UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Crystallography and Electronic Structure of Model Metal Oxide Catalysts

Allan, Michael James; (2020) Crystallography and Electronic Structure of Model Metal Oxide Catalysts. Doctoral thesis (Ph.D), UCL (University College London). Green open access

[thumbnail of Allan__thesis.pdf]
Preview
Text
Allan__thesis.pdf

Download (31MB) | Preview

Abstract

This thesis embodies work studying multiple hydrogen producing metal oxide catalysts as both single crystals alongside ultra-thin films. The first catalyst study investigates the water splitting properties of titanium dioxide by scanning tunnelling microscopy. By exploring the excess electron distribution around hydroxyls upon water splitting at an oxygen vacancy, mechanistic details from the process, along with electronic properties of the surface have been resolved. The second catalyst explored is cerium dioxide ultra-thin films and studying both their oxidised and reduced states. As ceria is involved in the water-gas shift reaction, an important reaction which oxidises carbon monoxide with water to produce hydrogen and carbon dioxide, the understanding of its surface and any reconstructions is of great significance. This is studied by scanning tunnelling microscopy to understand the differences of the films, and high-resolution electron energy loss spectroscopy (HREELS) to give insight into the bonding environments that give rise to reconstructions. The third catalyst studied is ceria-zirconia mixed metal oxide. The addition of zirconia to ceria improves its performance in the water-gas shift reaction. By studying the redox behaviour of the catalyst in the form of an inverse model catalyst by LEED, XPEEM, XAS and XPS, the synergy understanding between both metals has been furthered.

Type: Thesis (Doctoral)
Qualification: Ph.D
Title: Crystallography and Electronic Structure of Model Metal Oxide Catalysts
Event: UCL (University College London)
Open access status: An open access version is available from UCL Discovery
Language: English
Additional information: Copyright © The Author 2020. Original content in this thesis is licensed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) Licence (https://creativecommons.org/licenses/by/4.0/). Any third-party copyright material present remains the property of its respective owner(s) and is licensed under its existing terms. Access may initially be restricted at the author’s request.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/10093651
Downloads since deposit
197Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item