Impact of synthesis route on the water oxidation kinetics of hematite photoanodes
File(s)
Author(s)
Type
Journal Article
Abstract
Operando spectroelectrochemical analysis is used to determine the water oxidation reaction kinetics for hematite photoanodes prepared using four different synthetic procedures. Whilst these photoanodes exhibit very different current / voltage performance, their underlying water oxidation kinetics are found to be almost invariant. Higher temperature thermal annealing was found to correlate with a shift in the photocurrent onset potential towards less positive potentials, assigned to a suppression of both back electron-hole recombination and of charge accumulation in intraband-gap states, indicating these intraband-gap states do not contribute directly to water oxidation.
Date Issued
2020-09-03
Date Acceptance
2020-08-06
Citation
The Journal of Physical Chemistry Letters, 2020, 11 (17), pp.7285-7290
ISSN
1948-7185
Publisher
American Chemical Society (ACS)
Start Page
7285
End Page
7290
Journal / Book Title
The Journal of Physical Chemistry Letters
Volume
11
Issue
17
Copyright Statement
© 2020 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry Letters, after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpclett.0c02004
Sponsor
Commission of the European Communities
Identifier
https://pubs.acs.org/doi/10.1021/acs.jpclett.0c02004
Grant Number
732840
Subjects
02 Physical Sciences
03 Chemical Sciences
Publication Status
Published
Article Number
acs.jpclett.0c02004
Date Publish Online
2020-08-06