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Microstructural characteristics and electrochemical behavior of Co3O4 sintered electrodes

Authors
  • Silva, G. C.
  • Codaro, E.
  • Paiva Santos, C. O.
  • Fugivara, Cecilio Sadao
  • Sumodjo, P. T A
  • Benedetti, Assis Vicente
Publication Date
Jan 01, 2001
Identifiers
DOI: 10.4028/www.scientific.net/KEM.189-191.388
OAI: oai:acervodigital.unesp.br:11449/66437
Source
Acervo Digital da Unesp
Keywords
Language
English
License
White
External links

Abstract

Co3O4 can be used as electrocatalyst for oxygen evolution reaction. The macro and microstructure of the oxide, obtained by compacting and sintering lithium-doped Co3O4 powder in atmosphere of dry air and in conditions of controlled temperature and time was analyzed by metallographic techniques. The porous material was characterized by XRD, SEM and EDS combined techniques. For working temperatures up to 1200°C, the pellet was consituted of particles with varying sizes over a wide range of particle size and, at higher temperatures CoO is formed and polymorphic transformation was observed. The materials were also characterized electrochemically in alkaline media by open circuit potential and potentiodynamic I/E measurements. The results were compared to those previously prepared by others by thermal deposition.

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