首页|CO2 hydrogenation to methanol over the copper promoted In2O3 catalyst
CO2 hydrogenation to methanol over the copper promoted In2O3 catalyst
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The metal promoted In2O3 catalysts for CO2 hydrogenation to methanol have attracted wide attention because of their high activity with high methanol selectivity.However,there was still no experimental confirmation if copper could be a good promoter for In2O3.Herein,the Cu promoted In2O3 catalyst was prepared using a deposition-precipitation method.Such prepared Cu/In2O3 catalyst shows significantly higher CO2 conversion and space time yield(STY)of methanol,compared to the un-promoted In2O3 cat-alyst.The loading of Cu facilitates the activation of both H2 and CO2 with the interface between the Cu cluster and defective In2O3 as the active site.The Cu/In2O3 catalyst takes the CO hydrogenation pathway for methanol synthesis from CO2 hydrogenation.It exhibits a unique size effect on the CO adsorption.At temperatures below 250 ℃,CO adsorption on Cu/In2O3 is stronger than that on In2O3,causing higher methanol selectivity.With increasing temperatures,the Cu catalyst aggregates,which leads to the forma-tion of weak CO adsorption site and causes a decrease in the methanol selectivity.Compared with other metal promoted In2O3 catalysts,it can be concluded that the catalyst with stronger CO adsorption pos-sesses higher methanol selectivity.
CO2 hydrogenationMethanolCuIn2O3COSelectivityDFT
Rui Zou、Chenyang Shen、Kaihang Sun、Xinbin Ma、Zhuoshi Li、Maoshuai Li、Chang-Jun Liu
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School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China
Collaborative Innovation Center of Chemical Science & Engineering,Tianjin University,Tianjin 300072,China
National Natural Science Foundation of ChinaFundamental Research Funds for the Central Universities of China
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