石油化工2017，Vol.46Issue(7)：857-861,5.DOI:10.3969/j.issn.1000-8144.2017.07.004
焙烧温度对铈锆固溶体性能的影响
Effect of calcination temperature on the performance of ceria-zirconia solid solution
金银龙 1王国清 1张利军 1王育 1杨沙沙1
作者信息
- 1. 中国石化北京化工研究院,北京100013
- 折叠
摘要
Abstract
Ce0.67Zr0.33O2 solid solution was prepared by oxidation-coprecipitation method and calcined at different temperatures.The structures properties,surface areas,oxygen storage capacities,reducibility and surface atom ratio of ceria-zirconia solid solution were characterized by XRD,TG-DSC-MS,BET,XPS,Raman spectra,H2-TPR.The results showed that the samples calcined at 550 ℃ can bum out the nitrates species in catalyst precursors and form ceria-zirconia solid solution.The samples calcined at 550-900 ℃ had good thermal stability.Due to the increase of calcination temperature,specific surface area turned smaller while grain size became higher,resulting in the decrease of oxygen vacancy and reduction capacity.The partly sintering of solid solution at high temperature rendered the Ce3+ relative amount and oxygen storage capacity reduced.关键词
氧化共沉淀法/铈锆固溶体/储氧量/焙烧Key words
oxidation-coprecipitation method/ceria-zirconia solid solution/oxygen storage capacity/calcination分类
化学化工引用本文复制引用
金银龙,王国清,张利军,王育,杨沙沙..焙烧温度对铈锆固溶体性能的影响[J].石油化工,2017,46(7):857-861,5.
