Hydrogenation of CO_(2) to value-added chemicals has attracted much attention all through the world.In2 O_(3) with cubic bixbyite-type(denoted as c-In2O_(3))is well known for its high CO_(2) hydrogenation activity and...Hydrogenation of CO_(2) to value-added chemicals has attracted much attention all through the world.In2 O_(3) with cubic bixbyite-type(denoted as c-In2O_(3))is well known for its high CO_(2) hydrogenation activity and CH3 OH selectivity at high temperature.However,the other structure of In2O_(3) with rhombohedral corundum-type(denoted as rh-In2O_(3))rarely been investigated as catalyst.Herein,c-In2O_(3) and rh-In2O_(3) were prepared and comparatively studied for CO_(2) hydrogenation.The results indicated that c-In2O_(3) showed higher CO_(2) conversion activity than rh-In2O_(3) due to the impressive reducibility and reactivity.Whereas rh-In2O_(3) had higher CH3 OH selectivity due to weaker CH3 OH and stronger CO adsorption on rhIn2O_(3).Although c-In2O_(3) and rh-In2O_(3) catalysts showed different CO_(2) hydrogenation perfo rmance,in-situ diffuse reflectance infrared Fourier transform spectroscopy showed CO_(2) can be reduced to CO through redox cycling and hydrogenation to CH3 OH through formate path.展开更多
基金the National Natural Science Foundation of China(No.21878116)Natural Science Foundation of Hubei Province(No.2019CFA070)。
文摘Hydrogenation of CO_(2) to value-added chemicals has attracted much attention all through the world.In2 O_(3) with cubic bixbyite-type(denoted as c-In2O_(3))is well known for its high CO_(2) hydrogenation activity and CH3 OH selectivity at high temperature.However,the other structure of In2O_(3) with rhombohedral corundum-type(denoted as rh-In2O_(3))rarely been investigated as catalyst.Herein,c-In2O_(3) and rh-In2O_(3) were prepared and comparatively studied for CO_(2) hydrogenation.The results indicated that c-In2O_(3) showed higher CO_(2) conversion activity than rh-In2O_(3) due to the impressive reducibility and reactivity.Whereas rh-In2O_(3) had higher CH3 OH selectivity due to weaker CH3 OH and stronger CO adsorption on rhIn2O_(3).Although c-In2O_(3) and rh-In2O_(3) catalysts showed different CO_(2) hydrogenation perfo rmance,in-situ diffuse reflectance infrared Fourier transform spectroscopy showed CO_(2) can be reduced to CO through redox cycling and hydrogenation to CH3 OH through formate path.
