Influence of oxygen and promoting effect of barium on the reduction of NO by ethanol on Pd/ZrO2 catalyst

A new insight into the effects of barium addition on Pd-only catalysts: Pd-support interface and CO+NO reaction pathway

“…Considerable efforts have focused on improving the de-NO x catalytic activity of the Pd-only catalysts by componential modification. Alkaline earth metal oxide including barium oxide is one of the additives practically used in automotive catalysts [6,7]. Kobayashi et al [6] observed that the presence of Ba species in the palladium catalysts increased the conversion of CO, NO x and hydrocarbons.…”