Abstract

The heats of chemisorption of methanol and 1-propanol on zinc oxide were measured by the heat-of-immersion method, in which different amounts of preadsorbed alcohol were displaced by water which formed surface hydroxyls on the zinc oxide The differential heat of alcohol decreased with increasing alcohol coverage; this was apparently a result of interaction (hydrogen bonding) at low coverage of surface hydroxyls formed from dissociative alcohol adsorption and hydroxyls already on the surface. The differal heat of propanol chemisorption was higher than that of methanol chemisorption, probably as a result of a higher inductive effect for the longer alkyl group.

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