Kinetics of dissociative adsorption of formic acid on Pt(100), Pt(610), Pt(210) and Pt(110) single-crystal electrodes in perchloric acid solutions |
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Authors: | Sun Shi-Gang Lin Yan Li Nan-Hai Mu Ji-Qian |
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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 Qad of DA produced at a given potential Ead and in a defined time window tad of adsorption has been determined systematically. At fixed tad peaked curves of Qad versus Ead 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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