Facet-dependent anchoring of gold nanoparticles on TiO2 for CO oxidation

被引：28
作者：
Shao, Bin [1 ,2 ,3 ]
Zhao, Wenning [1 ,3 ]
Miao, Shu [1 ]
Huang, Jiahui [1 ,2 ]
Wang, Lili [1 ,2 ]
Li, Gao [1 ]
Shen, Wenjie [1 ]
机构：
[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
[2] Chinese Acad Sci, Dalian Inst Chem Phys, Gold Catalysis Res Ctr, Dalian 116023, Liaoning, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
CHINESE JOURNAL OF CATALYSIS | 2019年 / 40卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Au nanoparticles; Titanium dioxide; Stability; Interfacial perimeter; CO oxidation; LOW-TEMPERATURE OXIDATION; AU/TIO2; CATALYSTS; SIZE; ACTIVATION; MECHANISM; CLUSTERS; HYDROGEN; OXYGEN;
D O I：
10.1016/S1872-2067(19)63388-7
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The interfacial perimeter of gold nanocatalysts is popularly viewed as the active sites for a number of chemical reactions, while the geometrical structure of the interface at atomic scale is less known. Here, TiO2-nanosheets and nanospindles were adapted to accommodate Au particles (similar to 2.2 nm), forming Au-TiO2{001} and Au-TiO2{101} interfaces. Upon calcination at 623 K in air, HAADF-STEM images evidenced that the Au particles on TiO2{101} enlarged to 3.1 nm and these on TiO2{001} remained unchanged, suggesting the stronger metal-support interaction on TiO2{001}. Au/TiO2{001} was more active for CO oxidation than Au/TiO2{101} system. (C) 2019, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：1534 / 1539
页数：6
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