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Titel: Estudo comparativo por microscopia eletrônica de varredura da superfície de eletrodos de composição Ir0,3Ti(0,7-x)CexO2 antes e após serem submetidos às reações de oxigénio e cloro
Sonstige Titel: Scanning electron microscopy comparative study of the surface of Ir0.3Ti(0.7-x)CexO2 ceramics electrodes before and after submission to oxygen and chlorine evolution reactions
Verfasser: Alves, Valéria Almeida
Da Silva, Luís Antônio
Da Silva, Marcelo A. Pereira
Aegerter, Michel A.
Sprache: Sonstige
Erscheinungsjahr: 1994
Quelle: Anais / 38° Congresso Brasileiro de Cerâmica; 2° Encontro de Mineradores e Consumidores : [18 a 21 de junho de 1994, Blumenau, SC] / Associação Brasileira de Cerâmica. - Vol. 3. - São Paulo, SP : Associação Brasileira de Cerâmica, 1994, S. 1371-1375
SWD-Schlagwörter: Pyrolyse
Sauerstoff
Keramik
Oxide
Anode
DDC-Sachgruppe: 500 Naturwissenschaften
Dokumentart : InProceedings (Aufsatz / Paper einer Konferenz etc.)
Kurzfassung: -
Ceramic oxide electrodes with nominal composition Ir0.3Ti(0.7-x)CexO2 (0≤x≤0.7) present a large variety of technological applications, especially in the electrochemical industry. They were prepared by thermal decomposition (450°C) of the precursors chlorides. A 2µm thick oxide layer was applied by brush on Ti supports (10x10x0.15mm). The morphological properties of these anodes are strongly influenced by the preparation process. In this work, the surface morphology of these electrodes has been determined by Scanning Electron Microscopy as a function of the composition, in fresh electrodes as well as after submission to high currents densities [~50mAcm-2), during oxygen and chlorine evolution reactions. It was observed that CeO2 provokes significant changes on the films morphology, increasing their surface area. This component provide a satisfactory mechanical stability to the electrodes, since after the oxygen and chlorine evolution reactions the films remained unaltered.
Link zu diesem Datensatz: urn:nbn:de:bsz:291-scidok-23918
hdl:20.500.11880/24244
http://dx.doi.org/10.22028/D291-24188
SciDok-Publikation: 10-Sep-2009
Fakultät: Sonstige Einrichtungen
Fachrichtung: SE - INM Leibniz-Institut für Neue Materialien
Fakultät / Institution:INM
SE - Sonstige Einrichtungen

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