標題: An efficient and recyclable copper nano-catalyst for the selective oxidation of benzene to p-benzoquinone (p-BQ) using H2O2(aq) in CH3CN
作者: Wanna, Wondemagegn Hailemichael
Ramu, Ravirala
Janmanchi, Damodar
Tsai, Yi-Fang
Thiyagarajan, Natarajan
Yu, Steve S. -F.
交大名義發表
National Chiao Tung University
關鍵字: Benzene;p-Benzoquinone;Copper;Hydrogen peroxide;Nanoparticle;Oxidation;Phenol;Catalysis
公開日期: 1-Feb-2019
摘要: The molecular copper complex tetrakis(acetonitrile)copper(I) perchlorate [Cu(CH3CN)(4)ClO4] (1) was shown to act as a catalyst precursor for the efficient oxidation of benzene to p-benzoquinone (p-BQ) with a percentage selectivity of 60-80% under mild conditions, and produces phenol (PhOH) as a minor product at room temperature. Here, we obtained evidences showing the formation of copper based nanoparticle catalyst (NC) (2) from 1 to be the vital step responsible for its ability to catalyze the conversion of benzene to p-BQ presumably via double oxidation. Addition of a considerable amount of H2O to the reaction mixture improved the selectivity for forming p-BQ to 84% and/or the conversion efficiency to 98%. In addition, the copper NC easily formed in situ through the oxidation of substrate using H2O2 in CH3CN. After separating the NC from the reaction mixture and recycling them several times, it still maintained comparable catalytic efficiency and selectivity for the conversion of benzene to p-BQ. (C) 2019 Elsevier Inc. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jcat.2019.01.005
http://hdl.handle.net/11536/148963
ISSN: 0021-9517
DOI: 10.1016/j.jcat.2019.01.005
期刊: JOURNAL OF CATALYSIS
Volume: 370
起始頁: 332
結束頁: 346
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