Cargando…
The Sulphur Poisoning Behaviour of Gadolinia Doped Ceria Model Systems in Reducing Atmospheres
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...
Autores principales: | , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5509099/ https://www.ncbi.nlm.nih.gov/pubmed/28773771 http://dx.doi.org/10.3390/ma9080649 |
_version_ | 1783249963015208960 |
---|---|
author | Gerstl, Matthias Nenning, Andreas Iskandar, Riza Rojek-Wöckner, Veronika Bram, Martin Hutter, Herbert Opitz, Alexander Karl |
author_facet | Gerstl, Matthias Nenning, Andreas Iskandar, Riza Rojek-Wöckner, Veronika Bram, Martin Hutter, Herbert Opitz, Alexander Karl |
author_sort | Gerstl, Matthias |
collection | PubMed |
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. |
format | Online Article Text |
id | pubmed-5509099 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-55090992017-07-28 The Sulphur Poisoning Behaviour of Gadolinia Doped Ceria Model Systems in Reducing Atmospheres Gerstl, Matthias Nenning, Andreas Iskandar, Riza Rojek-Wöckner, Veronika Bram, Martin Hutter, Herbert Opitz, Alexander Karl Materials (Basel) Article 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. MDPI 2016-08-02 /pmc/articles/PMC5509099/ /pubmed/28773771 http://dx.doi.org/10.3390/ma9080649 Text en © 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Gerstl, Matthias Nenning, Andreas Iskandar, Riza Rojek-Wöckner, Veronika Bram, Martin Hutter, Herbert Opitz, Alexander Karl The Sulphur Poisoning Behaviour of Gadolinia Doped Ceria Model Systems in Reducing Atmospheres |
title | The Sulphur Poisoning Behaviour of Gadolinia Doped Ceria Model Systems in Reducing Atmospheres |
title_full | The Sulphur Poisoning Behaviour of Gadolinia Doped Ceria Model Systems in Reducing Atmospheres |
title_fullStr | The Sulphur Poisoning Behaviour of Gadolinia Doped Ceria Model Systems in Reducing Atmospheres |
title_full_unstemmed | The Sulphur Poisoning Behaviour of Gadolinia Doped Ceria Model Systems in Reducing Atmospheres |
title_short | The Sulphur Poisoning Behaviour of Gadolinia Doped Ceria Model Systems in Reducing Atmospheres |
title_sort | sulphur poisoning behaviour of gadolinia doped ceria model systems in reducing atmospheres |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5509099/ https://www.ncbi.nlm.nih.gov/pubmed/28773771 http://dx.doi.org/10.3390/ma9080649 |
work_keys_str_mv | AT gerstlmatthias thesulphurpoisoningbehaviourofgadoliniadopedceriamodelsystemsinreducingatmospheres AT nenningandreas thesulphurpoisoningbehaviourofgadoliniadopedceriamodelsystemsinreducingatmospheres AT iskandarriza thesulphurpoisoningbehaviourofgadoliniadopedceriamodelsystemsinreducingatmospheres AT rojekwocknerveronika thesulphurpoisoningbehaviourofgadoliniadopedceriamodelsystemsinreducingatmospheres AT brammartin thesulphurpoisoningbehaviourofgadoliniadopedceriamodelsystemsinreducingatmospheres AT hutterherbert thesulphurpoisoningbehaviourofgadoliniadopedceriamodelsystemsinreducingatmospheres AT opitzalexanderkarl thesulphurpoisoningbehaviourofgadoliniadopedceriamodelsystemsinreducingatmospheres AT gerstlmatthias sulphurpoisoningbehaviourofgadoliniadopedceriamodelsystemsinreducingatmospheres AT nenningandreas sulphurpoisoningbehaviourofgadoliniadopedceriamodelsystemsinreducingatmospheres AT iskandarriza sulphurpoisoningbehaviourofgadoliniadopedceriamodelsystemsinreducingatmospheres AT rojekwocknerveronika sulphurpoisoningbehaviourofgadoliniadopedceriamodelsystemsinreducingatmospheres AT brammartin sulphurpoisoningbehaviourofgadoliniadopedceriamodelsystemsinreducingatmospheres AT hutterherbert sulphurpoisoningbehaviourofgadoliniadopedceriamodelsystemsinreducingatmospheres AT opitzalexanderkarl sulphurpoisoningbehaviourofgadoliniadopedceriamodelsystemsinreducingatmospheres |