Surface studies and catalytic properties of the bifunctional bulk MoO 2  system | Zendy

Katrib A. | Zendy; Sobczak J. W. | Zendy; Krawczyk M. | Zendy; Zommer L. | Zendy; Benadda A. | Zendy; Jablonski A. | Zendy; Maire G. | Zendy

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Surface studies and catalytic properties of the bifunctional bulk MoO 2 system

Author(s) -

Katrib A.,

Sobczak J. W.,

Krawczyk M.,

Zommer L.,

Benadda A.,

Jablonski A.,

Maire G.

Publication year - 2002

Publication title -

surface and interface analysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.52

H-Index - 90

eISSN - 1096-9918

pISSN - 0142-2421

DOI - 10.1002/sia.1288

Subject(s) - bifunctional , x ray photoelectron spectroscopy , catalysis , chemistry , hydrogen , isomerization , metal , analytical chemistry (journal) , inorganic chemistry , chemical engineering , organic chemistry , engineering

X‐ray photoelectron spectroscopy measurements of commercial bulk MoO 2 revealed the presence of MoO 3 and Mo 2 O 5 phases in the sample surface region. In situ hydrogen reduction at different temperatures up to 650 K enabled to be reduced Mo 6+ and Mo 5+ to Mo 4+ . Bulk MoO 2 as prepared by hydrogen reduction of the initial samples showed very interesting catalytic properties in terms of isomerization reactions of alkanes. This catalytic activity was attributed to the MoO 2 phase on the surface, which had both metallic and acidic functions (bifunctional mechanism). In addition, inelastic mean free paths in MoO 2 catalyst were measured experimentally by elastic peak electron spectroscopy (EPES). Copyright © 2002 John Wiley & Sons, Ltd.

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