Comparison the Catalytic Oxidation of Ethanol on PdO/Ce_(0.75)Zr_(0.25)O_2, PdO/CeO_2 and PdO/ZrO_2 Catalysts Studied by TPSR, TPD and TPR Techniques

摘要

Ethanol is a promising liquid fuel for direct alcohol fuel cell (DAFC) systems because of their low cost, easy storage and transportation and high-energy content. Thus, ethanol oxidation can be taken as a representative model system for the electrochemical reaction of an organic compound containing two or more C-atoms. There have many excellent catalysts used in DAFC but still some shortcomings such as low activity and high selectivity for intermediates, which will poison and decrease the activity of catalyst. So the work of finding a novel catalyst that has much higher activity to deep oxidize ethanol CO_2 is quite important. Through the study of direct oxidation of ethanol can provide a useful help for understanding the catalytic oxidation of ethanol and having more information on the reaction mechanism of ethanol oxidation and to find a catalyst target for application in DAFC.