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Mesoporous Metal Oxide Encapsulated Gold Nanocatalysts: Enhanced Activity for Catalyst Application to Solvent-Free Aerobic Oxidation of Hydrocarbons
journal contribution
posted on 2018-10-02, 13:24 authored by Yali Liu, Tu-Nan Gao, Xi Chen, Kaiqian Li, Yali Ma, Hailong Xiong, Zhen-An QiaoHere,
we present a series of experimental studies to encapsulate ultrasmall
gold nanoparticles into mesoporous metal oxide via an in situ self-assembly
method. Notably, the 2.0Au@mZnO catalyst (∼2.0 nm gold nanoparticles
loading on mesoporous ZnO nanospheres) shows excellent catalytic activity
for indane oxidation (120 °C, conversion 88.5%) and affords much
high turnover frequencies (9521 h–1). The catalytic
activity of these gold-based catalysts was found to be correlated
with the size of gold nanoparticles and the types of metal oxide supports.
With a decrease in gold nanoparticle size, the catalytic conversion
efficiency of indane oxidation increased. In addition, such catalysts
possessed high thermal and chemical stability and could be reused
more than 10 times without a remarkable loss of catalytic activity.
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ultrasmall gold nanoparticlesgold nanoparticlesEnhanced Activitymesoporous ZnO nanospheresmesoporous metal oxideCatalyst ApplicationMesoporous Metal Oxide Encapsulated Gold Nanocatalystschemical stability10 timesgold nanoparticle sizeself-assembly methodSolvent-Free Aerobic Oxidationindane oxidationconversion efficiencymetal oxide
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