On the role of bismuth as modifier in AuPdBi catalysts: Effects on liquid-phase oxidation and hydrogenation reactions
On the role of bismuth as modifier in AuPdBi catalysts: Effects on liquid-phase oxidation and hydrogenation reactions
There is much about the action of bismuth within heterogeneous catalysis that still require a deeper understanding. We observed that, when Bi was added to AuPd bimetallic nanoparticles (NPs) supported on activated carbon, Bi affected the activity and significantly alters the selectivity in two model liquid phase reactions, namely the oxidation of cinnamyl alcohol and the hydrogenation of cinnamaldehyde. A combination of transmission electron microscopy and X-ray absorption spectroscopy provided a detailed characterization of trimetallic AuPdBi systems. We propose that the introduction of bismuth on AuPd NPs results in a partial blockage of most active sites, limiting the occurrence of consecutive reactions.
EXAFS, Heterogeneous catalysis, Nanoalloys, Promoter
Campisi, Sebastiano
b4462871-7c4b-46cb-be36-ca409248ef3d
Capelli, Sofia
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Ferri, Michele
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Villa, Alberto
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Dann, Ellie
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Wade, Austin
344c4e9f-bc45-4aa0-96ec-ad37ea014c96
Wells, Peter P.
bc4fdc2d-a490-41bf-86cc-400edecf2266
Dimitratos, Nikolaos
a4385576-4a05-478b-8389-460bfb43412b
October 2021
Campisi, Sebastiano
b4462871-7c4b-46cb-be36-ca409248ef3d
Capelli, Sofia
83ebbed7-a251-47c4-8edd-a5e43d49d0b2
Ferri, Michele
9f24cd9c-0000-4da1-8934-7c26df86c789
Villa, Alberto
d1f6646b-f0d4-420c-8a52-c09663f46e5f
Dann, Ellie
23e0a05e-1994-4cef-9717-b45de8948919
Wade, Austin
344c4e9f-bc45-4aa0-96ec-ad37ea014c96
Wells, Peter P.
bc4fdc2d-a490-41bf-86cc-400edecf2266
Dimitratos, Nikolaos
a4385576-4a05-478b-8389-460bfb43412b
Campisi, Sebastiano, Capelli, Sofia, Ferri, Michele, Villa, Alberto, Dann, Ellie, Wade, Austin, Wells, Peter P. and Dimitratos, Nikolaos
(2021)
On the role of bismuth as modifier in AuPdBi catalysts: Effects on liquid-phase oxidation and hydrogenation reactions.
Catalysis Communications, 158, [106340].
(doi:10.1016/j.catcom.2021.106340).
Abstract
There is much about the action of bismuth within heterogeneous catalysis that still require a deeper understanding. We observed that, when Bi was added to AuPd bimetallic nanoparticles (NPs) supported on activated carbon, Bi affected the activity and significantly alters the selectivity in two model liquid phase reactions, namely the oxidation of cinnamyl alcohol and the hydrogenation of cinnamaldehyde. A combination of transmission electron microscopy and X-ray absorption spectroscopy provided a detailed characterization of trimetallic AuPdBi systems. We propose that the introduction of bismuth on AuPd NPs results in a partial blockage of most active sites, limiting the occurrence of consecutive reactions.
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Accepted/In Press date: 16 July 2021
Published date: October 2021
Additional Information:
Funding Information:
Authors thank Diamond Light Source for access to facilities SP8071. We would like to thank Prof. Grace Burke at the University of Manchester for providing access to the Scanning Transmission Electron Microscope.
Publisher Copyright:
© 2021
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
Keywords:
EXAFS, Heterogeneous catalysis, Nanoalloys, Promoter
Identifiers
Local EPrints ID: 451014
URI: http://eprints.soton.ac.uk/id/eprint/451014
ISSN: 1566-7367
PURE UUID: 3d1da4fd-8dbd-4cd6-9eb0-44ea37fcff42
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Date deposited: 02 Sep 2021 16:30
Last modified: 18 Mar 2024 03:02
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Contributors
Author:
Sebastiano Campisi
Author:
Sofia Capelli
Author:
Michele Ferri
Author:
Alberto Villa
Author:
Ellie Dann
Author:
Austin Wade
Author:
Nikolaos Dimitratos
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