Boosting Oxygen Evolution Reaction Performance on BiVO 4 Photoanode via Gradient Oxygen Vacancies
Wuhan National Laboratory for Optoelectronics · Huazhong University of Science and Technology
Abstract
BiVO4 is extensively studied in photoelectrochemical water splitting systems. Its relatively large bandgap and low charge carrier mobility severely limit the solar-driven oxygen evolution reaction on BiVO4. A gradient distribution of oxygen vacancies can modulate the structural and electrical properties of BiVO4. However, the formation of oxygen vacancies remains a daunting challenge. Here, we propose a simple hydrothermal post-treatment method to deposit a thin amorphous BiOx layer (∼8 nm) with gradient oxygen vacancies on the surface of BiVO4 and enable directional hole migration. The resultant BiVO4/BiOx/NiFeOx photoanode achieves a high photocurrent density of 6.34 mA cm–2 at 1.23 V (vs RHE) in 1.0 M…
Citation impact
- FWCI
- 13.79
- Percentile
- 100%
- References
- 57
Authors
6- NLNan Li
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology
- YWYan Wei
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology
- SLShujie Liu
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology
- ZYZhaoshi Yu
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology
- YSYan ShenCorresponding
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology
Topics & keywords
- Oxygen
- Boosting (machine learning)
- Oxygen evolution
- Materials science
- Chemical engineering
- Nanotechnology
- Optoelectronics
- Chemical physics
- Affordable and clean energy