Gold nanoparticles supported on mesoporous silica: origin of high activity and role of Au NPs in selective oxidation of cyclohexane

被引：72

作者：

Wu, Pingping ^{[1
]}

Bai, Peng ^{[1
]}

Yan, Zifeng ^{[1
]}

Zhao, George X. S. ^{[2
]}

机构：

[1] China Univ Petr, Sch Chem Engn, State Key Lab Heavy Oil Proc, PetroChina Key Lab Catalysis, Qingdao 266580, Peoples R China

[2] Univ Queensland, Sch Chem Engn, St Lucia, Qld 4072, Australia

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

基金：

中国国家自然科学基金;

关键词：

AGGREGATION-FREE; CATALYST; CLUSTERS; STABILIZATION; TITANIA;

D O I：

10.1038/srep18817

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Homogeneous immobilization of gold nanoparticles (Au NPs) on mesoporous silica has been achieved by using a one-pot synthesis method in the presence of organosilane mercapto-propyl-trimethoxysilane (MPTMS). The resultant Au NPs exhibited an excellent catalytic activity in the solvent-free selective oxidation of cyclohexane using molecular oxygen. By establishing the structure-performance relationship, the origin of the high activity of mesoporous supported Au catalyst was identified to be due to the presence of low-coordinated Au (0) sites with high dispersion. Au NPs were confirmed to play a critical role in the catalytic oxidation of cyclohexane by promoting the activation of O-2 molecules and accelerating the formation of surface-active oxygen species.

引用

页数：11

共 32 条

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