Back to Search
Start Over
Awakening the Photoelectrochemical Activity of α‐SnWO 4 Photoanodes with Extraordinary Crystallinity Induced by Reductive Annealing
- Source :
- Advanced Energy & Sustainability Research, Vol 3, Iss 1, Pp n/a-n/a (2022)
- Publication Year :
- 2022
- Publisher :
- Wiley, 2022.
-
Abstract
- Oxide‐based photoelectrodes for solar water splitting have gained growing attention because of their decent stability and cost‐effectiveness. Particularly, α‐SnWO4 has been regarded as a potential next‐generation light absorbing material due to the predicted favorable bandgap of 1.9 eV. Herein, the investigation and amelioration of the crystallinity as a performance dominating factor to the α‐SnWO4‐based photoanode are demonstrated. The improvement is attributed to a unique crystallization process induced by the formation of oxygen vacancies in the reductive atmosphere at 500 °C. The sample exhibits notably enhanced visible‐light absorption and an improved charge transport property. Electrochemical measurements reveal a cathodic shift of the flat‐band potential, corresponding to the impacted band position. The photocurrent is enhanced from 0.03 to 0.42 mA cm−2 (AM1.5, 1.23 VRHE). Such a new treatment can be used as an effective tool for developing α‐SnWO4 into efficient photoelectrocatalytic (PEC) materials.
Details
- ISSN :
- 26999412
- Volume :
- 3
- Database :
- OpenAIRE
- Journal :
- Advanced Energy and Sustainability Research
- Accession number :
- edsair.doi.dedup.....c4f505e487a72cf122b186bc8715fc9e