Energy dispersive-EXAFS of Pd nucleation at a liquid/liquid interface
(2016) 16th International Conference on X-Ray Absorption Fine Structure, XAFS 2015 In Journal of Physics: Conference Series 712.- 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... (More)
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.
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- author
- Chang, S. Y. ; Booth, S. G. LU ; Uehara, A. ; Mosselmans, J. F.W. ; Cibin, G. ; Pham, Van-Thai LU ; Nataf, L. ; Dryfe, R. A.W. and Schroeder, S. L.M. LU
- publishing date
- 2016-01-01
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- lund university
- series title
- Journal of Physics: Conference Series
- volume
- 712
- edition
- 1
- conference name
- 16th International Conference on X-Ray Absorption Fine Structure, XAFS 2015
- conference location
- Karlsruhe, Germany
- conference dates
- 2015-08-23 - 2015-08-28
- external identifiers
-
- scopus:84978737251
- ISSN
- 1742-6588
- DOI
- 10.1088/1742-6596/712/1/012058
- language
- English
- LU publication?
- no
- id
- e3c3d3c5-05b4-4f57-b013-dccf1bb75c15
- date added to LUP
- 2019-06-30 09:34:59
- date last changed
- 2022-01-31 22:55:42
@inproceedings{e3c3d3c5-05b4-4f57-b013-dccf1bb75c15,
abstract = {{<p>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<sup>+</sup>) the Pd nanoparticle growth rate could be slowed down, resulting in a smooth nucleation process. Eventually, when the TEA<sup>+</sup> ions reached an equilibrium potential, Pd nucleation and particle growth were inhibited.</p>}},
author = {{Chang, S. Y. and Booth, S. G. and Uehara, A. and Mosselmans, J. F.W. and Cibin, G. and Pham, Van-Thai and Nataf, L. and Dryfe, R. A.W. and Schroeder, S. L.M.}},
booktitle = {{lund university}},
issn = {{1742-6588}},
language = {{eng}},
month = {{01}},
series = {{Journal of Physics: Conference Series}},
title = {{Energy dispersive-EXAFS of Pd nucleation at a liquid/liquid interface}},
url = {{http://dx.doi.org/10.1088/1742-6596/712/1/012058}},
doi = {{10.1088/1742-6596/712/1/012058}},
volume = {{712}},
year = {{2016}},
}