On enhancing the performance of BIVO4 Photoanodes

  1. Miguel García-Tecedor
  2. Mariam Barawi
  3. Alejandro García-Eguizábal 1
  4. Miguel Gómez-Mendoza
  5. Freddy E. Oropeza
  6. Ignacio J. Villar-García 2
  7. Camilo A. Mesa 3
  8. Sixto Giménez 4
  9. James R. Durrant
  10. Marta Liras
  11. Víctor A. de la Peña O'Shea
  1. 1 Universidad de La Rioja
    info
    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

    Geographic location of the organization Universidad de La Rioja
  2. 2 Universidad CEU San Pablo
    info
    Universidad CEU San Pablo

    Madrid, España

    ROR https://ror.org/00tvate34

    Geographic location of the organization Universidad CEU San Pablo
  3. 3 Barcelona Institute of Science and Technology
    info
    Barcelona Institute of Science and Technology

    Barcelona, España

    Geographic location of the organization Barcelona Institute of Science and Technology
  4. 4 Universitat Jaume I
    info
    Universitat Jaume I

    Castelló de la Plana, España

    ROR https://ror.org/02ws1xc11

    Geographic location of the organization Universitat Jaume I
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Proceedings:
XL Reunión Bienal de la Real Sociedad Española de Química (RSEQ)

ISBN: 978-84-09-73753-6

Year of publication: 2025

Pages: 169

Congress: Reunión Bienal de la Real Sociedad Española de Química (RSEQ) = XL Biennial Meeting of the Royal Spanish Society of Chemistry. 30 junio-3 julio. ( 40º. 2025. Bilbao)

Type: Conference paper

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Abstract

BiVO4 has emerged as one of the most promising materials to fabricate efficient photoanodes forphotoelectrochemical (PEC) solar water splitting. BiVO4 is an n-type semiconductor, with a 2.4 eV bandgap anda theoretical solar to hydrogen (STH) efficiency of 9.2% with a maximum photocurrent of 7.5 mA cm2 under AM1.5 G illumination, low overpotential andfavourable band-edge positions towards the Oxygen Evolution Reaction(OER).However, BiVO4 also presents poorelectron transport, high surface recombination and slow water oxidationkinetics. Hence, enormous efforts have been madein the past few years to mitigate these drawbacks throughdifferent approaches such as nanostructuring, doping, heterostructuring, the employment of post-synthetictreatments and the use of efficient co-catalysts.The present study proposes different strategies for boosting the water oxidation performance of BiVO4photoanodes: i) a laser treatment, ii) a transition metal doping (Ni, Fe and Co) and iii) the employment of cocatalysts.The origin of this enhanced performance towards Oxygen Evolution Reaction (OER) through theseefficient routes was studied by a combination of a suite of structural, chemical, and mechanistic advancedcharacterization techniques including Electrochemical Impedance Spectroscopy and Transient AbsorptionSpectroscopy, among others.