Direct Observation of the Chemical Transformations in BiVO4 Photoanodes upon Prolonged Light‐Aging Treatments
Source abstract
Abstract
Exposing BiVO4 photoanodes to light‐aging treatments is known to produce a significant photocurrent enhancement. Until now, the interpretation given to this phenomenon is associated to the formation of oxygen vacancies and little is reported about chemical changes in the material. Herein, the chemical segregation of Bi species toward the surface upon light‐aging treatment is demonstrated, which takes place with the concomitant formation of intra‐bandgap states associated to the oxygen vacancies. It is further demonstrated that these intra‐bandgap states are photoactive and generate photocurrent under infrared excitation. These results highlight the importance of understanding light‐induced effects while employing multinary metal oxide photoelectrodes.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Electronic and Structural Properties of Oxides · Gas Sensing Nanomaterials and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Advanced Materials (INAM) Universitat Jaume I 12006 Castelló Spain
Material Research and Technology (MRT) Department Luxembourg Institute of Science and Technology (LIST) 4422 Belvaux Luxembourg
Catalan Institute of Nanoscience and Nanotechnology (ICN2) CSIC and BIST 08193 Barcelona Catalonia Spain
Unidad de Procesos Fotoactivados Instituto IMDEA Energía 28935 Móstoles Madrid Spain
Advanced Electron Nanoscopy (GAeN) ICREA 08010 Barcelona Catalonia Spain
Funding
Universitat Jaume I · Horizon 2020 Framework Programme
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