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Energy‐dispersive diffraction studies of inert anodes
Author(s) -
Scarlett Nicola V. Y.,
Madsen Ian C.,
Evans John S. O.,
Coelho Alan A.,
McGregor Katherine,
Rowles Matthew,
Lanyon Marshall R.,
Urban Andrew J.
Publication year - 2009
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889809008681
Subject(s) - diffraction , synchrotron , inert , materials science , electrolysis , rietveld refinement , anode , phase (matter) , analytical chemistry (journal) , x ray crystallography , work (physics) , optics , chemistry , thermodynamics , electrode , physics , electrolyte , organic chemistry , chromatography
A tomographic study of electrochemical cells to observe scales formed on inert anodes has been conducted using energy‐dispersive synchrotron X‐ray diffraction. This study is preparatory to an investigation that will observe this formation in situ during the cells' operation. The purpose of the current work was to determine whether this technique would be appropriate for such a study in terms of its sensitivity and whether the results could be quantified satisfactorily. A method has been developed for the quantitative phase analysis of energy‐dispersive data using crystal‐structure‐based Rietveld refinement. This has been tested with standard materials and found to be comparable in accuracy to results obtained from traditional angular‐dispersive diffraction. The lower limits of detection of the method have not been established quantitatively but qualitative differences can be seen between cells that have been cycled at different times. These differences indicate a linear relationship between scale formation and electrolysis time.