First-principles Study of NO Oxidation Kinetics on Low Index LaCoO3 Perovskite Surfaces

摘要

Diesel engines have aroused great interests in recent years due to their high fuel efficiencies and low green-house gas emissions. However, the lean burn exhaust which contains considerable amount of nitrogen oxides (NO_x) poses great threat to human health and environment. A higher concentration of NO2 in the exhaust stream proves to be beneficial for the catalytic process of removing NO_x, driving a considerable interest in the scientific community in search of catalysts for efficiently oxidizing NO into NO2 in place of Pt-based catalysts.