Operando Infrared Spectroscopy Reveals the Dynamic Nature of Semiconductor–Electrolyte Interface in Multinary Metal Oxide Photoelectrodes
Anirudh Venugopal, Recep Kaş, Kayeu Hau, Wilson A. Smith
Abstract
/water interface, upon illumination in open-circuit conditions, while both bismuth and vanadium dissolution occurs when an anodic potential is applied under illumination. This dynamic dissolution alters the surface Bi:V ratio over time, which subsequently alters the band bending in the space charge region. This further impacts the overall PEC performance of the photoelectrode, at a time scale very relevant for most lab-scale studies, and therefore has serious implications on the performance analysis and fundamental studies performed on this and other similar photoelectrodes.
Topics & Concepts
ElectrolytePhotoelectrochemistryChemistryBismuthOxideSemiconductorDissolutionVanadium oxideFourier transform infrared spectroscopyInfraredPhotoelectrochemical cellVanadiumChemical engineeringAnalytical Chemistry (journal)OptoelectronicsInorganic chemistryElectrochemistryMaterials scienceElectrodeOpticsPhysical chemistryEngineeringOrganic chemistryPhysicsChromatographyAdvanced Photocatalysis TechniquesElectronic and Structural Properties of OxidesCopper-based nanomaterials and applications