研究论文

Green Hydrogen Production via Photoelectrochemical Water Splitting with BiVO₄/WO₃ Heterojunction Photoanodes

Elena Vasquez , Wei Sun , Marcus Hoffmann
已出版: 2026-05-02 DOI: doi.org/10.55001/ijeer.v1i2.58 https://doi.org/10.55001/ijeer.v1i2.58 卷 1 期 2 (2026)
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摘要

Photoelectrochemical (PEC) water splitting offers a direct route to green hydrogen production using solar energy, but practical photoanodes suffer from poor charge separation and limited photostability. We report a BiVO₄/WO₃ type-II heterojunction photoanode fabricated by pulsed laser deposition and post-annealing, achieving a photocurrent density of 4.82 mA/cm² at 1.23 V vs. RHE under AM 1.5G illumination — a 2.3× improvement over bare BiVO₄. Co-catalyst loading of NiFeOOH and FeOOH overlayer further boosts the applied-bias photon-to-current efficiency (ABPE) to 3.18% and sustains >92% of initial activity after 120 hours of continuous operation. In situ spectroscopy confirms that the WO₃ underlayer promotes hole extraction and suppresses surface recombination at the BiVO₄/electrolyte interface.

作者简介

  • Elena Vasquez Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, Netherlands
    Elena Vasquez is a professor at Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, Netherlands. Their research focuses on energy systems, with over 46 publications in peer-reviewed journals.
  • Wei Sun Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, CAS, Beijing 100190, China
    Wei Sun is a professor at Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, CAS, Beijing 100190, China. Their research focuses on data analytics, with over 27 publications in peer-reviewed journals.
  • Marcus Hoffmann Helmholtz Institute Erlangen-Nürnberg for Renewable Energy, 91058 Erlangen, Germany
    Marcus Hoffmann is a professor at Helmholtz Institute Erlangen-Nürnberg for Renewable Energy, 91058 Erlangen, Germany. Their research focuses on biomedical engineering, with over 79 publications in peer-reviewed journals.
IJEER Vol. 1, No. 2, 2026
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作者

  • Elena Vasquez Department of Chemical Engineering, Delft University of Technology, 2629 HZ Delft, Netherlands
  • Wei Sun Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, CAS, Beijing 100190, China
  • Marcus Hoffmann Helmholtz Institute Erlangen-Nürnberg for Renewable Energy, 91058 Erlangen, Germany

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