Synthesis of Mo2C/ZnIn2S4 composite and its efficient photocatalytic hydrogen evolution activity

LIU Chao; XIE Xiao-qi; FAN Peng-kai; LI Yan

doi:10.19906/j.cnki.JFCT.2022021

Volume 50 Issue 8

Aug. 2022

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LIU Chao, XIE Xiao-qi, FAN Peng-kai, LI Yan. Synthesis of Mo2C/ZnIn2S4 composite and its efficient photocatalytic hydrogen evolution activity[J]. Journal of Fuel Chemistry and Technology, 2022, 50(8): 1075-1083. doi: 10.19906/j.cnki.JFCT.2022021

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LIU Chao, XIE Xiao-qi, FAN Peng-kai, LI Yan. Synthesis of Mo₂C/ZnIn₂S₄ composite and its efficient photocatalytic hydrogen evolution activity[J]. Journal of Fuel Chemistry and Technology, 2022, 50(8): 1075-1083. doi: 10.19906/j.cnki.JFCT.2022021

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Synthesis of Mo₂C/ZnIn₂S₄ composite and its efficient photocatalytic hydrogen evolution activity

doi: 10.19906/j.cnki.JFCT.2022021

LIU Chao^{1, 2
,
,},
XIE Xiao-qi¹,
FAN Peng-kai¹,
LI Yan^{1, 2}

1.
School of Gemmology and Material Science, Hebei GEO University, Shijiazhuang 050031, China
2.
Engineering Research Center for Silicate Solid Waste Resource Utilization of Hebei Province, Hebei GEO University, Shijiazhuang 050031, China

Funds: The project was supported by Natural Science Foundation of Hebei Province (B2016403011, B2020208009) and Natural Science Research Major Project in University of Hebei Province (ZD2017012).

More Information

Corresponding author: Tel: 13931157532，E-mail: yikeschao@126.com
Received Date: 2022-02-14
Accepted Date: 2022-03-25
Rev Recd Date: 2022-03-22

Available Online: 2022-04-06

Publish Date: 2022-08-26

Abstract

Abstract

Mo₂C was synthesized by a high temperature solid state method using ammonium molybdate ((NH₄)₆Mo₇O₂₄·4H₂O) and dicyanodiamine (C₂H₄N₄) as rawmaterials, then Mo₂C/ZnIn₂S₄ composite was prepared by in-situ growth method. The composition, structure and properties of the materials were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), UV-vis diffuse reflection (UV-vis) and Kelvin probe (KP). The results show that ZnIn₂S₄ grows in-situ on the surface of Mo₂C particles and forms Mo₂C/ZnIn₂S₄ heterojunctions. The hydrogen evolution rate of Mo₂C/ZnIn₂S₄ composite reaches 1.33 mmol/g/h, which is 5.1 times to that of bare ZnIn₂S₄. The photocatalytic mechanism analysis shows that Mo₂C, as a cocatalyst, has metallic properties, high conductivity and high surface work function. After Mo₂C/ZnIn₂S₄ heterogeneous interface formed between Mo₂C and ZnIn₂S₄, the Mo₂C/ZnIn₂S₄ composite can effectively promote the separation and migration rate of photogenerated charges in ZnIn₂S₄. Meanwhile, Mo₂C becomes the active site of hydrogen evolution reaction due to its low hydrogen evolution overpotential, which effectively reduces the overpotential of ZnIn₂S₄ in hydrogen evolution reaction, and subsequently improves the photocatalytic hydrogen evolution activity of the composite material.
- Mo₂C,
- Co-catalyst,
- ZnIn₂S₄,
- in-situ recombination,
- photocatalytic hydrogen evolution

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References(30)

References

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