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Comparison between electrical conductivity properties and catalytic activity of nickel molybdate

✍ Scribed by Gérard Thomas; Magali Sautel; Akim Kaddouri; Carlo Mazzocchia

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
481 KB
Volume
101-103
Category
Article
ISSN
0167-2738

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✦ Synopsis

Nickel molybdates obtained by calcination of precursors were found to be effective catalysts for the oxy-dehydrogenation of propane into propene. Various preparation and calcination conditions lead to different powders of nickel molybdate characterized by atomic absorption spectroscopy and powder X-ray diffraction. Their defect properties, studied by electrical conductivity, can be linked to catalytic activity. It can be assumed that some of the molybdenum atoms and electrons in interstitial position in nickel molybdate compounds are responsible for n-type conductivity. Some catalytic tests were carried out and allow to conclude that free electrons in nickel molybdates could make easier the propane adsorption or its reaction with oxygen.

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