Analyse de la cinetique des reactions aux electrodes poreuses a gaz par les methodes transitoires

Abstract

By simulating a monotubular electrode with triple contacts by a finite transmission line of type RC, equations enabling the prediction of its response to a galvanostatic or tensiostatic impulse, may be obtained. The validity of these equations has been verified for lines of known elements and electrode models of known characteristics. In the second part of this work, the theory is extended to real porous electrodes on the basis of the hypothesis that the latter can be considered as composed of units having as model the monotubular electrode defined previously. As a result, the analysis of the behaviour of a porous electrode under impulse conditions enables its texture to be studied and the parameters determined. These conclusions applied to a study of commercial electrodes reveal the essential characteristics of the electrode in action and, consequently, define the conditions that should improve their performance.