Abstract
The kinetics of dissociative adsorption of HCOOH on Pt(100), Pt(610), Pt(210) and Pt(110) single-crystal electrodes has been investigated. The oxidation of dissociative adsorbate (DA) derived from the dissociative adsorption of HCOOH was used as a probe reaction together with the potential-step technique of short time windows. The quantity Q ad of DA produced at a given potential E ad and in a defined time window t ad of adsorption has been determined systematically. At fixed t ad peaked curves of Q ad versus E ad in the potential range between −0.25 and 0.25 V/SCE have been obtained on all four electrodes. The maximum rate of dissociative adsorption of HCOOH decreases in the order Pt(110) ⪢ Pt(210) ⪢ Pt(610) ⪢ Pt(100).
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