Abstract
Adsorption of water from DMSO solution on platinum was studied by the use of the direct tritium radioelectrochemical method. It was found that adsorption occurs in the second ad-layer of the Pt-DMSO interface with the maximum surface concentration 1.1×1015 mol cm−2. This value was attributed to the monolayer of the adsorbate. Formally, Temkin conditions were found. No potential dependence of HTO adsorption was observed. Some remarks on the double-layer structure of the Pt electrode in DMSO are included. The potential dependence of DMSO adsorption previously determined with the 35S compound has now been confirmed by using T-labelled DMSO. This is considered as evidence that no H-T isotope exchange between chemisorbed DMSO and water from the solution phase occurs.
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