Infrared study of the adsorption of carbon monoxide, carbon dioxide, acetic acid and acetic anhydride on the surface of anhydrous vanadyl pyrophosphate

Acetic acid and acetic anhydride are dissociatively adsorbed to give acetate anions on the surface of vanadyl pyrophosphate. Undissociated acetic acid molecules ligated to Lewis-acidic surface sites are partially displaced as the surface concentration of acetate anions increased. The products of adsorption of carbon dioxide and carbon monoxide are probably carbonate or bicarbonate species resulting from reaction with surface oxide ions. Adsorbed acetate and carbonate ions are predominantly in the bidentate configuration.