Gardecka, AJ;
Bishop, C;
Lee, D;
Corby, S;
Parkin, IP;
Kafizas, A;
Krumdieck, S;
(2018)
High efficiency water splitting photoanodes composed of nano-structured anatase-rutile TiO2 heterojunctions by pulsed-pressure MOCVD.
Applied Catalysis B: Environmental
, 224
pp. 904-911.
10.1016/j.apcatb.2017.11.033.
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Abstract
In this article, thin solid films are processed via pulsed-pressure metal organic chemical vapour deposition (PP-MOCVD) on FTO substrates over a range of processing times to produce a range of thicknesses and microstructures. The films are highly nanostructured anatase-rutile TiO2 composite films with unique single crystal dendrites. After annealing, carbon was removed, and materials showed improved water splitting activity; with IPCEs above 80% in the UV, photocurrents of ∼1.2 mA cm−2 at 1.23 VRHE at 1 sun irradiance and an extension of photoactivity into the visible range. The annealed material exhibits minimal recombination losses and IPCEs amongst the highest reported in the literature; attributed to the formation of a high surface area nanostructured material and synergetic interactions between the anatase and rutile phases.
| Type: | Article |
|---|---|
| Title: | High efficiency water splitting photoanodes composed of nano-structured anatase-rutile TiO2 heterojunctions by pulsed-pressure MOCVD |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.apcatb.2017.11.033 |
| Publisher version: | http://doi.org/10.1016/j.apcatb.2017.11.033 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Titanium dioxide (TiO2), anatase-rutile heterojunctions, solar water splitting, nanostructured photoelectrodes, PP-MOCVD |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10056306 |
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