212.
WO
3 is a potential material candidate for construction of photoanode for solar driven water splitting. In this work, μm-thick porous WO
3 photoanode is prepared by depositing a stable ink made of WO
3 nanoparticles and Aristoflex velvet polymer in water using the doctor blade technique, followed by a sintering in air. The nature of WO
3 nanoparticles, its loading mass on F-doped tin oxide electrode as well as sintering temperature are examined in order to optimize the photocatalytic activity of the resultant WO
3 photoanode. The operation of WO
3 photoanode is investigated by varying the light illumination direction and light incident intensity as well as changing the nature of the electrolyte. Dissolved tungsten in electrolyte is quantified by ICP-MS providing insights into the influences of electrolyte nature and operating conditions to the corrosion of WO
3. It is proposed that the H
2O
2 and OH
. radical generated as by-products of the photo-driven water oxidation on the photoanode surface are harmful species that accelerate the dissolution of WO
3.
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