摘要
扼要叙述了钙钛矿氧化物 (ABO3)在净化汽车尾气催化剂中的应用 ,包括结构特性、缺陷化学、表面和晶内催化过程、铂族金属的作用和 2个实例。强调了利用A和B位阳离子的可替代性对催化剂性能进行修整 ;选择B位上的阳离子和组成比 ,使之有适当对称能级的轨道 。
The application of perovskite oxides to auto-exhaust emission control catalysts was reviewed in present paper.It involved material structure,defect chemistry,suprafacial and intrafacial catalytic processes,performance of platinum group metals.Two examples were given.The review emphasized that substitutional properties of A-and B-site cations were used to tailor the performance of catalysts,certain cations and their ratios of composition in B-site were selected having the orbital with proper symmetric energy level to improve the selectivity of NO reduction and performance of three-way catalysts.
出处
《贵金属》
CAS
CSCD
2001年第2期61-66,42,共7页
Precious Metals
基金
云南省重点基金项目 (97E0 0 8Z)
关键词
钙钛矿型氧化物
汽车
铂族金属
催化剂
尾气净化
Perovskite oxide
Purification
Auto-exhaust
Platinum group metals
Catalyst
