Surface science insight note: A linear algebraic approach to elucidate native films on Fe3O4 surface

Bargiela, Pascal, Fernandez, Vincent, Morgan, David ORCID: https://orcid.org/0000-0002-6571-5731, Fairley, Neal and Baltrusaitis, Jonas 2024. Surface science insight note: A linear algebraic approach to elucidate native films on Fe3O4 surface. Surface and Interface Analysis 56 (4) , pp. 189-199. 10.1002/sia.7290

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Abstract

Standard materials are often used to obtain spectra that can be compared to those from unknown samples. Spectra measured from these known substances are also used as a means of computing sensitivity factors to allow quantification by X‐ray photoelectron spectroscopy (XPS) of less well‐defined materials. Spectra from known materials also provide line shapes suitable for inclusion in spectral models which, when fitted to spectra, permit the chemical state for a sample to be assessed. Both types of information depend on isolating photoemission signals from the inelastically scattered signal. In this Insight note, technical issues associated with the use of XPS of as received Fe3O4 powder sample surface are discussed. The Insight note is designed to show how linear algebraic techniques applied to data collected from a sample marketed as pure Fe3O4 powder are used to verify that XPS has been performed on chemistry representative of the sample. The methods described in this Insight note can further be utilized in elucidating complex XPS data obtained from thin films formed or evolved during cyclic/non‐steady use of complex (electro)catalyst surfaces, especially in the presence of contaminants.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Cardiff Catalysis Institute (CCI) Chemistry
Additional Information:	License information from Publisher: LICENSE 1: URL: http://creativecommons.org/licenses/by-nc/4.0/
Publisher:	Wiley
ISSN:	0142-2421
Funders:	U.S. Department of Energy
Date of First Compliant Deposit:	11 April 2024
Date of Acceptance:	15 January 2024
Last Modified:	11 Apr 2024 11:14
URI:	https://orca.cardiff.ac.uk/id/eprint/165985

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