Publications
Detailed Information
Selective and Efficient Gd-Doped BiVO4 Photoanode for Two-Electron Water Oxidation to H2O2
Cited 147 time in
Web of Science
Cited 158 time in Scopus
- Authors
- Issue Date
- 2019-03
- Publisher
- American Chemical Society
- Citation
- ACS Energy Letters, Vol.4 No.3, pp.720-728
- Abstract
- Photoelectrochemical oxidation of water presents a pathway for sustainable production of hydrogen peroxide (H2O2). Two-electron water oxidation toward H2O2, however, competes with the popular four-electron process to form oxygen and one-electron water oxidation to form OH radical. To date, bismuth vanadate (BiVO4) has been shown to exhibit promising selectivity toward H2O2, especially under illumination, but it suffers from high overpotential and notoriously poor stability. Herein, using density functional theory calculations, we predict that doping BiVO4 with optimal concentrations of gadolinium (Gd) not only enhances its activity for H2O2 production but also improves its stability. Experimentally, we demonstrate that intermediate amounts of Gd doping (6-12%) reduce the onset potential of BiVO4 for H2O2 production by similar to 110 mV while achieving a Faradaic efficiency of similar to 99.5% under illumination and prolonging the catalytic lifetime by more than a factor of 20 at 2.0 V vs RHE under illumination.
- ISSN
- 2380-8195
- Files in This Item:
- There are no files associated with this item.
Item View & Download Count
Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.