Gerstl, Matthias
[Author];
Nenning, Andreas
[Author];
Iskandar, Riza
[Author];
Rojek-Wöckner, Veronika
[Author];
Bram, Martin
[Author];
Hutter, Herbert
[Author];
Opitz, Alexander Karl
[Author]
The Sulphur Poisoning Behaviour of Gadolinia Doped Ceria Model Systems in Reducing Atmospheres
You can manage bookmarks using lists, please log in to your user account for this.
Media type:
E-Article
Title:
The Sulphur Poisoning Behaviour of Gadolinia Doped Ceria Model Systems in Reducing Atmospheres
Contributor:
Gerstl, Matthias
[Author];
Nenning, Andreas
[Author];
Iskandar, Riza
[Author];
Rojek-Wöckner, Veronika
[Author];
Bram, Martin
[Author];
Hutter, Herbert
[Author];
Opitz, Alexander Karl
[Author]
imprint:
MDPI, 2016
Published in:Materials 9(8), 649 (2016). doi:10.3390/ma9080649
Language:
English
DOI:
https://doi.org/10.3390/ma9080649
ISSN:
1996-1944
Origination:
Footnote:
Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
Description:
An array of analytical methods including surface area determination by gas adsorption using the Brunauer, Emmett, Teller (BET) method, combustion analysis, XRD, ToF-SIMS, TEM and impedance spectroscopy has been used to investigate the interaction of gadolinia doped ceria (GDC) with hydrogen sulphide containing reducing atmospheres. It is shown that sulphur is incorporated into the GDC bulk and might lead to phase changes. Additionally, high concentrations of silicon are found on the surface of model composite microelectrodes. Based on these data, a model is proposed to explain the multi-facetted electrochemical degradation behaviour encountered during long term electrochemical measurements. While electrochemical bulk properties of GDC stay largely unaffected, the surface polarisation resistance is dramatically changed, due to silicon segregation and reaction with adsorbed sulphur.