| Publikationstyp: | Konferenz: Paper |
| Art der Begutachtung: | Peer review (Abstract) |
| Titel: | Exsolution and integration of nanosized SMART catalysts for next generation SOFC anodes |
| Autor/-in: | Burnat, Dariusz Holzer, Lorenz Franken, Tanja Mai, Andreas Heel, Andre |
| Tagungsband: | Proceedings of 13th European SOFC & SOE Forum 2018 |
| Seite(n): | 248 |
| Seiten bis: | 257 |
| Angaben zur Konferenz: | 13th European SOFC & SOE Forum 2018, Lucerne, 3-6 July 2018 |
| Erscheinungsdatum: | 2018 |
| ISBN: | 978-3-905592-23-8 |
| Sprache: | Englisch |
| Schlagwörter: | Anodes; Perovskite; Smart Material; SOFC |
| Fachgebiet (DDC): | 621.3: Elektro-, Kommunikations-, Steuerungs- und Regelungstechnik |
| Zusammenfassung: | La-doped strontium titanate (LST) materials are widely recognized among other alternative anodes as good electronic conductors with high tolerance to redox cycles, but with insufficient catalytic activity. However, doping of LST with quasi-stable metal ions (e.g. Ni, Co) allows a selective exsolution of these metals from the bulk onto the materials surface and thus increasing the catalytic activity. Previously we have demonstrated our SMART material concept with selfregeneration effect, in which nano-sized nickel catalyst is repeatedly exsolved from and incorporated back into the La0.2.Sr0.7Ti0.95Ni0.05O3-d (LSTN) perovskite host structure. Nickel nanoparticles are exsolved from LST at SOFC anode conditions and nickel is reincorporated at high pO2, during a redox cycle. This turns redox cycles - the weakness of conventional Ni/YSZ anodes - into an advantage and regenerates the material. The authors present recent advances of the SMART material catalysts based on LSTN. We demonstrate that upon harsh heat treatment (T = 1200°C) depending on the location and site at least three types of nickel particles being generated LSTN: a) fine particles with presumably high catalytic activity (dp < 15 nm) b) large particles located on grain facets up to 150 nm c) large particles located on grain boundaries above 100 nm. Also at 1200°C a significant growth of nickel crystallites can be observed, which is however reversed by redox cycling at T = 900°C. Even large particles (dp >150 nm), generated on the facets of grains are reversibly incorporated into the LSTN host matrix (Fig. 1), while those large ones located at the grain boundaries underwent an oxidation to NiO. Temperature programmed reduction has proven unchanged REDOX reversibility of LSTN materials upon 9 redox cycles a temperature of 900°C, suggesting catalytic reversibility. |
| Weitere Angaben: | B1104 |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/8935 |
| Volltext Version: | Publizierte Version |
| Lizenz (gemäss Verlagsvertrag): | Lizenz gemäss Verlagsvertrag |
| Departement: | School of Engineering |
| Organisationseinheit: | Institute of Computational Physics (ICP) Institute of Materials and Process Engineering (IMPE) |
| Enthalten in den Sammlungen: | Publikationen School of Engineering |
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Burnat, D., Holzer, L., Franken, T., Mai, A., & Heel, A. (2018). Exsolution and integration of nanosized SMART catalysts for next generation SOFC anodes [Conference paper]. Proceedings of 13th European SOFC & SOE Forum 2018, 248–257.
Burnat, D. et al. (2018) ‘Exsolution and integration of nanosized SMART catalysts for next generation SOFC anodes’, in Proceedings of 13th European SOFC & SOE Forum 2018, pp. 248–257.
D. Burnat, L. Holzer, T. Franken, A. Mai, and A. Heel, “Exsolution and integration of nanosized SMART catalysts for next generation SOFC anodes,” in Proceedings of 13th European SOFC & SOE Forum 2018, 2018, pp. 248–257.
BURNAT, Dariusz, Lorenz HOLZER, Tanja FRANKEN, Andreas MAI und Andre HEEL, 2018. Exsolution and integration of nanosized SMART catalysts for next generation SOFC anodes. In: Proceedings of 13th European SOFC & SOE Forum 2018. Conference paper. 2018. S. 248–257. ISBN 978-3-905592-23-8
Burnat, Dariusz, Lorenz Holzer, Tanja Franken, Andreas Mai, and Andre Heel. 2018. “Exsolution and Integration of Nanosized SMART Catalysts for next Generation SOFC Anodes.” Conference paper. In Proceedings of 13th European SOFC & SOE Forum 2018, 248–57.
Burnat, Dariusz, et al. “Exsolution and Integration of Nanosized SMART Catalysts for next Generation SOFC Anodes.” Proceedings of 13th European SOFC & SOE Forum 2018, 2018, pp. 248–57.
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