典型文献
A novel ceria hollow nanosphere catalyst for low temperature NOx storage
文献摘要：
In this work,a highly active CeO2 catalyst with hollow nanosphere morphology for low temperature NOx storage was prepared by a surfactant-assisted solvothermal reaction.The physicochemical properties of ceria samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),N2 adsorption-desorption,H2-temperature programmed reduction(H2-TPR),X-ray photoelectron spectroscopy(XPS)and in situ diffused reflectance infrared Fourier transform spectroscopy(DRIFTS).The as-prepared CeO2 nanosphere possesses excellent NO oxidation capacity,smaller mesopores,better reducibility and more surface Ce3+content.Compared with CeO2 with nanorod and nanoparticle morphologies,CeO2 nanosphere shows better intrinsic low tem-perature NOx trapping performance,with a wide operating temperature window(150-300℃),high NOx adsorption capacity(NAC,640-745 μmol/g)and high NOx storage capacity(NSC,250-350 μmol/g).Two reaction pathways are speculated for NOx adsorption on CeO2 nanosphere,including"nitrate route"and"nitrite route".The thermally unstable surface nitrites formed on the CeO2 nanosphere allow ceria to release more NOx during the desorption process.The present work provides a new ceria morphology for NOx traps,which may become a potential excellent NOx storage material.
文献关键词：
中图分类号：
作者姓名：
Wenxu Liu;Huiming Cao;Zhongpeng Wang;Chenchen Cui;Liangran Gan;Wei Liu;Liguo Wang
作者机构：
School of Water Conservancy and Environment,University of Jinan,Jinan 250022,China;Shandong Provincial Eco-environment Monitoring Center,Jinan 250101,China
文献出处：
引用格式：
[1]Wenxu Liu;Huiming Cao;Zhongpeng Wang;Chenchen Cui;Liangran Gan;Wei Liu;Liguo Wang-.A novel ceria hollow nanosphere catalyst for low temperature NOx storage)[J].稀土学报（英文版）,2022(04):626-635
A类：
Ce3+content,nitrites
B类：
novel,ceria,hollow,nanosphere,catalyst,temperature,NOx,storage,In,this,work,highly,active,CeO2,morphology,was,prepared,by,surfactant,assisted,solvothermal,reaction,physicochemical,properties,samples,were,characterized,ray,diffraction,scanning,microscopy,transmission,TEM,N2,adsorption,desorption,H2,programmed,reduction,TPR,photoelectron,spectroscopy,XPS,situ,diffused,reflectance,infrared,Fourier,transform,DRIFTS,possesses,excellent,oxidation,capacity,smaller,mesopores,better,reducibility,more,surface,Compared,nanorod,nanoparticle,morphologies,shows,intrinsic,trapping,performance,wide,operating,window,NAC,NSC,Two,pathways,speculated,including,nitrate,route,thermally,unstable,formed,allow,release,during,process,present,provides,new,traps,which,may,become,potential,material
AB值：
0.548128
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