articleEnergy & Environmental SustainabilityMay 15, 2025HYBRID OA

Differentiating the role of Ni and Fe in NiFeOx co-catalyzed BiVO4 photoanode for water oxidation

MGMichael GunawanMPMatthew PriestDGDenny GunawanSNShuai NieASAdhi Satriyatama

UNSW Sydney · Australian Synchrotron · +2 more institutions

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Abstract

Photoelectrochemical (PEC) water splitting is a promising technology for green hydrogen production. However, severe charge recombination at the photoanode has impeded its advancement. Incorporating co-catalyst on bismuth vanadate (BiVO 4 , BVO) photoanode could enhance the charge transfer efficiency and accelerate the surface reaction kinetics, which are two key challenges in the PEC system. Herein, NiFeO x co-catalyst is deposited on BVO (NiFeO x -BVO), enhancing the performance to 3.3 times (3.57 ​mA ​cm −2 at 1.23 ​V vs. RHE) in comparison to the pristine BVO. A systematic analysis has been engaged to unravel the individual roles of Ni and Fe in enhancing the PEC performance of NiFeO x -BVO. While the Ni…

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Keywords
  • Catalysis
  • Chemical engineering
  • Materials science
  • Business
  • Nanotechnology
  • Chemistry
  • Organic chemistry
  • Engineering
UN Sustainable Development Goals
  • Clean water and sanitation
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