UM
An investigation on the role of W doping in BiVO 4 photoanodes used for solar water splitting
Zhao X.1; Hu J.1; Chen S.1; Chen Z.1
2018
Source PublicationPhysical Chemistry Chemical Physics
ISSN14639076
Volume20Issue:19Pages:13637-13645
Abstractn-Type doping has been widely employed to enhance the performance of a photoanode in a photoelectrochemical cell used for water splitting. However, little is known about how doping affects the catalytic activity during surface catalysis. Herein, we took BiVO as an example to investigate the effect of doping on surface catalysis from both experimental and theoretical perspectives. To enable an impartial comparison, we have prepared planar BiVO thin films with and without W doping. It was found that W doping had no obvious effect on the morphology, crystallinity, and light absorption of the film; however, the photocurrent was significantly enhanced upon W doping. This enhancement is contributed by two important factors: better charge separation efficiency and improved surface charge transfer efficiency. Electrochemical analysis reveals that W doping lowers the surface charge transfer resistance and forms active surface states, facilitating charge transfer. Theoretical analysis shows that W doping activates the V atoms to be reactive sites. Moreover, the adsorption energies and distance between adsorption species (OH , O , and OOH ) involved in the water splitting process become more favorable for surface charge transfer. The current study provides an insight into the roles of W doping in BiVO , especially during surface catalysis.
DOI10.1039/c8cp01316k
URLView the original
Language英語English
Fulltext Access
Citation statistics
Cited Times [WOS]:18   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Nanyang Technological University
2.Northwest University China
Recommended Citation
GB/T 7714
Zhao X.,Hu J.,Chen S.,et al. An investigation on the role of W doping in BiVO 4 photoanodes used for solar water splitting[J]. Physical Chemistry Chemical Physics,2018,20(19):13637-13645.
APA Zhao X.,Hu J.,Chen S.,&Chen Z..(2018).An investigation on the role of W doping in BiVO 4 photoanodes used for solar water splitting.Physical Chemistry Chemical Physics,20(19),13637-13645.
MLA Zhao X.,et al."An investigation on the role of W doping in BiVO 4 photoanodes used for solar water splitting".Physical Chemistry Chemical Physics 20.19(2018):13637-13645.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhao X.]'s Articles
[Hu J.]'s Articles
[Chen S.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhao X.]'s Articles
[Hu J.]'s Articles
[Chen S.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhao X.]'s Articles
[Hu J.]'s Articles
[Chen S.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.