Electrical Conductivity Studies of Ethanol Oxidation over Zinc Oxide

[摘要] Changes in the electrical conductivity of gallium doped zinc oxide during the dehydrogenative oxidation of ethanol between 250 and 350¡É have been studied. Both dehydrogenation and dehydration of ethanol takes place on ZnO. At 300¡É and above formation of CO2 was observed accompanied by an increase in the electrical conductivity. This seems to be due to oxidation of CO formed by the decomposition of acetaldehyde. Addition of oxygen to ethanol increases the amount of acetaldehyde formed, while no change is observed in ethylene formation. It may be that oxygen which is present primarily as O- provides a favorable site for the adsorption of ethanol and for subsequent hydrogen substraction.

[学科分类] 化学（综合）