Contribution of components in Ce–Ti–Cr–Ox catalysts for selective propane-combustion in the presence of CO

Gas-phase combustion of hydrocarbons and CO in exhaust gases are normally performed competitively by supported noble metals. With the help of high-throughput technologies complex mixed oxides, such as the amorphous porous Ce20Ti50Cr30Ox have been discovered, which selectively convert propane in the presence of excess of carbon monoxide. These findings are of fundamental importance for heterogeneous catalysis and may have implications on the future development of novel exhaust gas catalysts. In this study the effect of the various elements of the mixed oxide catalysts on activity and selectivity has been investigated and interpreted. The results of attempts to further improve the catalysts by additional doping are presented.