ICCAS OpenIR
Structure characteristic of novel SnxZr1-xO2 solid solution catalysts for NO selective reduction
Wei, JY; Zhu, YX; Duan, LY; Xie, YC
2003-06-01
Source PublicationACTA PHYSICO-CHIMICA SINICA
ISSN1000-6818
Volume19Issue:6Pages:498-503
AbstractA series of SnxZr1-xO2 solid solution catalysts with SnO2 content varied from 10% (w) to 90% ( w) were prepared by co-current coprecipitation method (CCP method) using ammonia solution as precipitating agent and calcined at 500degreesC for 4 h in air. The structure variation with SnO2 content was investigated by XRD, electron diffraction, FT-Raman and FT-IR. Tin dioxide and zirconia can react with each other to form solid solutions within a large composition range. In the present work, zirconia prepared by CCP method and calcined at 500degreesC was monoclinic, and tin dioxide prepared by the same way possessed rutile structure. The experiment results showed the following dependence of the solid solution structure on SnO2 content. First, less than 20% SnO2 inserted into the lattice of ZrO2 could stabilize the tetragonal structure of zirconia and form the zirconia-rich solid solutions. Then, amorphous zirconia-rich solid solutions were formed in the SnO2 content region from 30% to 50%. Furthermore, a rutile structure tin dioxide-rich solid solution existed as SnO2 content over 60%. Finally, the zirconia-rich solid solution and tin dioxide-rich solid solution could co-exist while the SnO2 content maintained at 55%, which exhibited a structure transition between zirconia-rich and tin dioxide-rich solid solutions. Because the Sn-O bond was weakened and the effective electropositivity of Sn4+ was decreased as Zr4+ inserted into SnO2 lattice as proved by FT-Raman and FT-IR measurements, both the activation and the complete combustion of propene were restrained by Zr4+, as a result, the catalytic performance for NO selective reduction was promoted.
KeywordNo Selective Catalytic Reduction Snxzr1-xo2 Solid Solution Rutile Structure
DOI10.3866/PKU.WHXB20030604
Indexed BySCI
Language英语
WOS IDWOS:000183785400004
PublisherPEKING UNIV PRESS
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/79808
Collection中国科学院化学研究所
Corresponding AuthorXie, YC
AffiliationPeking Univ, State Key Lab Struct Chem Unstable & Stable Speci, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Wei, JY,Zhu, YX,Duan, LY,et al. Structure characteristic of novel SnxZr1-xO2 solid solution catalysts for NO selective reduction[J]. ACTA PHYSICO-CHIMICA SINICA,2003,19(6):498-503.
APA Wei, JY,Zhu, YX,Duan, LY,&Xie, YC.(2003).Structure characteristic of novel SnxZr1-xO2 solid solution catalysts for NO selective reduction.ACTA PHYSICO-CHIMICA SINICA,19(6),498-503.
MLA Wei, JY,et al."Structure characteristic of novel SnxZr1-xO2 solid solution catalysts for NO selective reduction".ACTA PHYSICO-CHIMICA SINICA 19.6(2003):498-503.
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