Charge carrier dynamics of surface back electron/hole recombination in BiVO<sub>4</sub> and TiO<sub>2</sub> photoanodes

Zhu, Wenjun; Yuan, Yuling; Ma, Yimeng

doi:10.1039/d3se01600e

Sustainable Energy Fuels

2024

DOI: 10.1039/d3se01600e

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Charge carrier dynamics of surface back electron/hole recombination in BiVO₄ and TiO₂ photoanodes

Wenjun Zhu,

Yuling Yuan,

Yimeng Ma

Abstract: This work employs photoinduced absorption spectroscopy, transient photocurrent and transient absorption spectroscopy to investigate surface recombination in BiVO4 and TiO2 photoanodes. The kinetic competition between surface recombination and water oxidation...

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Effect of Light and Electrode Polarization on BiVO₄ and TiO₂ Photoanodes for Glycerol Oxidation

Molera,

Sarret,

Fàbrega

et al. 2024

J. Electrochem. Soc.

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In recent years, there has been a growing interest in the photoelectrochemical oxidation of glycerol to produce high-value products. Most studies have focused solely on the photocatalytic properties of the electrodes, overlooking their electrocatalytic properties and the different products obtained under dark conditions. Our work aims to address this gap by comparing the electrocatalytic activity under dark and light conditions to determine whether light influences the reactivity of the electrodes or if it just reduces the overpotential of the reaction. To achieve this, we employed two model semiconductors, TiO2 and BiVO4. We have analyzed their polarization curves under both dark and light conditions and evaluated the competence of glycerol oxidation reaction with the oxygen evolution reaction. Furthermore, we conducted long-term (photo)electrolysis revealing the beneficial role of light on the electrolytic process, as it enables the obtention of C3 products on illuminated TiO2 photoanodes at low electrode polarization, comparable to the performance of BiVO4.

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Effect of Light and Electrode Polarization on BiVO₄ and TiO₂ Photoanodes for Glycerol Oxidation

Molera,

Sarret,

Fàbrega

et al. 2024

J. Electrochem. Soc.

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Charge carrier dynamics of surface back electron/hole recombination in BiVO₄ and TiO₂ photoanodes

Abstract: This work employs photoinduced absorption spectroscopy, transient photocurrent and transient absorption spectroscopy to investigate surface recombination in BiVO4 and TiO2 photoanodes. The kinetic competition between surface recombination and water oxidation...

Cited by 1 publication

References 40 publications

Effect of Light and Electrode Polarization on BiVO₄ and TiO₂ Photoanodes for Glycerol Oxidation

Effect of Light and Electrode Polarization on BiVO₄ and TiO₂ Photoanodes for Glycerol Oxidation

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Charge carrier dynamics of surface back electron/hole recombination in BiVO4 and TiO2 photoanodes

Abstract: This work employs photoinduced absorption spectroscopy, transient photocurrent and transient absorption spectroscopy to investigate surface recombination in BiVO4 and TiO2 photoanodes. The kinetic competition between surface recombination and water oxidation...

Cited by 1 publication

References 40 publications

Effect of Light and Electrode Polarization on BiVO4 and TiO2 Photoanodes for Glycerol Oxidation

Effect of Light and Electrode Polarization on BiVO4 and TiO2 Photoanodes for Glycerol Oxidation

Contact Info

Product

Resources

About

Charge carrier dynamics of surface back electron/hole recombination in BiVO₄ and TiO₂ photoanodes

Effect of Light and Electrode Polarization on BiVO₄ and TiO₂ Photoanodes for Glycerol Oxidation

Effect of Light and Electrode Polarization on BiVO₄ and TiO₂ Photoanodes for Glycerol Oxidation