State kinetics of the oxidation of MoO2 investigated by time-resolved X-ray absorption spectroscopy

Authors
Ressler, T Wienold, J Jentoft, RE Timpe, O Neisius, T
Citation
T. Ressler et al., State kinetics of the oxidation of MoO2 investigated by time-resolved X-ray absorption spectroscopy, SOL ST COMM, 119(3), 2001, pp. 169-174
Citations number
17
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
119
Issue
3
Year of publication
2001
Pages
169 - 174
Database
ISI
SICI code
0038-1098(2001)119:3<169:SKOTOO>2.0.ZU;2-3
Abstract
The isothermal oxidation of MoO2 in oxygen (100%) at temperatures between 6 23 K and 823 K is studied by time-resolved in situ X-ray absorption spectro scopy. Four rate-determining steps (i.e. mass transport, boundary control, nuclei growth, and diffusion) dependent on temperature and the extent of re action are found to govern the rapid oxidation of MoO2. The XANES and EXAFS results presented show that time-resolved XAFS studies can be used to inve stigate rapid solid-state reactions and to elucidate kinetics and structura l evolution of the constituent phases. (C) 2001 Elsevier Science Ltd. All r ights reserved.