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2D bismuthene as a functional interlayer between BiVO4 and NiFeOOH for enhanced oxygen-evolution photoanodes

Title: 2D bismuthene as a functional interlayer between BiVO4 and NiFeOOH for enhanced oxygen-evolution photoanodes
Authors: Cui, J
Daboczi, M
Regue, M
Chin, Y
Pagano, K
Zhang, J
Isaacs, MA
Kerherve, G
Mornto, A
West, J
Gimenez, S
Kim, J
Eslava, S
Item Type: Journal Article
Abstract: BiVO4 has attracted wide attention for oxygen-evolution photoanodes in water-splitting photoelectrochemical devices. However, its performance is hampered by electron-hole recombination at surface states. Herein, partially oxidized two-dimensional (2D) bismuthene is developed as an effective, stable, functional interlayer between BiVO4 and the archetypal NiFeOOH co-catalyst. Comprehensive (photo)electrochemical and surface photovoltage characterizations show that NiFeOOH can effectively increase the lifetime of photogenerated holes by passivating hole trap states of BiVO4; however, it is limited in influencing electron trap states related to oxygen vacancies (VO). Loading bismuthene on BiVO4 photoanodes increases the density of VO that are beneficial for the oxygen evolution reaction via the formation of oxy/hydroxyl-based water oxidation intermediates at the surface. Moreover, bismuthene increases interfacial band bending and fills the VO-related electron traps, leading to more efficient charge extraction. With the synergistic interaction of bismuthene and NiFeOOH on BiVO4, this composite photoanode achieves a 5.8-fold increase in photocurrent compared to bare BiVO4 reaching a stable 3.4 (±0.2) mA cm–2 at a low bias of +0.8 VRHE or 4.7(±0.2) mA cm–2 at +1.23 VRHE. The use of 2D bismuthene as functional interlayer provides a new strategy to enhance the performance of photoanodes.
Issue Date: 26-Oct-2022
Date of Acceptance: 1-Sep-2022
URI: http://hdl.handle.net/10044/1/99622
DOI: 10.1002/adfm.202207136
ISSN: 1616-301X
Publisher: Wiley
Start Page: 1
End Page: 12
Journal / Book Title: Advanced Functional Materials
Volume: 32
Issue: 44
Copyright Statement: © 2022 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
2D bismuthene
BiVO
(4) photoanodes
co-catalysts
oxygen vacancies
surface states
WATER OXIDATION
HOLE TRANSFER
STABILITY
EFFICIENCY
PHOTOSTABILITY
NANOSTRUCTURES
TEMPERATURE
VACANCIES
SINGLE
TIO2
Materials
02 Physical Sciences
03 Chemical Sciences
09 Engineering
Publication Status: Published online
Online Publication Date: 2022-09-04
Appears in Collections:Materials
Physics
Experimental Solid State
Chemical Engineering
Faculty of Natural Sciences
Faculty of Engineering



This item is licensed under a Creative Commons License Creative Commons