Ternary Ni−Co−Fe exsolved nanoparticles/perovskite system for energy applications: Nanostructure characterization and electrochemical activity
The exsolution of Ni−Co−Fe from a Sr0.93(Ti0.3Fe0.56Ni0.07Co0.07)O3−δ perovskite (STFNC) is explored as a strategy to produce electrochemically active electrodes for symmetric-SOFC (S-SOFC). It was found that a nanostructured NiCoFe ternary alloy phase, with approximately equal amounts of each metal...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/146294 |
| Acceso en línea: | http://hdl.handle.net/11336/146294 |
| Access Level: | acceso abierto |
| Palabra clave: | EXSOLUTION PEROVSKITE SYMMETRIC-SOFC TERNARY ALLOY https://purl.org/becyt/ford/2.5 https://purl.org/becyt/ford/2 |
| Sumario: | The exsolution of Ni−Co−Fe from a Sr0.93(Ti0.3Fe0.56Ni0.07Co0.07)O3−δ perovskite (STFNC) is explored as a strategy to produce electrochemically active electrodes for symmetric-SOFC (S-SOFC). It was found that a nanostructured NiCoFe ternary alloy phase, with approximately equal amounts of each metal, can be formed by this method. The STFNC electrode is studied via electrochemical impedance spectroscopy, showing a really interesting potential as S-SOFC electrode: the anode polarization resistance was 1.12 Ω·cm2 in a wet 10%H2 atmosphere at 700 °C (exsolving in situ the NiCoFe phase), and the cathode polarization resistance at 700 °C in air was 0.054 and 0.042 Ω·cm2, before and after exsolution, respectively. |
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