Achieving long-term stable BiVO4 photoanodes for solar water splitting via carbon-layer protecting combined with active centers dynamic repairing
Loading...
Author (Corporation)
Publication date
01/2024
Typ of student thesis
Course of study
Collections
Type
01A - Journal article
Editors
Editor (Corporation)
Supervisor
Parent work
Chemical Engineering Journal
Special issue
DOI of the original publication
Link
Series
Series number
Volume
479
Issue / Number
Pages / Duration
147713
Patent number
Publisher / Publishing institution
Elsevier
Place of publication / Event location
Edition
Version
Programming language
Assignee
Practice partner / Client
Abstract
Although great interest is focused on highly active photoanodes for efficient photoelectrochemical (PEC) water splitting, the issue on improving stability during oxygen evolution reaction (OER) is seldom discussed by far. Herein, a simple chemical way to construct carbon functional interlayer between bismuth vanadate (BiVO4) and NiFe layered double hydroxide (NiFe-LDH) co-catalyst, combined with hydroxylation, can significantly improve the activity and stability. The enhanced electronic conductivity by carbon layer and formed strong polarization electronic field via surface hydroxylation, promote the interfacial charge transfer and bulk charge separation. More importantly, the carbon layer combined with more efficient redeposition of Fe active centers in NiFe-LDH catalysts caused by enhanced adsorption of Fe(III) onto Ni sites via hydroxylation, can greatly improve the OH-BiVO4@C@NiFe-LDH photoanode stability. With the synergistic effects of carbon functional interlayer and self-healing mechanism, OH-BiVO4@C@NiFe-LDH photoanode achieves extremely high photocurrent density (5.31 mA cm−2 at 1.23 versus the RHE), even maintaining more than 87.5 % of the initial photocurrent density within 20 h irradiation in KBi electrolyte with Fe(III) ions. This work provides a new strategy to enhance the performance of BiVO4–based photoanodes, especially for achieving long-term stability during OER.
Keywords
Subject (DDC)
Event
Exhibition start date
Exhibition end date
Conference start date
Conference end date
Date of the last check
ISBN
ISSN
1385-8947
1873-3212
1873-3212
Language
English
Created during FHNW affiliation
Yes
Strategic action fields FHNW
Publication status
Published
Review
Peer review of the complete publication
Open access category
Closed
License
Citation
Bai, W., Li, H., Hu, Y., Wang, J., Li, A., & Corvini, P. (2024). Achieving long-term stable BiVO4 photoanodes for solar water splitting via carbon-layer protecting combined with active centers dynamic repairing. Chemical Engineering Journal, 479, 147713. https://doi.org/10.1016/j.cej.2023.147713