Visualisation of single atom dynamics and their role in nanocatalysts under controlled reaction environments

Pratibha L. Gai; Leonardo Lari; Michael R. Ward; Edward D. Boyes

doi:10.1016/j.cplett.2013.12.038

Visualisation of single atom dynamics and their role in nanocatalysts under controlled reaction environments

Pratibha L. Gai^*, Leonardo Lari, Michael R. Ward, Edward D. Boyes

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Direct real time studies of reacting individual atoms in technologically important gold and platinum nanocatalysts in controlled reducing and oxidising gas environments and operating temperatures using novel environmental scanning transmission electron microscopy (ESTEM) with single atom sensitivity are presented. The direct in situ observations provide new insights into the dynamic behaviour of single atoms which may be important as catalytic active sites as well as migrating as part of deactivation mechanisms. The single atom dynamics reveal that the primary role of nanoparticles in the catalysts is to act as reservoir of ad-atoms or clusters. Possible reaction mechanisms are described briefly.

Original language	English
Pages (from-to)	355-359
Number of pages	5
Journal	Chemical Physics Letters
Volume	592
DOIs	https://doi.org/10.1016/j.cplett.2013.12.038
Publication status	Published - 30 Jan 2014

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10.1016/j.cplett.2013.12.038

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abstract = "Direct real time studies of reacting individual atoms in technologically important gold and platinum nanocatalysts in controlled reducing and oxidising gas environments and operating temperatures using novel environmental scanning transmission electron microscopy (ESTEM) with single atom sensitivity are presented. The direct in situ observations provide new insights into the dynamic behaviour of single atoms which may be important as catalytic active sites as well as migrating as part of deactivation mechanisms. The single atom dynamics reveal that the primary role of nanoparticles in the catalysts is to act as reservoir of ad-atoms or clusters. Possible reaction mechanisms are described briefly.",

author = "Gai, {Pratibha L.} and Leonardo Lari and Ward, {Michael R.} and Boyes, {Edward D.}",

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AU - Gai, Pratibha L.

AU - Lari, Leonardo

AU - Ward, Michael R.

AU - Boyes, Edward D.

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Y1 - 2014/1/30

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AB - Direct real time studies of reacting individual atoms in technologically important gold and platinum nanocatalysts in controlled reducing and oxidising gas environments and operating temperatures using novel environmental scanning transmission electron microscopy (ESTEM) with single atom sensitivity are presented. The direct in situ observations provide new insights into the dynamic behaviour of single atoms which may be important as catalytic active sites as well as migrating as part of deactivation mechanisms. The single atom dynamics reveal that the primary role of nanoparticles in the catalysts is to act as reservoir of ad-atoms or clusters. Possible reaction mechanisms are described briefly.

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U2 - 10.1016/j.cplett.2013.12.038

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VL - 592

SP - 355

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JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -

Visualisation of single atom dynamics and their role in nanocatalysts under controlled reaction environments

Abstract

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