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

Chem. J. Chinese Universities

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

XU Ai-Ju^1,2, 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

Abstract

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

CLC Number:

O643
O611.4

TrendMD:

XU Ai-Ju^1,2, LIN Qin¹, ZHAORIGETU Bao²*, JIA Mei-Lin². Synthesis, Characterization and Catalytic Performance of Ni-V-O Catalysts[J]. Chem. J. Chinese Universities, doi: .

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

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