Superior activity of Rh1/ZnO single-atom catalyst for CO oxidation

被引：59

作者：

Han, Bing ^{[1
,2
]}

Lang, Rui ^{[1
]}

Tang, Hailian ^{[1
]}

Xu, Jia ^{[3
]}

Gu, Xiang-Kui ^{[4
]}

Qiao, Botao ^{[1
,5
]}

Liu, Jingyue Jingyue ^{[3
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, CAS Key Lab Sci & Technol Appl Catalysis, Dalian 116023, Liaoning, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA

[4] Wayne State Univ, Dept Chem Engn & Mat Sci, Detroit, MI 48202 USA

[5] Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China

来源：

CHINESE JOURNAL OF CATALYSIS | 2019年 / 40卷 / 12期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

Single-atom catalysis; Carbon monoxide oxidation; Rhodium; Zinc oxide nanowire; Density functional theory calculations; SUPPORTED SINGLE; WATER; AU; NANOPARTICLES; REDUCTION; OXYGEN; 1ST-PRINCIPLES; NANOCLUSTERS; DURABILITY; ACTIVATION;

D O I：

10.1016/S1872-2067(19)63411-X

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

CO oxidation is of great importance in both fundamental study and industrial application. Supported noble metal catalysts are highly active for CO oxidation but suffer from the scarcity and high cost. Single-atom catalysts (SACs) can maximize the metal atom efficiency. Herein, ZnO nanowire (ZnO-nw) supported Rh, Au, and Pt SACs were successfully developed to investigate their CO oxidation performance. Interestingly, it was found that Rh-1/ZnO-nw showed much higher activity than the other noble metals which are usually regarded as good candidates for CO oxidation. In addition, the Rh SAC possessed high stability in high-temperature CO oxidation under simulated conditions in the presence of water and hydrocarbons. The high activity and stability make Rh-1/ZnO-nw promising for practical applications, especially in the automotive exhaust emission control. Theoretical calculations indicate that the CO oxidation proceeds via the Mars-van Krevelen mechanism and the lowest barrier for the rate-limiting O-2 dissociation at a surface oxygen vacancy site is a key factor in determining the observed highest activity of Rh-1/ZnO-nw amongst the studied SACs. (C) 2019, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.

引用

页码：1847 / 1853

页数：7

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