Acta Phys. -Chim. Sin. ›› 2024, Vol. 40 ›› Issue (11): 2406024.doi: 10.3866/PKU.WHXB202406024
Special Issue: Solar fuel preparation
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Construction of Electron Bridge and Activation of MoS2 Inert Basal Planes by Ni Doping for Enhancing Photocatalytic Hydrogen Evolution
Qin Hu1, Liuyun Chen1, Xinling Xie1, Zuzeng Qin1, Hongbing Ji1,2, Tongming Su1,*(
)
- 1 Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
2 Institute of Green Petroleum Processing and Light Hydrocarbon Conversion, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
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Received:2024-06-20Revised:2024-07-20Accepted:2024-07-22Published:2024-10-14 -
Contact:Email: sutm@gxu.edu.cn (Tongming Su) -
Supported by:the National Natural Science Foundation of China(22208065); Guangxi Natural Science Foundation(2022GXNSFBA035483); Opening Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology(2023K012); Special Funding for 'Guangxi Bagui Scholars'
Cite this article
Qin Hu, Liuyun Chen, Xinling Xie, Zuzeng Qin, Hongbing Ji, Tongming Su. Construction of Electron Bridge and Activation of MoS2 Inert Basal Planes by Ni Doping for Enhancing Photocatalytic Hydrogen Evolution[J]. Acta Phys. -Chim. Sin. 2024, 40(11), 2406024. doi: 10.3866/PKU.WHXB202406024
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Fig 1
Schematic illustration of the synthesis of the Nix-MoS2/ZnIn2S4 composite (A). SEM images of Ni0.08-MoS2 (B), ZnIn2S4 (C), and Ni0.08-MoS2/ZnIn2S4 (D). XRD patterns of ZnIn2S4, MoS2/ZnIn2S4, Nix-MoS2/ZnIn2S4 (E), MoS2 and Nix-MoS2 (F)."
Fig 1
Fig 2
TEM images and HRTEM images of Ni0.08-MoS2 (A, B, C), ZnIn2S4 (D, E, F), and Ni0.08-MoS2/ZnIn2S4 (G, H, I). HAADF-STEM image and corresponding EDS element (Zn, In, S, Mo, and Ni) mapping of Ni0.08-MoS2/ZnIn2S4 (J). EPR spectra of ZnIn2S4, MoS2, Ni0.08-MoS2, and Ni0.08-MoS2/ZnIn2S4 (K)."
Fig 2
Fig 3
High-resolution XPS spectra of Zn 2p (A), In 3d (B), S 2p (C), and Mo 3d (D) in ZnIn2S4, MoS2/ZnIn2S4, and Ni0.08-MoS2/ZnIn2S4."
Fig 3
Fig 4
UV-Vis diffuse reflectance spectra of ZnIn2S4, MoS2/ZnIn2S4, and Nix-MoS2/ZnIn2S4 (the inset shows the band gap values of ZnIn2S4 calculated by the Kubelka–Munk equation) (A). EIS Nyquist plots (B), PL spectra (C), and TRPL decay spectra (D) of ZnIn2S4, MoS2/ZnIn2S4, and Ni0.08-MoS2/ZnIn2S4. EPR spectra of radical adduct signals labeled by DMPO for ·O2− (E) and ·OH (F) of ZnIn2S4 and Ni0.08-MoS2/ZnIn2S4."
Fig 4
Fig 5
2D mapping fs-TA spectra of ZnIn2S4 (A) and Ni0.08-MoS2/ZnIn2S4 (D). fs-TAS spectra at different delay times for ZnIn2S4 (B) and Ni0.08-MoS2/ZnIn2S4 (E). Kinetic delay curves fitted at500 nm for ZnIn2S4 (C) and Ni0.08-MoS2/ZnIn2S4 (F)."
Fig 5
Fig 6
Time course of photocatalytic H2 production performance (A) and the photocatalytic H2 production rate (B) of ZnIn2S4, MoS2/ZnIn2S4, and Nix-MoS2/ZnIn2S4. Dependence of apparent quantum yield (AQY) as a function of incident irradiation wavelength and diffuse reflectance spectra of Ni0.08-MoS2/ZnIn2S4 (C). Cyclic experiments of photocatalytic H2 production over ZnIn2S4, MoS2/ZnIn2S4, and Ni0.08-MoS2/ZnIn2S4 (D)."
Fig 6
Fig 7
Electrostatic potentials of ZnIn2S4-Sv (A), MoS2 (B), and Ni-MoS2-Sv (C). Electron density differences between the Ni-MoS2-Sv/ZnIn2S4-Sv interface (D) and the Ni-MoS2-Sv surface (E); the yellow and blue areas in (D) and (E) represent the accumulation and loss of electrons, respectively. The optimized model and corresponding electron localization function (ELF) maps of H2O adsorption at different sites of S vacancies (F), Ni―S1 bonds (G), and Ni―S2 bonds (H) on the Ni-MoS2-Sv surface. Hydrogen adsorption free energy of MoS2 (I) and ZnIn2S4-Sv, Nix-MoS2, and MoS2-Sv (J)."
Fig 7
Fig 8
The valence band and secondary electron cutoff of ZnIn2S4 (A), MoS2 and Ni0.08-MoS2 (B) with respect to the Fermi level (EF), which were measured by UPS spectra. Energy scheme before and after contact with ZnIn2S4 and Ni0.08-MoS2 (C). Schematic illustration of the photocatalytic hydrogen production mechanism over Ni0.08-MoS2/ZnIn2S4 (D)."
Fig 8
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