Boosting the Photoelectrochemical Water Oxidation Performance of TiO2 Nanotubes by Surface Modification Using Silver Phosphate

Photoelectrocatalytic approaches are fascinating options for long-lasting energy storage through the transformation of solar energy into electrical energy or hydrogen fuel. Herein, we report a facile method of fabricating a composite electrode of well-aligned TiO2 nanotubes (TNTs) decorated with pho...

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Bibliographic Details
Published in:Catalysts 2022-11, Vol.12 (11), p.1440
Main Authors: Arunachalam, Prabhakarn, Amer, Mabrook S., AlOraij, Haneen A., Al-Mayouf, Abdullah M., Hezam, Mahmoud, Al-Shalwi, Matar
Format: Article
Language:English
Subjects:
Arrays
Catalysts
Charge transfer
Chemical reactions
Current efficiency
Efficiency
Electric contacts
Electrodes
Electromagnetic absorption
Energy storage
Hydrogen fuels
Hydrogen-based energy
Light
Microscopy
Morphology
Nanoparticles
Nanotubes
Optical properties
Oxidation
Phosphates
Photoelectric effect
photoelectrochemistry
Physiochemistry
Silver
Silver compounds
silver phosphate
Solar energy
Spectrum analysis
TiO2 nanotubes
Titanium dioxide
water oxidation
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Summary:Photoelectrocatalytic approaches are fascinating options for long-lasting energy storage through the transformation of solar energy into electrical energy or hydrogen fuel. Herein, we report a facile method of fabricating a composite electrode of well-aligned TiO2 nanotubes (TNTs) decorated with photodeposited silver phosphate (Ag3PO4) nanoparticles. Assessment of the optical, physiochemical and photoelectrochemical features demonstrated that the fabricated TNTs/Ag3PO4 films showed a substantially boosted photocurrent response of 0.74 mA/cm2, almost a 3-fold enrichment in comparison with the pure TNTs. Specifically, the applied bias photon-to-current efficiency of the fabricated TNTs/Ag3PO4 composite electrode was 2.4-fold superior to that of the pure TNTs electrode. In these TNTs/Ag3PO4 photoanodes, the introduction of Ag3PO4 over TNTs enhanced light absorption and improved charge transfer and surface conductivity. The developed process can be generally applied to designing and developing efficient contact interfaces between photoanodes and numerous cocatalysts.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal12111440