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Effects of Cl on the reduction of supported PdO in ethanol/water mixtures

Title: Effects of Cl on the reduction of supported PdO in ethanol/water mixtures
Authors: Hii, KM
Brazier, JB
Item Type: Journal Article
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.
Issue Date: 21-Feb-2017
Date of Acceptance: 25-Nov-2016
URI: http://hdl.handle.net/10044/1/43860
DOI: https://dx.doi.org/10.1080/2055074X.2016.1267296
ISSN: 2055-074X
Publisher: Taylor & Francis
Start Page: 54
End Page: 62
Journal / Book Title: Catalysis, Structure & Reactivity
Volume: 3
Issue: 1-2
Replaces: 10044/1/48102
http://hdl.handle.net/10044/1/48102
Copyright Statement: © 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.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (E
Funder's Grant Number: EP/G070172/1
EP/L003279/1
Publication Status: Published
Open Access location: http://dx.doi.org/10.1080/2055074X.2016.1267296
Appears in Collections:Faculty of Engineering
Chemistry
Catalysis and Advanced Materials
Chemical Engineering
Faculty of Natural Sciences



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