摘要
用XRD技术表征了LnAlO_3的体相结构和晶体的畸变度,用TPD技术考察了LnAlO_3的吸附氧行为。表征结果与催化性能关联表明,LnAlO_3的畸变度大、缺陷多、吸附氧的能力强,其催化性能就好;吸附的原子氧是活化甲烷生成C_2的氧种。
The bulk Structure and deformation of the perovskite oxides*LnAlO3 were characterized by using XRD and the behavior of oxygen adsorption on these catalysts was investigated by using TPD. The corelation between the crystalline structure and the catalytic properties indicates that a high degree deformation of structure and a large amount of surface defect may cause a strong ability of oxygen adsorption, as a result, leading to a nice catalytic activation. An as-sumeption was made that the adsorbed oxygen atom is the species for the activation of methane.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第1期111-114,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
稀土
复合氧化物
LnAlO3型
催化性
Perovskite oxide, Lattice deformation, Oxidation coupling of methane
