The role of carbon supports in platinum catalyzed hydrogenation/ dehydrogenation model reactions

Abstract

giving a higher turnover frequency, the propane dehydrogenation reaction over Pt supported on carbon black was less susceptible to deactivation in experiments without co-fed hydrogen, indicating that the carbon black support either reduces the rate of coke formation or the toxicity of the coke formed. This high conversion observed for Pt supported on carbon black when used for propane dehydrogenation has not been observed when structure insensitive ethene hydrogenation was used as a model reaction, confirming that the high conversion and longer lifetime compared to other tested catalysts was not caused by a higher dispersion. It is suggested that other effects, such as metal-support interaction, can play an important role in influencing the properties of carbonsupported catalysts.