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Experimental measurements designed to test a specific model of the Pt-Teflon bonded electrode are described. The model assumes that the catalyst agglomerates are filled with electrolyte and that the Teflon binder creates hydrophobic channels, providing effective gas penetration. The electrochemical measurements of surface area and distribution of adsorbed charge formed by reduction of CO2 or oxidation of C3Hs were carried out for a series of electrodes of different structure. Comparisons are made with BET surface area and pore volume distribution. The results presented are consistent with the proposed model.

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