Moss, B;
Lim, KK;
Beltram, A;
Moniz, S;
Tang, J;
Fornasiero, P;
Barnes, P;
... Kafizas, A; + view all
(2017)
Comparing photoelectrochemical water oxidation, recombination kinetics and charge trapping in the three polymorphs of TiO2.
Scientific Reports
, 7
, Article 293. 10.1038/s41598-017-03065-5.
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Abstract
In this article we present the first comparative study of the transient decay dynamics of photo-generated charges for the three polymorphs of TiO2. To our knowledge, this is the first such study of the brookite phase of TiO2 over timescales relevant to the kinetics of water splitting. We find that the behavior of brookite, both in the dynamics of relaxation of photo-generated charges and in energetic distribution, is similar to the anatase phase of TiO2. Moreover, links between the rate of recombination of charge carriers, their energetic distribution and the mode of transport are made in light of our findings and used to account for the differences in water splitting efficiency observed across the three polymorphs.
| Type: | Article |
|---|---|
| Title: | Comparing photoelectrochemical water oxidation, recombination kinetics and charge trapping in the three polymorphs of TiO2 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41598-017-03065-5 |
| Publisher version: | http://dx.doi.org/10.1038/s41598-017-03065-5 |
| Language: | English |
| Additional information: | Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
| Keywords: | Science & Technology, Multidisciplinary Sciences, Science & Technology - Other Topics, PHOTOCATALYTIC ACTIVITY, ANATASE, RUTILE, BROOKITE, ELECTRODES, ZNO |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1561358 |
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