Abstract
An apparatus for the study of carbon dioxide adsorption (labelled with 14C) on platinum electrodes from 0.5 M H 2SO 4 solution has been developed. The working electrode was prepared by the electroplating of gold, deposited onto a mylar foil. A plastic scintillator was placed under the electrode to achieve a high counting efficiency (∼ 15 per cent). Owing to the construction of the apparatus the study of adsorption dependence on temperature was made possible. It has been shown that the CO 2 adsorption on platinum (in the potential range 0–0·35 eV) is a result of interaction with H ads. The surface concentration of “reduced CO 2” on platinum, and the charge needed for its oxidation reveal that the adsorbed species is a COOH radical.
Published Version
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