AI Article Synopsis
- The orientation of crystal facets in WO photoanodes significantly affects their photoelectrochemical (PEC) performance for water splitting.
- Using a mono-particle-layer technique with WO plates aligned along the (002) facet enhances water oxidation efficiency and stability.
- Additionally, photo-depositing Au on crack edges of {110} facets boosts electron collection, leading to better charge separation and transfer compared to non-faceted electrodes.
Article Abstract
Photoelectrochemical (PEC) performance of WO photoanodes for water splitting is heavily influenced by the orientation of crystal facets. In this work, mono-particle-layer electrodes, assembled by particulate WO 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 WO 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 WO photoelectrode, which is also applicable to other regularly shaped semiconductor photocatalysts with anisotropic charge migration.
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| http://dx.doi.org/10.1002/chem.202201169 | DOI Listing |
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