Abstract
Based on the fact that oxygenated species promotes the oxidative desorption of carbon monoxide adsorbates, a simple methodology is described here to prepare platinum electrodes with oxygen/water ensembles. Platinum fast quenching (thermal shocking) in oxygenated water after flame annealing in an oxygen atmosphere offers features not seen before. We propose the formation of interfacial oxygen/water ensembles as partially soluble species between platinum rows at stepped n x (110) surfaces. Depending on the temperature of quenching and time of cooling, it is possible to almost completely oxidize carbon monoxide adsorbates, via two processes, i.e., chemical oxidation by molecular oxygen and Langmuir-Hinshelwood surface oxidation.
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