Journal article 546 views
Vapor Phase Processing of α-Fe2O3Photoelectrodes for Water Splitting: An Insight into the Structure/Property Interplay
,
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
Full text not available from this repository: check for access using links below.
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...
| Published in: | ACS Applied Materials & Interfaces |
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| ISSN: | 1944-8244 1944-8252 |
| Published: |
2015
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa32767 |
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| 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 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. |
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| Keywords: |
hematite; hierarchical structures; PE-CVD; PEC; transient absorption spectroscopy; water splitting |
| College: |
Faculty of Science and Engineering |
| Issue: |
16 |
| Start Page: |
8667 |
| End Page: |
8676 |