JH6/10500021);Dalian National Laboratory for Clean Energy (DNL), CAS, the Research Innovation Fund(DNL202010)

Abstract:

The coordination environment of atomic metal sites in single atom catalysts is of vital significance in tailoring the d-orbital states and thus the catalytic behavior towards oxygen reduction reaction (ORR), thereby offering great promise to boost activity via regulating the local chelation structure. Herein we designed a carbon coordination environment for the atomic M sites reside on the right leg of the volcano plot, to effectively counter balance the low adsorption energy of the metal center to oxygen species. Combining time-of-flight secondary ion mass spectrometry and density functional theory calculations, we unveiled the M-C coordination structure and the thus induced changes in electronic structure and ORR catalytic behavior. The reshape in coordination structure, i.e., the replacement of typical nitrogen coordination by low electronegativity carbon coordination, gives rise to exceptional intrinsic activity towards ORR. This work brings a new perspective to boost the activity of single atom catalysts on the weak bonding leg, with exceptional ORR activity being further expected through advancing the chelation structure.

Key words: Oxygen reduction reaction, Single atom catalyst, Coordination environment, Electronic structure, Adsorption energy of reaction intermediate