{"title":"Dual-productive photoredox cascade catalyst for solar hydrogen production and methylarene oxidation","authors":"Atsushi Kobayashi","doi":"10.1039/d4cy00544a","DOIUrl":null,"url":null,"abstract":"Solar H<small><sub>2</sub></small> production during the transformation of organic compounds is a promising approach to supply both H<small><sub>2</sub></small> and organic chemicals necessary for a sustainable carbon neutral society. To create such a dual-productive photocatalytic system, we developed a photoredox cascade catalytic (PRCC) system by combining a dual-dye sensitized Pt–TiO<small><sub>2</sub></small> photocatalyst (DDSP) and an <em>N</em>-hydroxyphthalimide (NHPI) hydrogen atom transfer (HAT) catalyst. DDSP successfully evolved H<small><sub>2</sub></small> upon blue-light excitation and simultaneously oxidized NHPI to generate phthalimido-<em>N</em>-oxyl radicals (PINO˙) which produced oxidized methylarenes by the HAT reaction of the benzylic/allylic C–H bond, followed by a radical coupling reaction. The significantly higher activity of DDSP than that of single-dye sensitized analogue (SDSP) suggests that the dual-dye layer acted as an efficent separator to spatially divide the two reaction fields, while separating the electron–hole pairs produced by light absorption with high efficiency.","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":4.4000,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Science & Technology","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1039/d4cy00544a","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Solar H2 production during the transformation of organic compounds is a promising approach to supply both H2 and organic chemicals necessary for a sustainable carbon neutral society. To create such a dual-productive photocatalytic system, we developed a photoredox cascade catalytic (PRCC) system by combining a dual-dye sensitized Pt–TiO2 photocatalyst (DDSP) and an N-hydroxyphthalimide (NHPI) hydrogen atom transfer (HAT) catalyst. DDSP successfully evolved H2 upon blue-light excitation and simultaneously oxidized NHPI to generate phthalimido-N-oxyl radicals (PINO˙) which produced oxidized methylarenes by the HAT reaction of the benzylic/allylic C–H bond, followed by a radical coupling reaction. The significantly higher activity of DDSP than that of single-dye sensitized analogue (SDSP) suggests that the dual-dye layer acted as an efficent separator to spatially divide the two reaction fields, while separating the electron–hole pairs produced by light absorption with high efficiency.
期刊介绍:
A multidisciplinary journal focusing on cutting edge research across all fundamental science and technological aspects of catalysis.
Editor-in-chief: Bert Weckhuysen
Impact factor: 5.0
Time to first decision (peer reviewed only): 31 days