Brazier, JB, Newton, MA, Barreiro, EM et al. (8 more authors) (2017) Effects of Cl on the reduction of supported PdO in ethanol/water solvent mixtures. Catalysis, Structure & Reactivity, 3 (1-2). pp. 54-62. ISSN 2055-074X
Abstract
The reduction of γ-Al2O3-supported PdO in flowing aqueous ethanol was investigated. Quick EXAFS (QEXAFS) performed at the Pd K-edge reveals that the presence of Cl can have a profound effect on the reduction process. At low loadings of Pd (1 wt-%), the size dependency of the process is inverted, compared to Cl-free samples. The extent of reduction was found to be dependent on loading/particles size. It is shown, using in situ QEXAFS at the Cl K- and Pd L3-edges, that residual Cl is not removed by the flowing solvent mixture, even at an elevated temperature of 350 K. The origins of these behaviours are discussed in terms of the differing effects that Cl may have when bonded to oxidic or reduced metal centres and the results were compared to earlier observations made on the effects of Cl on commercial polyurea encapsulated Pd ENCAT™ NP 30 catalysts.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and 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: | Quick EXAFS, chlorine, Palladium, green solvents, reduction, hydride formation, operando measurement |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Organic Chemistry (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 03 Jul 2017 13:14 |
Last Modified: | 03 Jul 2017 13:14 |
Status: | Published |
Publisher: | Taylor & Francis |
Identification Number: | 10.1080/2055074X.2016.1267296 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:118458 |