On the role of hydrogen during the reduction-carburation of MoO3 into molybdenum oxycarbide

Authors
Bouchy, C Pham-huu, C Ledoux, MJ
Citation
C. Bouchy et al., On the role of hydrogen during the reduction-carburation of MoO3 into molybdenum oxycarbide, J MOL CAT A, 162(1-2), 2000, pp. 317-334
Citations number
39
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
ISSN journal
13811169 → ACNP
Volume
162
Issue
1-2
Year of publication
2000
Pages
317 - 334
Database
ISI
SICI code
1381-1169(20001120)162:1-2<317:OTROHD>2.0.ZU;2-G
Abstract
The presence of hydrogen is necessary to form the oxycarbide. (MoO2.4C0.2H0 .8) from MoO3. This hydrogen should be dissociated either by traces of MoO2 or Pt in order to form a bronze, the precursor of the oxycarbide. This mec hanism induces a topotactic formation of the new material, the (200) oxycar bide planes being parallel to the initial (0k0) planes of MoO3. In the abse nce of hydrogen only non-topotactic formation of MoO2 is observed. (C) 2000 Elsevier Science B.V. All rights reserved.