{"title":"Synergistic enhancement of hydrogen peroxide generation: WO3 photocatalyst modified with MXene and Au nanoparticles under visible light†","authors":"Xiaoyu Sun , Teruhisa Ohno","doi":"10.1039/d4cy00443d","DOIUrl":null,"url":null,"abstract":"<div><p>A novel composite material composed of WO<sub>3</sub>, Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene, and Au for the photocatalytic formation of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) is introduced here. Through optimization, the ideal MXene and Au concentrations were determined to be both 0.5%. And after loading Au and MXene the amount of H<sub>2</sub>O<sub>2</sub> generated increases to 7.52 mg L<sup>−1</sup> at pH 3, which is a remarkable 21.5-fold increase. Quenching experiments unequivocally revealed identified ·O<sub>2</sub><sup>−</sup> as the predominant intermediate product, indicating a two-stage, single-electron indirect mechanism. Enhanced effectiveness for H<sub>2</sub>O<sub>2</sub> synthesis is ascribed to the synergistic impact of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene and gold, enhancing charge transfer efficiency while impeding the recombination of these electron–hole pairs.</p></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":4.4000,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Science & Technology","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/org/science/article/pii/S2044475324002922","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
A novel composite material composed of WO3, Ti3C2Tx MXene, and Au for the photocatalytic formation of hydrogen peroxide (H2O2) is introduced here. Through optimization, the ideal MXene and Au concentrations were determined to be both 0.5%. And after loading Au and MXene the amount of H2O2 generated increases to 7.52 mg L−1 at pH 3, which is a remarkable 21.5-fold increase. Quenching experiments unequivocally revealed identified ·O2− as the predominant intermediate product, indicating a two-stage, single-electron indirect mechanism. Enhanced effectiveness for H2O2 synthesis is ascribed to the synergistic impact of Ti3C2Tx MXene and gold, enhancing charge transfer efficiency while impeding the recombination of these electron–hole pairs.
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
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