Anomalous diffusion of single metal atoms on a graphene oxide support

被引：26

作者：

Furnival, Tom ^{[1
]}

Leary, Rowan K. ^{[1
]}

Tyo, Eric C. ^{[2
]}

Vajda, Stefan ^{[2
]}

Ramasse, Quentin M. ^{[3
]}

Thomas, John Meurig ^{[1
]}

Bristowe, Paul D. ^{[1
]}

Midgley, Paul A. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Mat Sci & Met, 27 Charles Babbage Rd, Cambridge CB3 0FS, England

[2] Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA

[3] SuperSTEM Lab, SciTech Daresbury Campus,Keckwick Lane, Warrington WA4 4AD, Cheshire, England

来源：

CHEMICAL PHYSICS LETTERS | 2017年 / 683卷

基金：

欧洲研究理事会; 英国工程与自然科学研究理事会;

关键词：

Anomalous diffusion; Single atom catalysts; STEM; Graphene oxide; SURFACE-DIFFUSION; DYNAMICS; CATALYSIS; TRACKING; GROWTH;

D O I：

10.1016/j.cplett.2017.04.071

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Recent studies of single-atom catalysts open up the prospect of designing exceptionally active and environmentally efficient chemical processes. The stability and durability of such catalysts is governed by the strength with which the atoms are bound to their support and their diffusive behaviour. Here we use aberration-corrected STEM to image the diffusion of single copper adatoms on graphene oxide. We discover that individual atoms exhibit anomalous diffusion as a result of spatial and energetic disorder inherent in the support, and interpret the origins of this behaviour to develop a physical picture for the surface diffusion of single metal atoms. (C) 2017 Elsevier B.V. This is an open access article under the CC BY license.

引用

页码：370 / 374

页数：5

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