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From amorphous to ordered: Structural transformation of Pd nanoclusters in 1-pentyne hydrogenation reactions

Kuo-Juei Hu, Peter R. Ellis, Christopher M. Brown, Peter T. Bishop, Richard Palmer Orcid Logo

Journal of Catalysis, Volume: 397, Pages: 58 - 63

Swansea University Author: Richard Palmer Orcid Logo

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Abstract

Nanostructured palladium catalysts are used industrially for selective alkyne hydrogenation reactions. However, structural changes can lead to a loss of performance. In this study, we show the evolution of the atomic structure of monodispersed Pd nanoclusters undergoing a vapour-phase 1-pentyne hydr...

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Published in: Journal of Catalysis
ISSN: 0021-9517
Published: Elsevier BV 2021
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa56682
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Abstract: Nanostructured palladium catalysts are used industrially for selective alkyne hydrogenation reactions. However, structural changes can lead to a loss of performance. In this study, we show the evolution of the atomic structure of monodispersed Pd nanoclusters undergoing a vapour-phase 1-pentyne hydrogenation reaction. A specific structural transformation, from amorphous to highly symmetrical structures, is observed at the atomic level with aberration-corrected scanning transmission electron microscopy (AC-STEM). This surprising behaviour which occurs concurrently with the alkyne hydrogenation reaction, is clearly size-dependent. The results provide new understanding of the long-term stability of commercial heterogeneous catalysts.
Keywords: Mass-selected, Palladium nanoclusters, AC-STEM, Alkyne hydrogenation
College: College of Engineering
Start Page: 58
End Page: 63