Synthesis and characterization of Perovskite based catalysts for automotive CO oxidation

Abstract

Air pollution generated from automobiles has been a burning issue because of poisonous gases like carbon monoxide (CO), unburned hydrocarbons (HC), nitrogen oxides (NOx) and particulate matters (PM) emitted by automobiles. These pollutants create adverse effect on human health, air quality and the environment that lead in stringent regulations in the form of emission norms. To control tail pipe emission from two/four wheelers, three way catalytic converter based on Pt-Pd-Rh have been used successfully however it has some limitations. Perovskite oxides (with general formula ABO3 where A and B are rare earth, alkaline earth, alkali metal and transition metal cations respectively) can be alternative catalytic material to this noble metals based three way catalytic converter for automotive CO oxidation because of their low cost, thermal stability at high temperature, high mechanical stability and excellent redox properties. newline