Co3InC0.75-In2O3 composite construction and its synergetic hydrogenation catalysis of CO2 to methanol

The efficient catalytic hydrogenation of CO 2 to methanol is a promising route for CO 2 emission mitigation and utilization. Recently, the Co-In based materials as one of the excellent alternative catalysts for CO 2 hydrogenation to methanol have received intense attention. Herein, we developed new and efficient Co-In based catalysts (the composite of Co 3 InC 0.75 and In 2 O 3 ) by Prussian Blue analogues (PBA) pyrolysis . And a series of Co 3 InC 0.75 -In 2 O 3 composites with tunable proportion of Co 3 InC 0.75 and In 2 O 3 has been prepared. The experimental results demonstrate the Co 3 InC 0.75 -In 2 O 3 catalysts have high catalytic CO 2 hydrogenation performance into methanol, reaching a methanol yield up to 0.62 g MeOH g cat −1 h −1 at 300 °C, 5 MPa, 24000 cm 3 STP g cat −1 h −1 , and H 2 /CO 2 = 3:1, the high reaction stability and air resistance. The synergetic effects between Co 3 InC 0.75 and In 2 O 3 for the enhanced methanol production were confirmed by a series of characterizations, and a positive correlation between methanol production activity and the fraction of Co 3 InC 0.75 /In 2 O 3 was well established.