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Synthesis and characterization of Ni-doped vanadium phosphorus oxide catalysts


Yap, Taufiq Yun Hin and Abdul Aziz, Abdul Ghani (2007) Synthesis and characterization of Ni-doped vanadium phosphorus oxide catalysts. Chinese Journal of Catalysis, 28 (12). pp. 1037-1040. ISSN 1872-2067


The effect of Ni doping (1%, 2%, and 5%) on vanadium phosphate catalysts prepared via VOPO4·2H2O was described and discussed. At low levels, the Ni dopant significantly enhanced the amount of the active lattice oxygen species O− and lowered the reduction peak temperature corresponding to the reduction of V5+ and V4+ phases. A combination of powder X-ray diffraction, temperature-programmed reduction, and chemical analysis data shows that at higher levels, Ni doping induced the formation of the V5+ phase and suppressed the presence of the V4+ phase. Previous studies have indicated that a large amount of oxygen species associated with V5+ inhibit the n-butane conversion but promote the selectivity for maleic anhydride.

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Official URL or Download Paper: http://dx.doi.org/10.1016/S1872-2067(08)60005-4

Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1016/S1872-2067(08)60005-4
Publisher: Elsevier
Keywords: Vanadyl pyrophosphate; Nickel; n-butane; Oxidation; Maleic anhydride
Depositing User: Erni Suraya Abdul Aziz
Date Deposited: 22 Sep 2010 09:57
Last Modified: 25 Nov 2016 01:19
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/S1872-2067(08)60005-4
URI: http://psasir.upm.edu.my/id/eprint/7855
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