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In Situ Synthesis of Mo2C Nanoparticles on Graphene Nanosheets for Enhanced Photocatalytic H2-Production Activity of TiO2

  • Jinfeng Liu
    Jinfeng Liu
    School of Materials Science and Engineering, Wuhan University of Technology, 122# Luoshi Road, Wuhan 430070, PR China
    More by Jinfeng Liu
  • Ping Wang*
    Ping Wang
    School of Materials Science and Engineering, Wuhan University of Technology, 122# Luoshi Road, Wuhan 430070, PR China
    School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 122# Luoshi Road, Wuhan 430070, PR China
    *Email: [email protected]. Phone: +86(27)87756779-8303.
    More by Ping Wang
  • Jiajie Fan
    Jiajie Fan
    School of Materials Science and Engineering, Zhengzhou University, 100# Science Avenue, Zhengzhou 450002, PR China
    More by Jiajie Fan
  • Huogen Yu*
    Huogen Yu
    School of Materials Science and Engineering, Wuhan University of Technology, 122# Luoshi Road, Wuhan 430070, PR China
    School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 122# Luoshi Road, Wuhan 430070, PR China
    *Email: [email protected]. Phone: 0086-27-87756662. Fax: 0086-27-87879468.
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  • , and 
  • Jiaguo Yu
    Jiaguo Yu
    State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, 122# Luoshi Road, Wuhan 430070, PR China
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Cite this: ACS Sustainable Chem. Eng. 2021, 9, 10, 3828–3837
Publication Date (Web):March 2, 2021
https://doi.org/10.1021/acssuschemeng.0c08903
Copyright © 2021 American Chemical Society
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Abstract

Molybdenum carbide (Mo2C) has been proven to be the most promising candidate for the H2-evolution cocatalyst due to the similar H+-adsorption ability to Pt. However, owing to its limited electrical conductivity, the Mo2C-modified photocatalysts usually exhibit a low H2-evolution performance. Considering the perfect electron mobility of graphene nanosheets, in this article, Mo2C nanoparticles (ca. 5 nm) were in-situ and evenly grown on the reduced graphene oxide (rGO) to prepare the graphene-modified Mo2C (rGO-Mo2C) nanoparticles to improve the photocatalytic hydrogen-generation rate of TiO2. Herein, the rGO-Mo2C is obtained by the direct calcination of graphene oxide (GO) as the carbon source and (NH4)6Mo7O24 at 800 °C, which is further coupled with the TiO2 to synthesize the efficient TiO2/rGO-Mo2C photocatalyst. The greatest hydrogen-generation activity of TiO2/rGO-Mo2C achieved 880 μmol h–1 g–1 (AQE = 2.64%), which was 5.5 and 88 times higher than that of TiO2/rGO and TiO2, respectively. The boosted performance of TiO2/rGO-Mo2C can be attributed to the synergetic action that the rGO nanosheets can act as electron media to promote the photoelectron transfer, and the Mo2C nanoparticles can serve as active centers to improve the interfacial hydrogen-generation reaction. This work can provide a new synthesis strategy for the design of efficient cocatalysts for potential applications.

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The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acssuschemeng.0c08903.

  • Materials; preparation of conventional Mo2[email protected] and TiO2/Mo2[email protected] (0.5 wt %) nanoparticles; characterization; photoelectrochemical measurements; measurement of photocatalytic hydrogen evolution; fitting method of fluorescent lifetime of the samples; nitrogen adsorption–desorption isotherm of various samples and the corresponding specific surface areas and pore volumes; AQE of various photocatalysts; XRD patterns of rGO-Mo2C and Mo2[email protected]; photocatalytic H2-evolution activity of TiO2/rGO-Mo2C (0.5 wt %) and TiO2/Mo2[email protected] (0.5 wt %); XRD patterns, Raman spectra, FTIR spectra, and UV–vis spectra for the TiO2/rGO-Mo2C (0.5 wt %) sample before and after photocatalytic H2 evolution; EIS spectra of Mo2[email protected] and rGO-Mo2C; LSV curves of rGO and rGO-Mo2C; SPV spectra and EPR spectra of various samples (PDF)

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This article is cited by 8 publications.

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  2. Duoduo Gao, Binbin Zhao, Feng Chen, Huogen Yu, Jiajie Fan, Jiaguo Yu. Selenium-Rich Configuration and Amorphization for Synergistically Maximizing the Active-Center Amount of CoSe1+x Nanodots toward Efficient Photocatalytic H2 Evolution. ACS Sustainable Chemistry & Engineering 2021, 9 (25) , 8653-8662. https://doi.org/10.1021/acssuschemeng.1c02767
  3. Lin Dong, Ping Wang, Huogen Yu. EDTA-assisted synthesis of amorphous BiS nanodots for improving photocatalytic hydrogen-evolution rate of TiO2. Journal of Alloys and Compounds 2021, 887 , 161425. https://doi.org/10.1016/j.jallcom.2021.161425
  4. Lulu Gao, Jinfeng Liu, Haoyu Long, Ping Wang, Huogen Yu. One-step calcination synthesis of WC–Mo 2 C heterojunction nanoparticles as novel H 2 -production cocatalysts for enhanced photocatalytic activity of TiO 2. Catalysis Science & Technology 2021, 11 (22) , 7307-7315. https://doi.org/10.1039/D1CY01581H
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  6. Ping Wang, Pinsi Deng, Yanjie Cao. Edge-sulfonated graphene-decorated TiO2 photocatalyst with high H2-evolution performance. International Journal of Hydrogen Energy 2021, 30 https://doi.org/10.1016/j.ijhydene.2021.10.095
  7. Cui Kong, Fengjun Zhang, Yingrui Wang, Jing Huang. Synthesis and photocatalytic hydrogen activity of Mo1−xS2 nanosheets with controllable Mo vacancies. Journal of Alloys and Compounds 2021, 876 , 160165. https://doi.org/10.1016/j.jallcom.2021.160165
  8. Zhen Tian, Xi Yang, Yufang Chen, Xuefei Wang, Tifeng Jiao, Wei Zhao, Hao Huang, Jie Hu. Construction of LaFeO3/g-C3N4 nanosheet-Graphene heterojunction with built-in electric field for efficient visible-light photocatalytic hydrogen production. Journal of Alloys and Compounds 2021, 59 , 161850. https://doi.org/10.1016/j.jallcom.2021.161850