INFRARED SPECTRA OF GASES CHEMISORBED ON ZINC OXIDE: I. CO AND CO₂

Abstract

The infrared spectra of CO and CO? adsorbed on zinc oxide have been observed in the regloll 2-9 p. 'I'he results show that CO does not exist a s such on the surface a t 155' C, but is immediately oxidized to CO?. There is no evidence for carbonate formation in the adsorption of CO, the spectra corresponding to structures of the carboxylate type. A band is observed a t 2174 cm-' for CO a t 25' C which nlay correspond to dipole interaction or to a n oxidation step. INTRODUCTIOK

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