BiMnO_3钙钛石上低温NH_3选择性催化还原NO  

BiMnO_3 Perovskite Catalyst for Selective Catalytic Reduction of NO with NH_3 at Low Temperature

作　　者：张一波[1,2] 王德强[1] 王静[1] 陈去非[1] 张震东[1] 潘喜强[1] 苗珍珍[1] 张彬[1] 武志坚[1] 杨向光[1] 

机构地区：[1]中国科学院长春应用化学研究所稀土资源利用国家重点实验室,吉林长春130022 [2]中国科学院研究生院,北京100049

出　　处：《催化学报》2012年第9期1448-1454,共7页

基　　金：国家自然科学基金(21177120);国家高技术研究发展计划(863计划;2011AA03A406)~~

摘　　要：首次将钙钛石BiMnO3用于低温条件下NH3选择性催化还原NO反应中.结果表明,该催化剂在100～240oC范围内表现出较好的催化活性.实验和理论计算显示,相对于LaMnO3,BiMnO3优异的低温催化活性归因于其较强的Lewis酸性和较多的表面吸附氧物种.此外,BiMnO3还具有较好的抗水、抗硫性能.A perovskite was used for selective catalytic reduction of NO with NH3 （NH3-SCR） at low temperature in the presence of excess oxygen. The BiMnO3 perovskite catalyst showed high activity in NH3-SCR at 100-240℃. Experiment and DFT calculation showed that more Lewis acid sites and a high concentration of surface oxygen on BiMnO3 as compared with LaMnO3 were responsible for its better performance. In addition, BiMnO3 was also resistant to water vapor and a mixture of H2O and SO2.

关 键 词：钙钛石 锰酸铋 酸性 选择催化还原 低温 

分 类 号：O643.36[理学—物理化学]