New Versatile Synthetic Route for the Preparation of Metal Phosphate Decorated Hydrogen Evolution Photocatalysts

  • Lu Chen
    Lu Chen
    State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
    More by Lu Chen
  • Yi Zhao
    Yi Zhao
    State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
    More by Yi Zhao
  • Jingyao Yang
    Jingyao Yang
    State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
    More by Jingyao Yang
  • Dan Liu
    Dan Liu
    State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
    More by Dan Liu
  • Xiaofeng Wei
    Xiaofeng Wei
    National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Gongye Road 523, Fuzhou, Fujian 350002, China
    More by Xiaofeng Wei
  • Xuxu Wang
    Xuxu Wang
    State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
    More by Xuxu Wang
  • , and 
  • Yuanhui Zheng*
    Yuanhui Zheng
    State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
    *(Yu.Z.) E-mail: [email protected]
Cite this: Inorg. Chem. 2020, 59, 2, 1566–1575
Publication Date (Web):January 8, 2020
https://doi.org/10.1021/acs.inorgchem.9b03475
Copyright © 2020 American Chemical Society
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Abstract

Photocatalytic hydrogen generation will benefit from the realization of more active but less expensive cocatalysts compared with noble metal counterparts. Herein we developed a universal vapor deposition method that selectively uses the thermal decomposition products of sodium hypophosphite as a phosphorus source for the fabrication of inexpensive and highly efficient metal phosphate (MPi) modified CdS nanorods. We find that the modification with a bimetal phosphate (i.e., 5 wt % NiCoPi) leads to an activity enhancement by a factor of approximately 52 in boosting visible-light-driven hydrogen evolution relative to the pristine CdS nanorods. The photocatalyst exhibits a high hydrogen generation rate of 13.44 mmol·g–1·h–1, which is much higher than that of its single metal counterparts (NiPi, 8.70 mmol·g–1·h–1; CoPi, 5.79 mmol·g–1·h–1) and 1 wt % Pt modified CdS (1.33 mmol·g–1·h–1). Its apparent quantum efficiency reaches 23.5% at 420 nm. Furthermore, it also shows remarkable photostability for eight consecutive cycles of photocatalytic activity tests with total reaction time of 24 h. The excellent photocatalytic performance of the photocatalyst is believed to be associated with the in situ formed NiICoP and NiCoIIIPi cocatalysts, which not only play an important role in photogenerated charge separation but also provide highly active catalytic reaction sites for the corresponding hydrogen evolution reaction and the sacrificial agent oxidation reaction.

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The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.inorgchem.9b03475.

  • Typical TEM images of the as-prepared NiCoPi sample, FTIR spectra of CdS and 5 wt % NiCoPi/CdS samples, typical low-magnification TEM image of the as-prepared 5 wt % NiCoPi/CdS sample, N2 adsorption–desorption isotherms of pure CdS and 5 wt % NiCoPi/CdS sample, energy dispersive X-ray (EDX) spectra of 5 wt % NiCoPi/CdS sample from three different spots, dark-field TEM image, XPS survey spectra of the as-prepared pure CdS and 5 wt % NiCoPi/CdS sample, high resolution XPS spectra of (a) Ni 2p, (b) Co 2p, and (c) P 2p of 5 wt % NiCoPi/CdS sample, digital photographs of the as-prepared NiCoPi/CdS samples with different NiCoPi loading concentrations; time-resolved transient PL of pure CdS and 5 wt % NiCoPi/CdS sample, photocurrent, and photocatalytic activity (PDF)

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Cited By


This article is cited by 3 publications.

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  2. Ping Li, Jiangna Guo, Xing Ji, Yuli Xiong, Qingxin Lai, Shuangrui Yao, Yan Zhu, Yunhuai Zhang, Peng Xiao. Construction of direct Z-scheme photocatalyst by the interfacial interaction of WO3 and SiC to enhance the redox activity of electrons and holes. Chemosphere 2021, 282 , 130866. https://doi.org/10.1016/j.chemosphere.2021.130866
  3. Daochuan Jiang, Lei Zhang, Qiudi Yue, Taotao Wang, Qiang Huang, Pingwu Du. Efficient suppression of surface charge recombination by CoP-Modified nanoporous BiVO4 for photoelectrochemical water splitting. International Journal of Hydrogen Energy 2021, 46 (29) , 15517-15525. https://doi.org/10.1016/j.ijhydene.2021.02.094