Effect of Cathodic Polarization of n-TiO_2 Thin Films on Their Photoresponse towards Water Splitting Reactions
- Creators
- Frites, Mourad
- Khan, Shahed U. M.
Abstract
Cathodic reduction of Titanium oxide (n-TiO_2) thin films was investigated as an alternative approach to customary hydrogen modification of n-TiO_2 under hydrogen gas stream at high temperature. Hydrogen modification of n-TiO_2 was carried out electrochemically under cathodic polarization. The photo-response of the electrochemically hydrogen modified n-TiO_2 (HM-n-TiO_2) exhibited a four-fold enhancement in their photoresponse compared to n-TiO_2 during water splitting under solar simulated light. The photoactivity of HM-n-TiO_2 suffers a substantial decrease after heat-treatment at 200°C, remarkably the photoactivity of these samples was fully repaired after re-hydrogenation under similar conditions. The electrodes were characterized using electrochemical and spectroscopic techniques.
Additional Information
© 2014 The Author(s). Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. Manuscript submitted August 13, 2014; revised manuscript received October 13, 2014. Published October 21, 2014. This was Paper 775 presented at the Orlando, Florida, Meeting of the Society, May 11-15, 2014. We gratefully acknowledge Dr. John Baltrus of NETL, DOE, Pittsburgh taking the XPS of n-TiO_2 and HM-n-TiO_2 samples.Attached Files
Published - ECS_Electrochem._Lett.-2014-Frites-H44-6.pdf
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Additional details
- Alternative title
- Effect of Cathodic Polarization of n-TiO2 Thin Films on Their Photoresponse towardsWater Splitting Reactions
- Eprint ID
- 52417
- Resolver ID
- CaltechAUTHORS:20141205-075155064
- Created
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2014-12-09Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field