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- W2053653485 abstract "The adsorption of glycolcaldehyde from 1 M HClO4 solutions on smooth platinum electrodes was studied by means of galvanostatic pulses at high current densities. The methods used for the graphical calculation of qox and qH are presented and discussed. qox is the charge expended in adsorbate oxidation, as determined by an anodic pulse, and qH is the charge consumed in depositing a hydrogen atom on every available surface site, the charge being determined by a cathodic pulse. At 0.4 V (RHE), glycolaldehyde adsorbs on to the platinum surface following the kinetics of activated adsorption described by the Elovich equation. Up to a coverage of 70%, glycolaldehyde adsorbs on to the electrode, losing three hydrogen atoms and occupying three surface sites. Above this coverage, adsorption proceeds on two surface sites, the organic molecule losing two hydrogen atoms. Adsorption activation energy, increases linearly with increasing surface coverage from 12.80 ±0.05 kcal/mole at ϑ=0 to 15.95±0.05 kcal/mole at ϑ=1. The effect of the electrode potential on the structure of the ad-layer is presented. Adsorption conforms well to the Temkin logarithmic isotherm; nevertheless, no desorption phenomenon can be detected experimentally. Difficulties arising from this apparent contradiction, which is one of the fundamental problems in the study of adsorption of organic substances on platinum, are discussed." @default.
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- W2053653485 title "Kinetics and mechanism of the adsorption of glycolaldehyde on a smooth platinum electrode" @default.
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- W2053653485 doi "https://doi.org/10.1016/s0022-0728(68)80215-3" @default.
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