Phosphorus-Doped Tungsten Oxynitrides: Synthesis, Characterization, and Catalytic Behavior in Propene Hydrogenation and n-Heptane Isomerization

The effect of phosphorus on tungsten oxynitrides has been studied. Phosphorus was introduced via tungsten heteropolyanions. Propene hydrogenation and n-heptane isomerization were used to probe the activity and selectivity of the doped materials. Catalysts were characterized using elemental analysis,...

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Bibliographic Details
Published in:Journal of catalysis 2002-01, Vol.205 (1), p.191-198
Main Authors: Pérez-Romo, P., Potvin, C., Manoli, J.-M., Djéga-Mariadassou, G.
Format: Article
Language:English
Subjects:
Catalysis
Catalysts: preparations and properties
characterization
Chemistry
Exact sciences and technology
General and physical chemistry
heteropolyanion precursor
phosphorus
synthesis
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
tungsten oxynitride
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Summary:The effect of phosphorus on tungsten oxynitrides has been studied. Phosphorus was introduced via tungsten heteropolyanions. Propene hydrogenation and n-heptane isomerization were used to probe the activity and selectivity of the doped materials. Catalysts were characterized using elemental analysis, X-ray diffraction, N2 BET surface area, CO chemisorption, and X-ray photoelectron spectroscopy (XPS). Reactivity experiments over P-containing oxynitrides show enhanced hydrogenating properties and decreased n-heptane isomerization. As indicated by XPS measurements, tungsten oxynitrides show higher concentrations of lower W oxidation states on P addition.
ISSN:0021-9517
1090-2694
DOI:10.1006/jcat.2001.3434