Using the Interaction between Copper and Manganese to Stabilize Copper Single-atom for CO Oxidation.

The interaction between Cu and Mn has been used to immobilize the Cu single-atom on MnO2 surface by redox-driven hydrolysis. Comprehensive structure and property characterizations demonstrate that the existence of an Cu-Mn interaction on the catalyst surface can effectively restrain the aggregation of Cu single atoms and improve carbon monoxide (CO) oxidation activity. The interaction of forming the Cu-O-Mn entity is beneficial for CO catalytic activity as the migration of reactive oxygen species and the coordination effect of active centers accelerate the reaction. In particular, 3%-Cu-1/MnO2 shows an oxygen storage capacity (OSC) value (342.75 mu mol/g) more than ten times that of pure MnO2 (27.79 mu mol/g) and has high CO catalytic activity (T-90%=80 degrees C), it can maintain CO conversion of 95 % after 15 cycles. This work offers a reliable method for synthesizing Cu single-atom catalysts and deepens understanding of the interaction effect between single transition metal atoms and supports that can improve the catalytic activity of CO oxidation.

Automated summary

The interaction between Cu and Mn on the catalyst surface can effectively immobilize Cu single atoms, restrain their aggregation, and improve CO oxidation activity. The formation of the Cu-O-Mn entity benefits CO catalytic activity by accelerating reactions through the migration of reactive oxygen species and coordination effect of active centers.