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2009 , Vol. 24 >Issue 1: 187 - 191

DOI: https://doi.org/10.3724/SP.J.1077.2009.00187

研究论文

ZrO2对NiO/CeO2/γ-Al2O3复合催化剂结构的影响

  • 杨修春 ,
  • 卢振光 ,
  • 康晓春 ,
  • 韦亚南
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  • 同济大学材料科学与工程学院，上海 200092

收稿日期: 2008-05-06

  修回日期: 2008-07-03

  网络出版日期: 2009-01-20

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Effect of ZrO2 on the Structure of NiO/CeO2/γ-Al2O3 Composite Catalysts

  • YANG Xiu-Chun ,
  • LU Zhen-Guang ,
  • KANG Xiao-Chun ,
  • WEI Ya-Nan
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  • School of Materials Science and Engineering, Tongji University, Shanghai 200092, China

Received date: 2008-05-06

  Revised date: 2008-07-03

  Online published: 2009-01-20

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摘要

以Ni(NO3)2·6H2O、Al(NO3)3·9H2O、ZrOCl2·8H2O和Ce(NO3)3·6H2O为原料，采用共沉淀法分别制备了NiO/CeO2/γ-Al2O3和NiO/CeO2-ZrO2/Al2O3催化剂.通过X射线衍射（XRD）、透射电子显微镜（TEM）和近边X射线吸收精细结构（XANES）等方法对催化剂的组成结构进行表征.结果表明，煅烧温度高于600℃时，NiO/CeO2/γ-Al2O3催化剂中的NiO与γ-Al2O3载体发生作用，形成NiAl2O4尖晶石；而NiO/CeO2-ZrO2/Al2O3催化剂中，NiO能够稳定存在，没有NiAl2O4尖晶石生成，且Al2O3与CeO2和ZrO2作用形成一种新的Zr0.30Ce0.45Al0.25O1.87固溶体.

关键词： 共沉淀法; NiO; NiAl2O4尖晶石; Zr0.30Ce0.45Al0.25O1.87固溶体

本文引用格式

杨修春 , 卢振光 , 康晓春 , 韦亚南 . ZrO2对NiO/CeO2/γ-Al2O3复合催化剂结构的影响[J]. 无机材料学报, 2009 , 24(1) : 187 -191 . DOI: 10.3724/SP.J.1077.2009.00187

Abstract

Using Ni(NO3)2·6H2O, Al(NO3)3·9H2O，ZrOCl2·8H2O and Ce(NO3)3·6H2O as raw materials, NiO/CeO2/Al2O3 and NiO/CeO2-ZrO2/A2O3 composite catalysts were prepared by co-precipitation method. Structures of the composite catalysts were investigated by X-ray diffraction (XRD), high resolution transmission electron microscope (TEM) and X-ray absorption near edge structure (XANES) spectroscope. Results indicate that NiO phase in NiO/CeO2/γ-Al2O3 catalysts disappears above 600℃ because it interact with γ-Al2O3 to form NiAl2O4 spinel. However, no NiAl2O4 spinel is found in NiO/CeO2-ZrO2/Al2O3 catalysts annealed at 700℃ due to the formation of Zr0.30Ce0.45Al0.25O1.87 solid solution.

Key words： co-precipitation; NiO; NiAl2O4 spinel; Zr0.30Ce0.45Al0.25O1.87solid solution

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