Selective Oxidation of Alkenes by Dioxygen Using Modified Gold Nanoclusters

IF 1.4 Q3 CHEMISTRY, MULTIDISCIPLINARY

Physical Chemistry Research Pub Date : 2020-09-01 DOI:10.22036/PCR.2020.220761.1735

H. Salari, M. Gholami

引用次数: 0

Abstract

Selective oxidation of cyclohexene and styrene was investigated using molecular oxygen under mild conditions. Au/TiO2 and Au/Al2O3 surfaces were impregnated with three different ionic liquids. Supported ionic liquids (ILs) gold nanocatalysts are particularly versatile catalysts for oxidation reaction with exceptionally high efficiency and significant selectivity. Improved activity is attributed to the stabilization of reaction intermediates via different interaction such as hydrogen bonding and polarity/dipolarizability between ILs and intermediates. Surface coating of obtained nanoparticles with ionic liquids is found to increase the interaction energy. The estimated rate constant decreases in the following order: [EAP] > [bmim]PF6 > [emim]EtSO4. EAP/Au/Al2O3 exhibited maximum conversion compare to other IL-impregnated catalysts. Supported ionic liquids gold nanocatalysts are active catalysts for oxidation reaction with high efficiency and selectivity.

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改性金纳米团簇对烯烃的选择性氧化研究

在温和条件下研究了分子氧对环己烯和苯乙烯的选择性氧化。用三种不同的离子液体浸渍Au/TiO2和Au/Al2O3表面。负载型离子液体(ILs)金纳米催化剂是一种特别通用的氧化反应催化剂，具有非常高的效率和显著的选择性。活性的提高是由于反应中间体通过不同的相互作用(如氢键和中间体之间的极性/偶极性)而稳定。结果表明，离子液体在纳米颗粒表面包覆可提高相互作用能。估算的速率常数递减顺序为:[EAP] > [bmim]PF6 > [emim]EtSO4。与其他il浸渍催化剂相比，EAP/Au/Al2O3的转化率最高。负载型离子液体金纳米催化剂是一种高效、选择性高的氧化反应活性催化剂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical Chemistry Research CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

2.70

自引率

8.30%

发文量

期刊介绍： The motivation for this new journal is the tremendous increasing of useful articles in the field of Physical Chemistry and the related subjects in recent years, and the need of communication between Physical Chemists, Physicists and Biophysicists. We attempt to establish this fruitful communication and quick publication. High quality original papers in English dealing with experimental, theoretical and applied research related to physics and chemistry are welcomed. This journal accepts your report for publication as a regular article, review, and Letter. Review articles discussing specific areas of physical chemistry of current chemical or physical importance are also published. Subjects of Interest: Thermodynamics, Statistical Mechanics, Statistical Thermodynamics, Molecular Spectroscopy, Quantum Chemistry, Computational Chemistry, Physical Chemistry of Life Sciences, Surface Chemistry, Catalysis, Physical Chemistry of Electrochemistry, Kinetics, Nanochemistry and Nanophysics, Liquid Crystals, Ionic Liquid, Photochemistry, Experimental article of Physical chemistry. Mathematical Chemistry.