Tin oxide surfaces. Part 16.—Infrared study of the adsorption of formic acid, acrylic acid and acrolein on tin(IV) oxide, tin(IV) oxide–silica and tin(IV) oxide–palladium oxide

Abstract

Transmission infrared spectroscopy has been employed to study the surface species formed by adsorption of formic acid, acrolein and acrylic acid on tin(IV) oxide, tin(IV) oxide–silica and tin(IV) oxide–palladium oxide. The behaviour of the three adsorbents is similar on all three oxides. At low temperatures the two organic acids give surface carboxylate plus coordinated acid, which can be removed by evacuation at higher temperatures. Acrolein is adsorbed as a surface acrylate, although surface-coordinated acrolein is observed at lower temperatures.