Han, Lihao and Lin, Meng and Haussener, Sophia (2017) Reliable Performance Characterization of Mediated Photocatalytic Water-Splitting Half Reactions. ChemSusChem, 10 (10). pp. 2158-2166. ISSN 1864-5631. doi:10.1002/cssc.201601901. https://resolver.caltech.edu/CaltechAUTHORS:20170317-084105989
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Abstract
Photocatalytic approaches using two sets of semiconductor particles and a pair of redox-shuttle mediators are considered as a safe and economic solution for solar water splitting. Here, accurate experimental characterization techniques for photocatalytic half reactions are reported, investigating the gas as well as the liquid products. The methods are exemplified utilizing photocatalytic titania particles in an iron-based aqueous electrolyte for effective oxygen evolution and mediator reduction reactions under illumination. Several product characterization methods, including an optical oxygen sensor, pressure sensor, gas chromatography, and UV/Vis spectroscopy are used and compared for accurate, high-resolution gas-products and mediator conversion measurements. Advantages of each technique are discussed. A high Faraday efficiency of 97.5±2 % is calculated and the reaction rate limits are investigated.
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| Additional Information: | © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Issue online: 22 May 2017; Version of record online: 16 March 2017; Accepted manuscript online: 30 January 2017; Manuscript Revised: 30 January 2017; Manuscript Received: 27 December 2016. Funded by: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung. Grant Number: 155876 | |||||||||
| Group: | JCAP | |||||||||
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| Subject Keywords: | characterization; mediator; photocatalysis; titania; water splitting | |||||||||
| Issue or Number: | 10 | |||||||||
| DOI: | 10.1002/cssc.201601901 | |||||||||
| Record Number: | CaltechAUTHORS:20170317-084105989 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20170317-084105989 | |||||||||
| Official Citation: | L. Han, M. Lin, S. Haussener, ChemSusChem 2017, 10, 2158 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 75196 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Tony Diaz | |||||||||
| Deposited On: | 17 Mar 2017 16:14 | |||||||||
| Last Modified: | 15 Nov 2021 16:31 |
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