Optimization of photoelectrochemical water splitting performance on hierarchical TiO 2 nanotube arrays

Handle URI:
http://hdl.handle.net/10754/334626
Title:
Optimization of photoelectrochemical water splitting performance on hierarchical TiO 2 nanotube arrays
Authors:
Zhang, Z.; Wang, Peng ( 0000-0003-0856-0865 )
Abstract:
In this paper, we show that by varying the voltages during two-step anodization the morphology of the hierarchical top-layer/bottom-tube TiO 2 (TiO 2 NTs) can be finely tuned between nanoring/nanotube, nanopore/nanotube, and nanohole-nanocave/nanotube morphologies. This allows us to optimize the photoelectrochemical (PEC) water splitting performance on the hierarchical TiO 2 NTs. The optimized photocurrent density and photoconversion efficiency in this study, occurring on the nanopore/nanotube TiO 2 NTs, were 1.59 mA cm -2 at 1.23 V vs. RHE and 0.84% respectively, which are the highest values ever reported on pristine TiO 2 materials under illumination of AM 1.5G. Our findings contribute to further improvement of the energy conversion efficiency of TiO 2-based devices.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Water Desalination and Reuse Research Center (WDRC)
Citation:
Zhang Z, Wang P (2012) Optimization of photoelectrochemical water splitting performance on hierarchical TiO2 nanotube arrays. Energy & Environmental Science 5: 6506. doi:10.1039/c2ee03461a.
Publisher:
Royal Society of Chemistry (RSC)
Journal:
Energy & Environmental Science
Issue Date:
10-Feb-2012
DOI:
10.1039/c2ee03461a
Type:
Article
ISSN:
17545692
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Z.en
dc.contributor.authorWang, Pengen
dc.date.accessioned2014-11-11T14:32:36Z-
dc.date.available2014-11-11T14:32:36Z-
dc.date.issued2012-02-10en
dc.identifier.citationZhang Z, Wang P (2012) Optimization of photoelectrochemical water splitting performance on hierarchical TiO2 nanotube arrays. Energy & Environmental Science 5: 6506. doi:10.1039/c2ee03461a.en
dc.identifier.issn17545692en
dc.identifier.doi10.1039/c2ee03461aen
dc.identifier.urihttp://hdl.handle.net/10754/334626en
dc.description.abstractIn this paper, we show that by varying the voltages during two-step anodization the morphology of the hierarchical top-layer/bottom-tube TiO 2 (TiO 2 NTs) can be finely tuned between nanoring/nanotube, nanopore/nanotube, and nanohole-nanocave/nanotube morphologies. This allows us to optimize the photoelectrochemical (PEC) water splitting performance on the hierarchical TiO 2 NTs. The optimized photocurrent density and photoconversion efficiency in this study, occurring on the nanopore/nanotube TiO 2 NTs, were 1.59 mA cm -2 at 1.23 V vs. RHE and 0.84% respectively, which are the highest values ever reported on pristine TiO 2 materials under illumination of AM 1.5G. Our findings contribute to further improvement of the energy conversion efficiency of TiO 2-based devices.en
dc.language.isoenen
dc.publisherRoyal Society of Chemistry (RSC)en
dc.rightsThis article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.en
dc.rightsArchived with thanks to Energy and Environmental Scienceen
dc.rights.urihttp://creativecommons.org/licenses/by-nc/3.0/en
dc.subjectAnodizationsen
dc.subjectNanotube arraysen
dc.subjectPhotoconversion efficiencyen
dc.subjectPhotocurrent densityen
dc.subjectPhotoelectrochemicalsen
dc.subjectTiOen
dc.subjectWater splittingen
dc.subjectConversion efficiencyen
dc.subjectElectrochemistryen
dc.subjectMorphologyen
dc.subjectNanotubesen
dc.subjectOptimizationen
dc.subjectTitanium dioxideen
dc.subjectelectrochemical methoden
dc.subjectoptimizationen
dc.subjectperformance assessmenten
dc.subjectphotovoltaic systemen
dc.subjectpristine environmenten
dc.titleOptimization of photoelectrochemical water splitting performance on hierarchical TiO 2 nanotube arraysen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalEnergy & Environmental Scienceen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorZhang, Zhonghaien
kaust.authorWang, Pengen
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