Please use this identifier to cite or link to this item: doi:10.22028/D291-24188
Title: 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
Other Titles: 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
Author(s): Alves, Valéria Almeida
Da Silva, Luís Antônio
Da Silva, Marcelo A. Pereira
Aegerter, Michel A.
Language: (Other)
Year of Publication: 1994
OPUS Source: 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 key words: Pyrolyse
DDC notations: 500 Science
Publikation type: Conference Paper
Abstract: -
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 to this record: urn:nbn:de:bsz:291-scidok-23918
Date of registration: 10-Sep-2009
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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