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Reliable Performance Characterization of Mediated Photocatalytic Water-Splitting Half Reactions

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. 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/cssc.201601901DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/cssc.201601901/abstractPublisherArticle
ORCID:
AuthorORCID
Han, Lihao0000-0002-0452-3381
Lin, Meng0000-0001-7785-749X
Haussener, Sophia0000-0002-3044-1662
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
Funders:
Funding AgencyGrant Number
Swiss National Science Foundation (SNSF)155876
Subject Keywords:characterization; mediator; photocatalysis; titania; water splitting
Issue or Number:10
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:09 Mar 2020 13:18

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