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Simultaneous oxidation of alcohols and hydrogen evolution in a hybrid system under visible light irradiation
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2018 (English)In: Applied Catalysis B: Environmental, ISSN 0926-3373, E-ISSN 1873-3883, Vol. 225, p. 258-263Article in journal (Refereed) Published
Abstract [en]

Water oxidation as a multi-electron transfer and endothermal reaction has been considered to be the bottleneck of solar-driven water splitting into oxygen and hydrogen. Herein, an alternative approach for solar energy conversion is developed by coupling H2 generation with the selective oxidation of alcohol. In a closed redox system containing molecular ruthenium catalyst (RuCat) and Pt modified g-C3N4 (Pt-g-C3N4) composite, hydrogen production is concomitant with the oxidation of benzyl alcohols to aldehydes with over 99% selectivity in the presence of visible light and pure water. By contrary, the system lacking molecular catalyst only exhibits low to moderate selectivities towards aldehydes. The remarkably improved selectivity is attributed to the formation of highly active Ru(IV) = O intermediate through efficient hole transfer from g-C3N4 to RuCat.

Place, publisher, year, edition, pages
Elsevier B.V. , 2018. Vol. 225, p. 258-263
Keywords [en]
Hybrid system, Hydrogen evolution, Molecular catalyst, Photocatalysis, Selective oxidation of alcohol, Aldehydes, Catalysts, Energy conversion, Hybrid systems, Hydrogen production, Light, Oxidation, Platinum, Redox reactions, Solar energy, Solar power generation, Molecular catalysts, Oxidation of alcohols, Ruthenium catalysts, Selective oxidation, Visible-light irradiation, Water oxidation, Water splitting, Catalyst selectivity
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-223108DOI: 10.1016/j.apcatb.2017.11.072ISI: 000424719300026Scopus ID: 2-s2.0-85037377116OAI: oai:DiVA.org:kth-223108DiVA, id: diva2:1185996
Note

QC 20180227

Available from: 2018-02-27 Created: 2018-02-27 Last updated: 2018-05-24Bibliographically approved

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Sun, Licheng

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