The University of Southampton
University of Southampton Institutional Repository

Characterising catalyst preparation: from adsorbed precursor complex to catalyst particle

Characterising catalyst preparation: from adsorbed precursor complex to catalyst particle
Characterising catalyst preparation: from adsorbed precursor complex to catalyst particle
Catalyst performance can be enhanced by the high dispersion of precious metals onto supports. The deposition of metal particles and the structural arrangement they adopt once impregnated on a support is therefore of interest in determining the necessary conditions required for maximum catalyst efficiency. The details of the relationship between precursor and the final catalyst structure have not been extensively investigated; therefore it is the aim of this project to examine this relationship using techniques such as EXAFS, XRD and TEM.
A selection of Pt and Pd precursors has been deposited onto both Al2O3 and SiO2 supports and the resulting materials examined using these characterisation methods. Bimetallic combinations of these precursors have also been prepared and characterised.
The EXAFS showed that the ligand stays intact during adsorption onto the support and that it is lost during heating. The type of support used had an effect on the dispersion of both the monometallic and bimetallic catalysts and also on the type of bimetallic particle formed. Al2O3 supported bimetallic particles consisted of a Pt rich core with a Pd outer shell whilst SiO2 supported bimetallic particles were made up of a mixture of monometallic Pt and Pd particles and bimetallic Pt/Pd particles.
Blaney, Katie Bethan
d031090f-61b8-4d15-a7d9-d45c74877658
Blaney, Katie Bethan
d031090f-61b8-4d15-a7d9-d45c74877658
Russell, Andrea
b6b7c748-efc1-4d5d-8a7a-8e4b69396169

Blaney, Katie Bethan (2009) Characterising catalyst preparation: from adsorbed precursor complex to catalyst particle. University of Southampton, School of Chemistry, Doctoral Thesis, 198pp.

Record type: Thesis (Doctoral)

Abstract

Catalyst performance can be enhanced by the high dispersion of precious metals onto supports. The deposition of metal particles and the structural arrangement they adopt once impregnated on a support is therefore of interest in determining the necessary conditions required for maximum catalyst efficiency. The details of the relationship between precursor and the final catalyst structure have not been extensively investigated; therefore it is the aim of this project to examine this relationship using techniques such as EXAFS, XRD and TEM.
A selection of Pt and Pd precursors has been deposited onto both Al2O3 and SiO2 supports and the resulting materials examined using these characterisation methods. Bimetallic combinations of these precursors have also been prepared and characterised.
The EXAFS showed that the ligand stays intact during adsorption onto the support and that it is lost during heating. The type of support used had an effect on the dispersion of both the monometallic and bimetallic catalysts and also on the type of bimetallic particle formed. Al2O3 supported bimetallic particles consisted of a Pt rich core with a Pd outer shell whilst SiO2 supported bimetallic particles were made up of a mixture of monometallic Pt and Pd particles and bimetallic Pt/Pd particles.

PDF
Complete_thesis_including_title_page_and_abstract.pdf - Other
Download (10MB)

More information

Published date: June 2009
Organisations: University of Southampton

Identifiers

Local EPrints ID: 72952
URI: https://eprints.soton.ac.uk/id/eprint/72952
PURE UUID: 50886f9b-2a31-4ece-bf3a-fdaf64e12cd1
ORCID for Andrea Russell: ORCID iD orcid.org/0000-0002-8382-6443

Catalogue record

Date deposited: 16 Mar 2010
Last modified: 06 Jun 2018 12:58

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×