Comptes Rendus
no. 2-3
Electron microscopy / Microscopie électronique
Visualising reacting single atoms under controlled conditions: Advances in atomic resolution in situ Environmental (Scanning) Transmission Electron Microscopy (E(S)TEM)
[Voir des atomes individuels en cours de réaction sous conditions contrôlées : Progrès récents en microscopie électronique (à balayage) en transmission environnementale in situ (E(S)TEM)]
Edward D. Boyes1, 2, 3  ; Pratibha L. Gai1, 2, 4
1 The York JEOL Nanocentre, Department of Physics, University of York, Heslington, York, YO10 5DD, UK
2 Department of Physics, University of York, York YO10 5DD, UK
3 Department of Electronics, University of York, York YO10 5DD, UK
4 Department of Chemistry, University of York, York YO10 5DD, UK
Comptes Rendus. Physique, Volume 15 (2014) no. 2-3, pp. 200-213.

On décrit ici les progrès réalisés en microscopie électronique (à balayage) en transmission (E(S)TEM) pour étudier in situ les réactions catalytiques solide–gaz au niveau de la résolution atomique sous des conditions environnementales contrôlées en pression et en température. Les récents développements de l'ESTEM ont permis la première visualisation directe en temps réel d'atomes individuels et de la structure atomique de catalyseurs solides hétérogènes dans leurs conditions de réaction. Ils donnent accès à une meilleure connaissance des processus atomiques dynamiques à la surface des solides et à leurs mécanismes de fonctionnement. Les bénéfices apportés par cette nouvelle génération de microscopes ESTEM à la science et à la technologie sont nombreux. Ils doivent conduire à la mise en œuvre de procédés technologiques améliorés, avec des retombées fructueuses en termes de bénéfices économiques, de soins de santé améliorés, de réductions des besoins énergétiques et de gestion des déchets.

Advances in atomic resolution Environmental (Scanning) Transmission Electron Microscopy (E(S)TEM) for probing gas–solid catalyst reactions in situ at the atomic level under controlled reaction conditions of gas environment and temperature are described. The recent development of the ESTEM extends the capability of the ETEM by providing the direct visualisation of single atoms and the atomic structure of selected solid state heterogeneous catalysts in their working states in real-time. Atomic resolution E(S)TEM provides a deeper understanding of the dynamic atomic processes at the surface of solids and their mechanisms of operation. The benefits of atomic resolution-E(S)TEM to science and technology include new knowledge leading to improved technological processes with substantial economic benefits, improved healthcare, reductions in energy needs and the management of environmental waste generation.

Publié le :
DOI : 10.1016/j.crhy.2014.01.002
Keywords: In situ electron microscopy, Catalytic reactions, Atomic resolution, Interactions atom–solid surface
Mot clés : Microscopie électronique in situ, Réactions catalytiques, Résolution atomique, Interactions atomes–surface solide
Edward D. Boyes 1, 2, 3 ; Pratibha L. Gai 1, 2, 4

1 The York JEOL Nanocentre, Department of Physics, University of York, Heslington, York, YO10 5DD, UK
2 Department of Physics, University of York, York YO10 5DD, UK
3 Department of Electronics, University of York, York YO10 5DD, UK
4 Department of Chemistry, University of York, York YO10 5DD, UK 
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Edward D. Boyes; Pratibha L. Gai. Visualising reacting single atoms under controlled conditions: Advances in atomic resolution in situ Environmental (Scanning) Transmission Electron Microscopy (E(S)TEM). Comptes Rendus. Physique, Volume 15 (2014) no. 2-3, pp. 200-213. doi : 10.1016/j.crhy.2014.01.002. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2014.01.002/

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