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Indexed by:期刊论文

Date of Publication:2018-06-05

Journal:APPLIED CATALYSIS B-ENVIRONMENTAL

Included Journals:SCIE、EI

Volume:225

Page Number:258-263

ISSN No.:0926-3373

Key Words:Photocatalysis; Selective oxidation of alcohol; Hydrogen evolution; Molecular catalyst; Hybrid system

Abstract: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 Hy 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.