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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/14592

Title: The use of XAFS to determine the nature of interaction of iron and molybdenum metal salts within PS-b-P2VP micelles
Authors: RISKIN, Alexander
Beale, Andrew Michael
BOYEN, Hans-Gerhard
Vantomme, André
VAN BAEL, Marlies
Issue Date: 2013
Citation: PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 15 (5), p. 1675-1681
Abstract: The poly(styrene)-block-poly(2-vinylpyridine) (PS-b-P2VP) micelle route is a well established method for the preparation of bimetallic nanoparticles used for the catalysis of carbon nanotubes and other applications like ultrahigh density storage devices, yet to date no information is available concerning the internal structure of the P2VP-metal salt complex. For the first time, XAFS measurements were performed on micelles loaded with either iron(III) chloride or molybdenum(V) chloride and a combination of both. Analysis of the data revealed that iron is tetrahedrally coordinated within the core, whereas molybdenum is octahedrally coordinated in the pure loaded micelles and trigonally coordinated in the mixed micelles. For the bimetallic samples, analysis of the Fe and Mo K-edge data revealed the existence of an interaction between iron and molybdenum. This approach to obtain detailed structural information during the preparation of these catalyst samples will allow for a deeper understanding of the effects of structure on the function of catalysts used for CNT growth i.e. to explain differences in yield as well as potentially providing a deeper understanding of the CNT growth mechanism itself.
Notes: [Riskin, Alexander; Hardy, An; Van Bael, Marlies K.] Hasselt Univ, Inst Mat Res, B-3590 Diepenbeek, Belgium. [Beale, Andrew M.] Univ Utrecht, Debye Inst Nanomat Sci, NL-3584 CG Utrecht, Netherlands. [Boyen, Hans-Gerhard; Van Bael, Marlies K.] UHasselt, IMOMEC, Nanostruct Phys Grp, B-3590 Diepenbeek, Belgium. [Vantomme, Andre] Katholieke Univ Leuven, Inst Kern & Stralingsfys, B-3001 Louvain, Belgium. a.m.beale@uu.nl; hansgerd.boyen@uhasselt.be; andre.vantomme@fys.kuleuven.be; marlies.vanbael@uhasselt.be
URI: http://hdl.handle.net/1942/14592
DOI: 10.1039/c2cp43046k
ISI #: 000313565300037
ISSN: 1463-9076
Category: A1
Type: Journal Contribution
Validation: ecoom, 2014
Appears in Collections: Research publications

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