Chinese Journal of Catalysis ›› 2023, Vol. 50: 352-360.DOI: 10.1016/S1872-2067(23)64460-2
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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,*()
Received:
2023-04-05
Accepted:
2023-05-08
Online:
2023-07-18
Published:
2023-07-25
Contact:
*E-mail: About author:
1 Contributed to this work equally.
Supported by:
Liyuan Gong, Ying Wang, Jie Liu, Xian Wang, Yang Li, Shuai Hou, Zhijian Wu, Zhao Jin, Changpeng Liu, Wei Xing, Junjie Ge. Reshaping the coordination and electronic structure of single atom sites on the right branch of ORR volcano plot[J]. Chinese Journal of Catalysis, 2023, 50: 352-360.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(23)64460-2
Fig. 1. (a) Synthetic scheme for the preparation of M-C and M-N-C samples; the HAADF-STEM image of Ir-N-C (b), Ir-C (c), Pd-N-C (d), Pd-C (e), Pt-N-C (f), and Pt-C (g).
Fig. 3. Characteristic fragment of varied catalysts detected by ToF-SIMS. IrN4 (a), IrC4 (b), PdN2 (c) of M-N-C catalysts, and PdC4 (d), PtN4 (e), PtC4 (f) of M-C catalysts.
Fig. 4. (a) The LSV curves of Ir SACs. (b) Comparison of E1/2 of Ir based catalysts. (c) The LSV curves of Pd SACs catalysts. (d) Comparison of the Eonset of Pd SACs. (e) The LSV curves of Pt SACs. (f) Comparison of the Eonset of Pt SACs. RDE and RRDE measurements were conducted by CV in 0.1 -1.1 V at a scan rate of 10 mV s-1 at 1600 r min-1 in O2 saturated 0.1 mol L-1 HClO4.
Fig. 5. (a-c) Gibbs free energy diagrams on various sites. (d-f) ORR theoretical onset potential (fitting) versus ΔGOH* on various sites. (g-i) ΔGOH* and ORR theoretical onset potential (exact) versus Bader charge for various sites. The blue symbols are corresponding to ΔGOH* and the red symbols correspond to theoretical onset potential. The circular symbols represent the MCX site and the star symbols represent the MNX site. The insert picture is charge density difference, cyan and yellow areas represent charge density increase and decrease, respectively.
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