Abstract
Teflon-bonded porous electrodes have been prepared for the study of the upd metal effect on the electrocatalysis of formic acid oxidation. The influence of upd lead on finely divided platinum with porous carbon as substrate was tested in fuel cell anodes for the oxidation of formic acid in 1 M HClO 4 electrolyte. In order to investigate the increase in activity through the use of upd lead, the co-adsorption of lead and a strongly adsorbed intermediate was followed by a flux cell technique. From this study it follows that the third-body effect is of minor importance. Obviously upd lead itself catalyses the direct oxidation to CO 2.
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