Facet Engineering on WO3 Mono-Particle-Layer Electrode for Photoelectrochemical Water Splitting.
Chemistry
; 28(51): e202201169, 2022 Sep 12.
Article
em En
| MEDLINE
| ID: mdl-35688798
ABSTRACT
Photoelectrochemical (PEC) performance of WO3 photoanodes for water splitting is heavily influenced by the orientation of crystal facets. In this work, mono-particle-layer electrodes, assembled by particulate WO3 square plates with highly uniform alignment along the (002) facet, improved PEC water oxidation kinetics and stability. Photo-deposition of Au along the cracks formed on the surface of the plates, which are the edges of {110} facets, was found to further enhance electron collection efficiency. Combination of these two strategies allowed the facet-engineered WO3 electrode to produce significantly higher efficiencies in charge separation and transfer than the electrode prepared without facet orientation. This work has provided a facile route for fabricating a structurally designed WO3 photoelectrode, which is also applicable to other regularly shaped semiconductor photocatalysts with anisotropic charge migration.
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01-internacional
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MEDLINE
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En
Ano de publicação:
2022
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Article