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Vapor Phase Processing of α-Fe2O3Photoelectrodes for Water Splitting: An Insight into the Structure/Property Interplay

Michael Warwick Orcid Logo, Kimmo Kaunisto, Davide Barreca, Giorgio Carraro, Alberto Gasparotto, Chiara Maccato, Elza Bontempi, Cinzia Sada, Tero-Petri Ruoko, Stuart Turner, Gustaaf Van Tendeloo

ACS Applied Materials & Interfaces, Volume: 7, Issue: 16, Pages: 8667 - 8676

Swansea University Author: Michael Warwick Orcid Logo

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DOI (Published version): 10.1021/acsami.5b00919

Abstract

Harvesting radiant energy to trigger water photoelectrolysis and produce clean hydrogen is receiving increasing attention in the search of alternative energy resources. In this regard, hematite (α-Fe2O3) nanostructures with controlled nano-organization have been fabricated and investigated for use a...

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Published in: ACS Applied Materials & Interfaces
ISSN: 1944-8244 1944-8252
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa32767
first_indexed 2017-03-29T13:47:18Z
last_indexed 2018-02-09T05:21:03Z
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spelling 2017-04-03T13:25:14.2038804 v2 32767 2017-03-29 Vapor Phase Processing of α-Fe2O3Photoelectrodes for Water Splitting: An Insight into the Structure/Property Interplay 9fdabb7283ffccc5898cc543305475cf 0000-0002-9028-1250 Michael Warwick Michael Warwick true false 2017-03-29 Harvesting radiant energy to trigger water photoelectrolysis and produce clean hydrogen is receiving increasing attention in the search of alternative energy resources. In this regard, hematite (α-Fe2O3) nanostructures with controlled nano-organization have been fabricated and investigated for use as anodes in photoelectrochemical (PEC) cells. The target systems have been grown on conductive substrates by plasma enhanced-chemical vapor deposition (PE-CVD) and subjected to eventual ex situ annealing in air to further tailor their structure and properties. A detailed multitechnique approach has enabled to elucidate the interrelations between system characteristics and the generated photocurrent. The present α-Fe2O3 systems are characterized by a high purity and hierarchical morphologies consisting of nanopyramids/organized dendrites, offering a high contact area with the electrolyte. PEC data reveal a dramatic response enhancement upon thermal treatment, related to a more efficient electron transfer. The reasons underlying such a phenomenon are elucidated and discussed by transient absorption spectroscopy (TAS) studies of photogenerated charge carrier kinetics, investigated on different time scales for the first time on PE-CVD Fe2O3 nanostructures. Journal Article ACS Applied Materials &amp; Interfaces 7 16 8667 8676 1944-8244 1944-8252 hematite; hierarchical structures; PE-CVD; PEC; transient absorption spectroscopy; water splitting 31 12 2015 2015-12-31 10.1021/acsami.5b00919 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&amp;SrcAuth=ORCID&amp;SrcApp=OrcidOrg&amp;DestLinkType=FullRecord&amp;DestApp=WOS_CPL&amp;KeyUT=WOS:000353931300037&amp;KeyUID=WOS:000353931300037 COLLEGE NANME COLLEGE CODE Swansea University 2017-04-03T13:25:14.2038804 2017-03-29T09:52:58.2331315 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Michael Warwick 0000-0002-9028-1250 1 Kimmo Kaunisto 2 Davide Barreca 3 Giorgio Carraro 4 Alberto Gasparotto 5 Chiara Maccato 6 Elza Bontempi 7 Cinzia Sada 8 Tero-Petri Ruoko 9 Stuart Turner 10 Gustaaf Van Tendeloo 11
title Vapor Phase Processing of α-Fe2O3Photoelectrodes for Water Splitting: An Insight into the Structure/Property Interplay
spellingShingle Vapor Phase Processing of α-Fe2O3Photoelectrodes for Water Splitting: An Insight into the Structure/Property Interplay
Michael Warwick
title_short Vapor Phase Processing of α-Fe2O3Photoelectrodes for Water Splitting: An Insight into the Structure/Property Interplay
title_full Vapor Phase Processing of α-Fe2O3Photoelectrodes for Water Splitting: An Insight into the Structure/Property Interplay
title_fullStr Vapor Phase Processing of α-Fe2O3Photoelectrodes for Water Splitting: An Insight into the Structure/Property Interplay
title_full_unstemmed Vapor Phase Processing of α-Fe2O3Photoelectrodes for Water Splitting: An Insight into the Structure/Property Interplay
title_sort Vapor Phase Processing of α-Fe2O3Photoelectrodes for Water Splitting: An Insight into the Structure/Property Interplay
author_id_str_mv 9fdabb7283ffccc5898cc543305475cf
author_id_fullname_str_mv 9fdabb7283ffccc5898cc543305475cf_***_Michael Warwick
author Michael Warwick
author2 Michael Warwick
Kimmo Kaunisto
Davide Barreca
Giorgio Carraro
Alberto Gasparotto
Chiara Maccato
Elza Bontempi
Cinzia Sada
Tero-Petri Ruoko
Stuart Turner
Gustaaf Van Tendeloo
format Journal article
container_title ACS Applied Materials &amp; Interfaces
container_volume 7
container_issue 16
container_start_page 8667
publishDate 2015
institution Swansea University
issn 1944-8244
1944-8252
doi_str_mv 10.1021/acsami.5b00919
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
url http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&amp;SrcAuth=ORCID&amp;SrcApp=OrcidOrg&amp;DestLinkType=FullRecord&amp;DestApp=WOS_CPL&amp;KeyUT=WOS:000353931300037&amp;KeyUID=WOS:000353931300037
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description Harvesting radiant energy to trigger water photoelectrolysis and produce clean hydrogen is receiving increasing attention in the search of alternative energy resources. In this regard, hematite (α-Fe2O3) nanostructures with controlled nano-organization have been fabricated and investigated for use as anodes in photoelectrochemical (PEC) cells. The target systems have been grown on conductive substrates by plasma enhanced-chemical vapor deposition (PE-CVD) and subjected to eventual ex situ annealing in air to further tailor their structure and properties. A detailed multitechnique approach has enabled to elucidate the interrelations between system characteristics and the generated photocurrent. The present α-Fe2O3 systems are characterized by a high purity and hierarchical morphologies consisting of nanopyramids/organized dendrites, offering a high contact area with the electrolyte. PEC data reveal a dramatic response enhancement upon thermal treatment, related to a more efficient electron transfer. The reasons underlying such a phenomenon are elucidated and discussed by transient absorption spectroscopy (TAS) studies of photogenerated charge carrier kinetics, investigated on different time scales for the first time on PE-CVD Fe2O3 nanostructures.
published_date 2015-12-31T19:05:51Z
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score 11.04748

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