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论文类型：期刊论文

发表时间：2018-06-05

发表刊物：APPLIED CATALYSIS B-ENVIRONMENTAL

收录刊物：SCIE、EI

卷号：225

页面范围：258-263

ISSN号：0926-3373

关键字：Photocatalysis; Selective oxidation of alcohol; Hydrogen evolution; Molecular catalyst; Hybrid system

摘要：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.