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Surface Chemistry of Oxides and Electrocatalysis

Sergio Trasatti ; Department of Physical Chemistry and Electrochemistry, University of Milan, Via Venezian 21, 20133 Milan, Italy

Puni tekst: engleski pdf 15.058 Kb

str. 313-329

preuzimanja: 380



After an introductory description of the moment acquired by some oxide electrodes in the electrochemical technology, the procedure for their preparation and the physicochemical and electrochemical characterizations are described emphasizing the interdisciplinary character of the research in this field. The importance of -separating geometrical from electronic parameters for a proper understanding of the factors governing the electro- catalytic activity is stressed. Arguments along these lines lead to the association of electrocatalysis with surface acid-base dissociation concepts. A parallel analysis of the behaviour of the point of zero charge and of the electrocatalytic activity for the anodic evolution of oxygen shows that the former property can be used as a diagnostic, intensive parameter for a relative evaluation of the electrocatalytic activity of a set of oxide electrodes.
Results for RuOx, IrOx, C03O4 and NiCo2C>4 are discussed.

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