Selective hydrogenation of CO2 to methanol over Ni/In2O3 catalyst  

作　　者：Xinyu Jia Kaihang Sun Jing Wang Chenyang Shen Chang-jun Liu 

机构地区：[1]School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China

出　　处：《Journal of Energy Chemistry》2020年第11期409-415,共7页能源化学（英文版）

基　　金：the National Natural Science Foundation of China(No.21536008 and 21621004)。

摘　　要：An In2O3 supported nickel catalyst has been prepared by wet chemical reduction with sodium borohydride(NaBH4) as a reducing agent for selective hydrogenation of carbon dioxide to methanol. Highly dispersed Ni species with intense Ni-In2O3 interaction and enhanced oxygen vacancies have been achieved.The highly dispersed Ni species serve as the active sites for hydrogen activation and hydrogen spillover.Abundant H adatoms are thereby generated for the oxygen vacancy creation on the In2O3 surface. The enhanced surface oxygen vacancies further lead to improved CO2 conversion. As a result, an effective synergy between the active Ni sites and surface oxygen vacancies on In2O3 causes a superior catalytic performance for CO2 hydrogenation with high methanol selectivity. Carbon monoxide is the only by product detected. The formation of methane can be ignored. When the reaction temperature is lower than 225 ℃,the selectivity of methanol is 100%. It is higher than 64% at the temperature range between 225 ℃ and 275 ℃. The methanol selectivity is still higher than 54% at 300 ℃ with a CO2 conversion of 18.47% and a methanol yield of 0.55 gMeOHg-1cath-1(at 5 MPa). The activity of Ni/In2O3 is higher than most of the reported In2O3-based catalysts.

关 键 词：METHANOL CO2 hydrogenation Indium oxide Ni/In2O3 Oxygen vacancy 

分 类 号：TQ426[化学工程] TQ223.121