高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

Ni-V-O催化剂的合成、表征及其催化性能

徐爱菊1,2, 林勤1, 照日格图2, 贾美林2   

    1. 北京科技大学冶金与生态工程学院, 北京 100083;
    2. 内蒙古师范大学化学与环境科学学院, 呼和浩特 010022
  • 收稿日期:2007-09-06 修回日期:1900-01-01 出版日期:2008-02-10 发布日期:2008-02-10
  • 通讯作者: 照日格图

Synthesis, Characterization and Catalytic Performance of Ni-V-O Catalysts

XU Ai-Ju1,2, LIN Qin1, ZHAORIGETU Bao2*, JIA Mei-Lin2   

    1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
    2. College of Chemistry & Environmental Science, Inner Mongolia Normal University, Hohhot 010022, China
  • Received:2007-09-06 Revised:1900-01-01 Online:2008-02-10 Published:2008-02-10
  • Contact: ZHAORIGETU Bao

PDF (PC)

被引次数

16

摘要： 制备了Ni3V2O8, Ni2V2O7, NiV2O6催化剂, 进行了XRD, BET, H2-TPR, XPS和电导等表征, 并测试了这三种结构催化剂对丙烷氧化脱氢制丙烯反应的催化性能, 分析了影响催化性能的因素. 实验结果表明, 当丙烷的转化率为10%时, 在p-型半导体Ni3V2O8和Ni2V2O7催化剂上丙烯的选择性为69.13%和70.21%, 而在n-型半导体NiV2O6上, 丙烯的选择性为64.41%, 表明p-型半导体Ni3V2O8和Ni2V2O7的催化性能优于n-型半导体NiV2O6的催化性能. XPS实验结果表明, 这可能与p-型半导体正钒酸镍(Ni3V2O8)和焦钒酸镍(Ni2V2O7)催化剂表面含较多O-氧物种和V4+有关.

关键词: Ni-V-O催化剂, 氧化脱氢(ODH), 半导体, 氧物种

Abstract: Catalysts Ni3V2O8, Ni2V2O7, NiV2O6 were prepared and characterized by X-ray diffraction(XRD), BET, H2-TPR, XPS and conductivity measurement. Their catalytic performance for the oxidative dehydrogenation of propane to propene was investigated. The results show that the selectivities to propene were 69.13%, 70.21% and 64.41% over p-type semiconductor Ni3V2O8, Ni2V2O7 and n-type NiV2O6 catalysts with 10% propane conversion, respectively. These results suggest that p-type semiconductor catalysts have a better catalytic performance than n-type ones, that C3H6 selectivity has a good correlation with the electrical conductivity and that selectivity depends on the existence of Ni3V2O8 or Ni2V2O7 phase. XPS results illustrate that high catalytic performance on p-type semiconductor Ni3V2O8 and Ni2V2O7 was related to the abundant oxygen species O- and V4+ existing over these catalysts.

Key words: Ni-V-O Catalyst, Oxidative dehydrogenation(ODH), Semiconductor, Oxygen species

中图分类号: 

TrendMD: