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Water Splitting via Decoupled Photocatalytic Water Oxidation and Electrochemical Proton Reduction Mediated by Electron-Coupled-Proton Buffer
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2017 (English)In: Chemistry - An Asian Journal, ISSN 1861-4728, E-ISSN 1861-471X, Vol. 12, no 20, p. 2666-2669Article in journal (Refereed) Published
Abstract [en]

Water splitting mediated by electron-coupled-proton buffer (ECPB) provides an efficient way to avoid gas mixing by separating oxygen evolution from hydrogen evolution in space and time. Though electrochemical and photoelectrochemcial water oxidation have been incorporated in such a two-step water splitting system, alternative ways to reduce the cost and energy input for decoupling two half-reactions are desired. Herein, we show the feasibility of photocatalytic oxygen evolution in a powder system with BiVO4 as a photocatalyst and polyoxometalate H3PMo12O40 as an electron and proton acceptor. The resulting reaction mixture was allowed to be directly used for the subsequent hydrogen evolution with the reduced H3PMo12O40 as electron and proton donors. Our system exhibits excellent stability in repeated oxygen and hydrogen evolution, which brings considerable convenience to decoupled water splitting.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2017. Vol. 12, no 20, p. 2666-2669
Keywords [en]
electron-coupled-proton, buffer, oxygen evolution, photocatalysis, proton reduction, water splitting
National Category
Organic Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-217437DOI: 10.1002/asia.201701123ISI: 000413354300007PubMedID: 28885769Scopus ID: 2-s2.0-85030098742OAI: oai:DiVA.org:kth-217437DiVA, id: diva2:1158148
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QC 20171117

Available from: 2017-11-17 Created: 2017-11-17 Last updated: 2017-11-17Bibliographically approved

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Sun, Licheng

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