中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Size-dependent oxygen storage ability of nano-sized ceria

文献类型:期刊论文

作者Sun CT ; Xue DF
刊名physical chemistry chemical physics
出版日期2013
卷号15期号:34页码:14414-14419
关键词ENHANCED THERMAL-STABILITY ZIRCONIA SOLID-SOLUTIONS CEO2 NANOPARTICLES CAPACITY DETERMINES ADSORPTION
ISSN号1463-9076
通讯作者xue df
中文摘要we thermodynamically studied the size-dependent oxygen storage ability of nano-sized ceria by tracing the surface ce/o ratio of octahedral particles with different diameters, from the viewpoint of lattice ce and o in a ceo2 crystallographic structure. the high surface ce/o ratio with small scale particle size has more excess surface ce4+ ions, which allows ceria to have an increasing oxygen storage ability in a crystalline lattice. for the perfect octahedron growth shape of ceria, the nonstoichiometric surfaces can produce excess ce4+ ions, ce4+ ions can be stabilized by bonding with lattice oxygen, leading to an enhanced oxygen storage ability of ceria. with the increasing particle size, the surface ce/o ratio approaches to 0.5 owing to the decreased contributions of atoms located at the edges and corners. when the octahedron diameter d = 0.55 nm, the surface ce/o ratio can reach 0.75. when d = 7.58 nm, the surface ce/o ratio decreases down to 0.51. if d >= 14.61 nm, the surface ce/o ratios are equal to 0.5. the present study deepens the insight of the size-dependent oxygen storage ability of nano-sized ceria, focusing on the size-dependent excess ce4+ on nonstoichiometric surfaces of ceria in thermodynamics.
收录类别SCI收录期刊论文
语种英语
WOS记录号WOS:000322725000033
公开日期2014-04-18
源URL[http://ir.ciac.jl.cn/handle/322003/50225]  
专题长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式
GB/T 7714
Sun CT,Xue DF. Size-dependent oxygen storage ability of nano-sized ceria[J]. physical chemistry chemical physics,2013,15(34):14414-14419.
APA Sun CT,&Xue DF.(2013).Size-dependent oxygen storage ability of nano-sized ceria.physical chemistry chemical physics,15(34),14414-14419.
MLA Sun CT,et al."Size-dependent oxygen storage ability of nano-sized ceria".physical chemistry chemical physics 15.34(2013):14414-14419.

入库方式: OAI收割

来源:长春应用化学研究所

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