详细信息

气相中2Sr+和2Ba+催化N2O与CO还原反应的理论研究     被引量:2

Theoretical Study for the Reduction of N_2O with CO Catalyzed by ~2Sr^+ and ~2Ba^+ in the Gas

文献类型:期刊文献

中文题名:气相中2Sr+和2Ba+催化N2O与CO还原反应的理论研究

英文题名:Theoretical Study for the Reduction of N_2O with CO Catalyzed by ~2Sr^+ and ~2Ba^+ in the Gas

作者:刘凤霞[1];张建辉[2];胡敏哲[2];冷艳丽[3];王永成[4]

第一作者:刘凤霞

机构:[1]定西师范高等专科学校生化系,定西743000;[2]兰州资源环境职业技术学院基础部,兰州730021;[3]西北永新化工股份有限公司技术中心,兰州730000;[4]西北师范大学化学化工学院甘肃省高分子材料重点实验室,兰州730070

第一机构:甘肃中医药大学定西校区

年份:2011

卷号:69

期号:2

起止页码:157

中文期刊名:化学学报

外文期刊名:Acta Chimica Sinica

收录:CSTPCD;;Scopus;北大核心:【北大核心2008】;CSCD:【CSCD2011_2012】;

语种:中文

中文关键词:2Sr;2Ba;N2O和CO;反应机理;密度泛函理论(DFT)

外文关键词:2Sr+; 2Ba+; N2O+CO; reaction mechanism; density functional theory(DFT)

摘要:用密度泛函理论DFT-UB3LYP方法,对2Sr+,2Ba+采用相对论校正赝势基组SDD,对C,N,O采用6-311+G(2d)基组,计算研究了气相中碱土金属离子2Sr+,2Ba+催化N2O(X1∑+)+CO(X1∑+)→N2(X1∑+g)+CO2(X1∑+g)反应的微观机理.优化了二重态势能面上各反应物、中间体和过渡态的构型特征,并用频率分析方法和内禀反应坐标方法(IRC)对过渡态进行了验证.2Sr+和2Ba+转化N2O,CO为N2,CO2的循环催化反应的计算所得结论与实验结果相同,两者的反应路径相似,两步进行的主反应都各包括两个反应通道.并通过分析NBO电荷分布对各反应复合物形成时电荷的变化作了相应讨论.
The reaction mechanism of the reaction N2O(1∑+)+CO(1∑+) → N2(1∑+g)+CO2(1∑+g) cata-lyzed by alkaline-earth metal cations 2Sr+ and 2Ba+ have been investigated by using the UB3LYP density functional theory(DFT,UB3LYP) with the relativistic effective core potential(RECP) of basis sets(SDD) for 2Sr+,2Ba+ and the 6-311+G(2d) basis set for C,N and O on doublet energy surfaces.The geometries for reactants,the transition states and the products are completely optimized.All the transition states are verified by the vibrational analysis and the internal reaction coordinate(IRC) calculations.The results show both main reactions process in a two-step manner to products.NBO analysis has been used to discuss the structure of reactant-complexes,our calculated results for the title reactions are in close agreement with ex-perimental observations.

参考文献:

正在载入数据...

版权所有©甘肃中医药大学 重庆维普资讯有限公司 渝B2-20050021-8 
渝公网安备 50019002500408号 违法和不良信息举报中心