Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

Preparation and Property of Ce-Zr-Al Oxygen Storage Materials Modified by Y~(3+) and Bi~(3+) Addition

ZHU Qing-Chao,LI Xiu-Min,LI Hong-Mei,ZHENG Ling-Min,CHEN Yao-Qiang,GONG Mao-Chu(Key Laboratory of Green Chemistry & Technology(Ministry of Education),College of Chemistry Sichuan University,Chengdu 610064,China)  
A series of CeO2-ZrO2-Al2O3 oxygen storage materials were prepared by co-precipitation method and characterized by means of X-ray diffraction(XRD),low temperature nitrogen adsorption-desorption,oxygen storage capacity(OSC) and H2-temperature programmed reduction(H2-TPR).The results of XRD show that the phase structure of CZA are not changed by the addition of Y~(3+) and Bi~(3+),and all samples remain the single cubic fluorite structure after calcination at 600℃ and 1000℃.According to the results of low temperature nitrogen adsorption,the textural properties and thermal stability of Ce0.6Zr0.3Y0.1O1.95-Al2O3(CZYA)make a great progress after the introduction of Y~(3+),and after calcination at 1000℃ for 5h,specific surface area and pore volume of CZYA achieve 80.75m2/g and 0.22mL/g,respectively.The results of OSC and H2-TPR show that co-doping Y~(3+) and Bi~(3+) into CZA exhibit positive effect on OSC of the materials.The OSC of Ce0.6Zr0.2Y0.1Bi0.1O1.9-Al2O3(CZYBA)calcinated at 600℃ and 1000℃ reach 461μmol/g and 242μmol/g,respectively.Meanwhile the redox property of CZYBA is enhanced,the reduction peak temperature can be reduced from 546℃ to 429℃ after calcination at 1000℃ for 5h.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved