In situ XPS proved efficient charge transfer and ion adsorption of ZnCo2O4/CoS S-Scheme heterojunctions for photocatalytic hydrogen evolution

Jin, Zhiliang; Wang, Xuanpu

doi:10.1016/j.mtener.2022.101164

Cited by 20 publications

(14 citation statements)

References 33 publications

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“…The magnitude of the resistance to charge transfer was determined by testing the arc radius of the electrochemical impedance spectrum (EIS). [ 60,61 ] In Figure a,b, NAT possesses a smaller arc radius than NA, and ZCSNAT‐20 and ZCSNA‐20 exhibit the same situation. It indicates that Ti 3 C 2 can reduce the resistance of the electrode surface when charge transfer occurs.…”

Section: Resultsmentioning

confidence: 93%

Ti₃C₂ MXene Induced Efficient Electron Transfer over Bimetallic Sulfides and Layered Double Hydroxides

Jin

2023

Advanced Sustainable Systems

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With a large specific surface area and remarkable electrochemical capabilities, NiAl‐LDH is widely used in photocatalysis. The electrochemical performance of NiAl‐LDH can be further improved by introducing the appropriate amount of Ti3C2 MXene by hydrothermal method. And NiAl‐LDH@Ti3C2 is simply compounded with ZnCdS in a certain ratio to obtain ZnCdS/NiAl‐LDH@Ti3C2. By studying different ratios of ZCSNAT, the optimal ratio of hydrogen evolution activity is 27.10 mmol g−1 h−1 under alkaline solution, which is 9.96 and 1.67 times higher than ZCS and ZnCdS/NiAl‐LDH‐20, while ZnCdS/NiAl‐LDH@Ti3C2‐20 reaches 1883 µmol (37.66 mmol g−1 h−1) in acidic solution, 13.84 and 2.32 times higher than ZnCdS and ZnCdS/NiAl‐LDH‐20. This apparent enhancement is mainly due to the doping of Ti3C2 in the NiAl‐LDH preparation to achieve improved electrochemical properties of NiAl‐LDH. The better electron induction effect of NiAl‐LDH@Ti3C2 greatly improves the electron mobility to the NA surface, which results in a higher photogenerated electron–hole separation efficiency of the composite catalyst based on the original one.

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Section: Resultsmentioning

confidence: 93%

Ti₃C₂ MXene Induced Efficient Electron Transfer over Bimetallic Sulfides and Layered Double Hydroxides

Jin

2023

Advanced Sustainable Systems

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“…27 As in the Sn 3d spectrum, the Co 2p spectrum of 0.5SnO 2 /0.5CoS 1.097 also shifts to lower binding energies, which demonstrates the formation of a heterojunction. 28 From the S 2p spectra in Fig. 3e, the peaks at 161.3 eV and 162.4 eV are ascribed to S 2p 3/2 and S 2p 1/2 in the CoS 1.097 , but the relative ratio between S 2p 3/2 and S 2p 1/2 has changed in the 0.5SnO 2 /0.5CoS 1.097 .…”

Section: Resultsmentioning

confidence: 94%

SnO₂/CoS_1.097 heterojunction as a green electrocatalyst for hydrogen evolution linking to assistant glycerol oxidation

Xie,

Zhang,

Xiang

et al. 2023

Green Chem.

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“…As MoS 2 /Co 3 O 4 is a photo-excited photocatalyst, it owned a broad absorption capability of wavelength. Eg1 is connected to the approach of the O(II)-Co(III) excitations [25]. The largest signal wavelength of MoS 2 /Co 3 O 4 increased to 560 nm.…”

Section: Uv-vis Spectra Analysismentioning

confidence: 94%

S-Scheme System of MoS2/Co3O4 Nanocomposites for Enhanced Photocatalytic Hydrogen Evolution and Methyl Violet Dye Removal under Visible Light Irradiation

Tien

Chen

2023

Coatings

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Photocatalytic hydrogen production joined with simultaneous organic compound removal is a potential but challenging approach for both environmental modification and reusable energy generation. In this study, we designed a nanocomposite method for the fabrication of MoS2/Co3O4 heterojunction with an extremely productive photocatalytic capability. The as-fabricated MoS2/Co3O4 nanocomposites displayed greatly enhanced the hydrogen production (3825 μmol/g/h) and methyl violet dye (MV) contaminant removal (apparent kinetic constant of 0.038 min−1) activity. The nanocomposites’ structures had a better specific surface area, numerous active sites, and enhanced the transport ability of charge carriers to promote the photocatalytic activity. The increase in Co3O4 improved the visible-light absorption efficiency and narrowed energy bandgap and served as a highway for charge carriers to facilitate the transfer and separation and inhibit the combination of photoinduced charge carriers. The migration route of the photoexcited charges, the formation pathway, and the function of various reactive oxygen species (such as O2− and .OH) are discussed. The optimized energy band structure and high electron transfer rate of the S-scheme heterojunction nanocomposite promotes the evolution of H2 and the removal of pollutants, which shows an excellent potential in a stable and efficient photocatalytic hydrogen evolution and environment remediation.

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In situ XPS proved efficient charge transfer and ion adsorption of ZnCo2O4/CoS S-Scheme heterojunctions for photocatalytic hydrogen evolution

Cited by 20 publications

References 33 publications

Ti₃C₂ MXene Induced Efficient Electron Transfer over Bimetallic Sulfides and Layered Double Hydroxides

Ti₃C₂ MXene Induced Efficient Electron Transfer over Bimetallic Sulfides and Layered Double Hydroxides

SnO₂/CoS_1.097 heterojunction as a green electrocatalyst for hydrogen evolution linking to assistant glycerol oxidation

S-Scheme System of MoS2/Co3O4 Nanocomposites for Enhanced Photocatalytic Hydrogen Evolution and Methyl Violet Dye Removal under Visible Light Irradiation

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In situ XPS proved efficient charge transfer and ion adsorption of ZnCo2O4/CoS S-Scheme heterojunctions for photocatalytic hydrogen evolution

Cited by 20 publications

References 33 publications

Ti3C2 MXene Induced Efficient Electron Transfer over Bimetallic Sulfides and Layered Double Hydroxides

Ti3C2 MXene Induced Efficient Electron Transfer over Bimetallic Sulfides and Layered Double Hydroxides

SnO2/CoS1.097 heterojunction as a green electrocatalyst for hydrogen evolution linking to assistant glycerol oxidation

S-Scheme System of MoS2/Co3O4 Nanocomposites for Enhanced Photocatalytic Hydrogen Evolution and Methyl Violet Dye Removal under Visible Light Irradiation

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Ti₃C₂ MXene Induced Efficient Electron Transfer over Bimetallic Sulfides and Layered Double Hydroxides

Ti₃C₂ MXene Induced Efficient Electron Transfer over Bimetallic Sulfides and Layered Double Hydroxides

SnO₂/CoS_1.097 heterojunction as a green electrocatalyst for hydrogen evolution linking to assistant glycerol oxidation