CeO_2-LnO_(1.5)固溶体的表征及其甲烷催化燃烧性能
Characterization of CeO_2-LnO_(1.5) Solid Solutions and Their Behavior in Catalytic Combustion of Methane
Date
1998Collections
- 化学化工－已发表论文 [14235]
Abstract
向CEO2中引入ln3+离子后形成的CEO2-lnO1.5（ln=lA，nd，SM，gd）固溶体（n（CE）：n（ln）=1：1）是一种无贵金属的新型高效甲烷燃烧催化剂.比表面、Xrd、rAMAn、TEM等分析证实，这类固溶体具有部分畸变的萤石结构，ln3+进入晶格后诱发的结构变化使得团溶体的表面和本体能同时参与氧化还原反应.实验表明，该固态溶液体系是甲烷催化燃烧的良好催化剂. A series of ceria-lanthanide oxide CeO2-LnO1.5 (Ln=La, Nd, Sm, Gd) solu solutions were prepared in n(Ce): n(Ln) ratio of 1: 1 by coprecipitation method.Their partlydistorted Fluorite structures were revealed by speciFic surFace, XRD, Raman spectrum andTEM results.The structure change of the solid solution due to the entering of Ln3+ ions intoCeO2 lattice could make both the surFace and bulk of the solid solution participate in the redox reaction simultaneously.The solid solutions were Found to be highly active For catalyticcombustion of methane.