PHYSICAL CHARACTERIZATION OF MOLYBDENUM OXYCARBIDE CATALYST - TEM, XRD AND XPS

Citation
P. Delporte et al., PHYSICAL CHARACTERIZATION OF MOLYBDENUM OXYCARBIDE CATALYST - TEM, XRD AND XPS, Catalysis today, 23(3), 1995, pp. 251-267
Citations number
43
Categorie Soggetti
Engineering, Chemical","Chemistry Applied","Chemistry Physical
Journal title
ISSN journal
09205861
Volume
23
Issue
3
Year of publication
1995
Pages
251 - 267
Database
ISI
SICI code
0920-5861(1995)23:3<251:PCOMOC>2.0.ZU;2-Y
Abstract
Controlled reduction of MoO3 can produce different phases of catalytic interest. One of these phases has been considered as being an oxycarb ide of molybdenum. Various techniques mainly TEM but also XRD and othe rs have been extensively used to understand the mechanism of formation and the structure of this oxycarbide. Its structure is reminiscent of the MoO3 structure as shown by XRD, but reconstructed by shear planes and the introduction of carbon atoms to fill oxygen vacancies, both b locking the formation of MoO2 the normal product of the slow reduction of MoO3. The HRTEM pictures showed a 'chevron-like' arrangement and t he electronic microdiffraction a square lattice reminiscent of the (Ok O) planes of MoO3.