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Issue 8, 2019
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Plasmonic Ru/hydrogen molybdenum bronzes with tunable oxygen vacancies for light-driven reduction of p-nitrophenol

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Abstract

To meet the requirement of high catalytic efficiency toward the reduction of toxic p-nitrophenol (PNP) to useful p-aminophenol (PAP), we herein report Ru supported on heavily hydrogen-doped semiconductors, specifically Ru/hydrogen molybdenum bronzes (Ru/HxMoO3−y), which is prepared via a facile H-spillover route. Detailed characterization by means of UV-vis-NIR diffuse reflectance, XRD, TEM, and XPS measurements reveals that Ru/HxMoO3−y (100) (100 means the hydrogen reduction temperature (°C)) exhibits strong visible light absorption with a plasmonic peak at around 690 nm, which can be tunable by varying its stoichiometry. Under visible light irradiation, the Ru/HxMoO3−y (100) hybrid displays superior catalytic activity to photocatalytic reduction of PNP relative to that under dark conditions, in which HxMoO3−y acts as electron-donor centres and Ru NPs act as active centres. More importantly, a proposed mechanism for the N–O bond reduction on the Ru/HxMoO3−y hybrid is presented. This study provides a new avenue to design efficient plasmonic metal/semiconductor hybrids for green chemistry.

Graphical abstract: Plasmonic Ru/hydrogen molybdenum bronzes with tunable oxygen vacancies for light-driven reduction of p-nitrophenol

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Publication details

The article was received on 03 Dec 2018, accepted on 15 Jan 2019 and first published on 17 Jan 2019


Article type: Paper
DOI: 10.1039/C8TA11604K
Citation: J. Mater. Chem. A, 2019,7, 3783-3789

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    Plasmonic Ru/hydrogen molybdenum bronzes with tunable oxygen vacancies for light-driven reduction of p-nitrophenol

    H. Yin, Y. Kuwahara, K. Mori, M. Che and H. Yamashita, J. Mater. Chem. A, 2019, 7, 3783
    DOI: 10.1039/C8TA11604K

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