Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (3): 482-489.DOI: 10.1016/S1872-2067(20)63663-4
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Qian Wua,†,*(
), Qingping Gaob,†, Limei Suna, Huanmei Guoa, Xishi Taia, Dan Lia, Li Liua, Chongyi Lingc,#(
), Xuping Sund,$(
)
Received:2020-05-13
Accepted:2020-06-20
Online:2021-03-18
Published:2021-01-23
Contact:
Qian Wu,Chongyi Ling,Xuping Sun
About author:#E-mail:lingchy@seu.edu.cn;Supported by:Qian Wu, Qingping Gao, Limei Sun, Huanmei Guo, Xishi Tai, Dan Li, Li Liu, Chongyi Ling, Xuping Sun. Facilitating active species by decorating CeO2 on Ni3S2 nanosheets for efficient water oxidation electrocatalysis[J]. Chinese Journal of Catalysis, 2021, 42(3): 482-489.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(20)63663-4
Fig. 1. (a) XRD patterns of Ni3S2/NF and Ni3S2-CeO2/NF; SEM images of Ni3S2/NF (b) and Ni3S2-CeO2/NF (c); (d) TEM image of Ni3S2-CeO2; (e,f) HRTEM images of Ni3S2-CeO2.
Fig.3. (a) LSV curves for bare NF,RuO2/NF,CeO2/NF,Ni3S2/NF and Ni3S2-CeO2/NF at 5 mV s-1 scan rate in 1.0 M KOH; (b) Tafel plots of RuO2/NF,CeO2/NF,Ni3S2/NF and Ni3S2-CeO2/NF; (c) LSV curves for Ni3S2-CeO2/NF before and after 500 and 1000 cycles; (d) Time-dependent current density curves for Ni3S2-CeO2/NF in 1.0 M KOH.
Fig. 4. (a) Nyquist plots of CeO2/NF,Ni3S2/NF and Ni3S2-CeO2/NF with an equivalent circuit; (b) The calculated Cdl; (c) Oxidation peak current versus scan rate plots; (d) TOF plots for CeO2/NF,Ni3S2/NF and Ni3S2-CeO2/NF.
Fig. 5. (a) Calculated free energy diagrams for OER on CeO2,Ni3S2 and CeO2/Ni3S2 surfaces,as presented by red,black and blue lines,respectively. Structures of the reaction intermediates through the OER process on CeO2 (b),Ni3S2 (c) and CeO2/Ni3S2 (d) surfaces. Blue,yellow,offwhite,red and white balls represent the Ni,S,Ce,O and H atoms,respectively.
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