Chang, SY, Booth, SG, Uehara, A et al. (6 more authors) (2016) Energy dispersive-EXAFS of Pd nucleation at a liquid/liquid interface. Journal of Physics: Conference Series, 712. 012058. ISSN 1742-6588
Abstract
Energy dispersive extended X-ray absorption fine structure (EDE) has been applied to Pd nanoparticle nucleation at a liquid/liquid interface under control over the interfacial potential and thereby the driving force for nucleation. Preliminary analysis focusing on Pd K edge-step height determination shows that under supersaturated conditions the concentration of Pd near the interface fluctuate over a period of several hours, likely due to the continuous formation and dissolution of sub-critical nuclei. Open circuit potential measurements conducted ex-situ in a liquid/liquid electrochemical cell support this view, showing that the fluctuations in Pd concentration are also visible as variations in potential across the liquid/liquid interface. By decreasing the interfacial potential through inclusion of a common ion (tetraethylammonium, TEA+) the Pd nanoparticle growth rate could be slowed down, resulting in a smooth nucleation process. Eventually, when the TEA+ ions reached an equilibrium potential, Pd nucleation and particle growth were inhibited.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2016, The Authors. Published under licence by IOP Publishing. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Funding Information: | Funder Grant number Infineum Ltd PO 4500672762 Royal Academy of Engineering BRAGG Chair Diamond Light Source Ltd BRAGG Chair EPSRC EP/I013563/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 11 Jul 2016 14:00 |
Last Modified: | 05 Oct 2017 15:38 |
Published Version: | http://dx.doi.org/10.1088/1742-6596/712/1/012058 |
Status: | Published |
Publisher: | IOP Publishing |
Identification Number: | 10.1088/1742-6596/712/1/012058 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:102085 |