Martin, DJ;
Decarolis, D;
Tucoulou, R;
Martínez-Criado, G;
M. Beale, A;
(2017)
Towards the interrogation of the behaviour of a single nanoparticle under realistic catalytic reaction conditions.
Catalysis, Structure & Reactivity
, 3
(1-2)
pp. 63-70.
10.1080/2055074X.2016.1277655.
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Abstract
It is well known that particle size plays an important role in catalytic activity although the reason(s) why significant changes in activity are observed to occur with small changes in size are not well understood. The presence of particular facets, metal-support interactions, and redox state etc., are also capable of playing a role. The difficulty in realising which features are pertinent in a catalytic process stems from issues regarding sample complexity in typical heterogeneous catalysts, as well as technical challenges with instruments used to investigate samples in terms of their sensitivity and capability to distinguish between a specific vs. ensemble response in catalytically active vs. spectator species. We show here how the combination of using a synthesis method which achieves a discrete dispersion of metal Pd nanoparticles with a very narrow particle size distribution (σ ~ 1 nm) in combination with nano-beam X-ray spectroscopy allows us to follow the changes in redox state with time. Importantly, the data are obtained in one example, from an illuminating spot containing ca. 20 nanoparticles with an extremely small size distribution.
| Type: | Article |
|---|---|
| Title: | Towards the interrogation of the behaviour of a single nanoparticle under realistic catalytic reaction conditions |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1080/2055074X.2016.1277655 |
| Publisher version: | http://dx.doi.org/10.1080/2055074X.2016.1277655 |
| Language: | English |
| Additional information: | © 2017 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | Pd nanoparticles, nano-XANES, particle size, in situ |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1575745 |
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