Engineering the surface of perovskite La_(0.5)Sr_(0.5)MnO_3 for catalytic activity of CO oxidation

摘要

A simple treatment of La_(0.5)Sr_(0.5)MnO_3 with diluted HNO_3 creates more B-sites (rich) on the terminated perovskite surface and improves its catalytic activity toward CO oxidation, and the perovskite catalyst possesses a higher ratio of Mn~(4+)/Mn~(3+) and thus enhances the O_2 adsorption capability, favourable for CO oxidation and catalytic activity.