Journal
APPLIED SURFACE SCIENCE
Volume 614, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2022.156164
Keywords
BiVO4 photoanode; PEC water oxidation; Oxygen vacancy (Ov); Photo-potentiostatic polarization; In doping
Categories
Funding
- National Natural Science Foundation of China [21832005, 22072071, 51972195, 81802709, 21972078, 22072072, 22102087]
- Natural Science Foundation of Shandong Province [ZR2020JQ06, ZR2021QB040]
- National Key Research and Development Program of China [2020YFA0710301]
- Postdoctoral Science Foundation of China [2021M691901]
- Shandong University multidisciplinary research and innovation team of young scholars [2020QNQT11]
Ask authors/readers for more resources
By using In doping and photo-potentiostatic polarization strategies, a highly efficient and stable PEC water splitting device was constructed. The device utilizes oxygen vacancies to enhance conductivity and charge separation, and employs FeOOH co-catalyst to provide abundant active sites.
The water oxidation reaction, as a half-reaction in photoelectrochemistry (PEC) water splitting, has long been hindered due to its slow kinetics. Creating oxygen vacancies (Ov) has attracted considerable attention as an effective method to improve the conductivity and facilitate the surface reaction of photoelectronic materials to improve their PEC performance. Therefore, the preparation of suitable photoanodes with oxygen vacancies becomes a critical part in the development of PEC water splitting. Herein, we designed a novel synthetic strategy involving In doping, photo-potentiostatic polarization and co-catalyst deposition, to induce massive oxygen vacancies in BiVO4 photoanode for efficient PEC water oxidation. The prepared FeOOH/In-BiVO4(L) photoanode exhibits an outstanding photocurrent density of 5.02 mA cm-2 at 1.23 VRHE, which improved 2.7 times compared to those of pristine BiVO4 photoanode (1.84 mA cm-2). By experimental and mechanism exploration, there generated a large number of oxygen vacancies on the BiVO4 photoanode surface after doping and polarization strategies, which is beneficial to increasing the conductivity and charge separation. Besides, FeOOH co-catalyst is deposited to provide more abundant active sites for the water oxidation reaction. This work demonstrates that In doping and photo-potentiostatic polarization strategies can optimize BiVO4 photoanode to construct highly efficient and stable PEC water splitting devices.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available