Application and research progress of CeO2 support in CO2 hydrogenation to methanol
The urgency of addressing the greenhouse effect produced by CO2 emissions is growing due to the economy's rapid development.Reducing CO2 emissions and slowing down global warming can be accomplished by reacting CO2 with green hydrogen to produce value-added chemical compounds like methanol.Recently,CeO2-supported metal catalysts for CO2 hydrogenation to methanol have received extensive attentions.In this review,the importance of CeO2 surface oxygen vacancy,basic sites,Ce3+/Ce4+reversible redox ability,and unique geometric morphology were highlighted in the processes of CO2/H2 adsorption and activation and methanol formation.Moreover,the catalytic activities between CeO2 and ZrO2,ZnO and composite metal oxides supports were compared.Finally,the shortcomings and challenges in identifying active key intermediates,compromising between CO2 conversion and methanol selectivity,and improving the catalytic activity and stability of CeO2-based catalysts were highlighted.This work could provide useful advises for further design of CO2 hydrogenation to methanol catalysts.
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