Comparing photoelectrochemical water oxidation, recombination kinetics and charge trapping in the three polymorphs of TiO2

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 fi...

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Autores principales:	Benjamin Moss, Kee Kean Lim, Alessandro Beltram, Savio Moniz, Junwang Tang, Paolo Fornasiero, Piers Barnes, James Durrant, Andreas Kafizas
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9709a5ff50cd4303ad6ab34851862521
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spelling	oai:doaj.org-article:9709a5ff50cd4303ad6ab348518625212021-12-02T16:06:58ZComparing photoelectrochemical water oxidation, recombination kinetics and charge trapping in the three polymorphs of TiO210.1038/s41598-017-03065-52045-2322https://doaj.org/article/9709a5ff50cd4303ad6ab348518625212017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03065-5https://doaj.org/toc/2045-2322Abstract 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.Benjamin MossKee Kean LimAlessandro BeltramSavio MonizJunwang TangPaolo FornasieroPiers BarnesJames DurrantAndreas KafizasNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Benjamin Moss Kee Kean Lim Alessandro Beltram Savio Moniz Junwang Tang Paolo Fornasiero Piers Barnes James Durrant Andreas Kafizas Comparing photoelectrochemical water oxidation, recombination kinetics and charge trapping in the three polymorphs of TiO2
description	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.
format	article
author	Benjamin Moss Kee Kean Lim Alessandro Beltram Savio Moniz Junwang Tang Paolo Fornasiero Piers Barnes James Durrant Andreas Kafizas
author_facet	Benjamin Moss Kee Kean Lim Alessandro Beltram Savio Moniz Junwang Tang Paolo Fornasiero Piers Barnes James Durrant Andreas Kafizas
author_sort	Benjamin Moss
title	Comparing photoelectrochemical water oxidation, recombination kinetics and charge trapping in the three polymorphs of TiO2
title_short	Comparing photoelectrochemical water oxidation, recombination kinetics and charge trapping in the three polymorphs of TiO2
title_full	Comparing photoelectrochemical water oxidation, recombination kinetics and charge trapping in the three polymorphs of TiO2
title_fullStr	Comparing photoelectrochemical water oxidation, recombination kinetics and charge trapping in the three polymorphs of TiO2
title_full_unstemmed	Comparing photoelectrochemical water oxidation, recombination kinetics and charge trapping in the three polymorphs of TiO2
title_sort	comparing photoelectrochemical water oxidation, recombination kinetics and charge trapping in the three polymorphs of tio2
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/9709a5ff50cd4303ad6ab34851862521
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Comparing photoelectrochemical water oxidation, recombination kinetics and charge trapping in the three polymorphs of TiO2

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