Research on manganese oxide catalysts surface pretreated with non-thermal plasma for NO catalytic oxidation capacity enhancement

► Non-thermal plasma surface treatment made MnOx catalysts exhibit high NO catalytic activity. ► MnOx/2.9 catalyst yielded 79% NO conversion at 125 °C. ► Treatment SIE has significant influence on NO catalytic activity of catalysts. ► Change of functional groups during NTPST improved the catalytic activity.