Plasma catalytic CO2 hydrogenation to methanol: The interaction between MnOx and ZrO2

Abstract Plasma catalytic CO 2 hydrogenation to methanol over MnO x /ZrO 2 catalyst was investigated in this work. A boosted methanol yield of 4.6 mg/h was obtained over MnO x /ZrO 2 catalyst, while it was only 0.0 and 0.7 mg/h for ZrO 2 and MnO x catalyst, respectively. The interaction between MnO x and ZrO 2 was responsible for the enhanced methanol yield. It resulted in sufficient oxygen vacancy. The in situ DRIFT spectra was conducted to reveal the plasma catalytic CO 2 hydrogenation to methanol reaction mechanism and the key intermediates of HCOO and CH 3 O species were determined. The sufficient oxygen vacancy promoted the formation of the key intermediates, especially the CH 3 O species.