AN XPS STUDY OF RU-PROMOTION FOR CO CEO2 FISCHER-TROPSCH CATALYSTS/

Authors
HOANG M HUGHES AE TURNEY TW
Citation
M. Hoang et al., AN XPS STUDY OF RU-PROMOTION FOR CO CEO2 FISCHER-TROPSCH CATALYSTS/, Applied surface science, 72(1), 1993, pp. 55-65
Citations number
36
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical
Journal title
Applied surface science → ACNP
ISSN journal
01694332
Volume
72
Issue
1
Year of publication
1993
Pages
55 - 65
Database
ISI
SICI code
0169-4332(1993)72:1<55:AXSORF>2.0.ZU;2-O
Abstract
X-ray photoelectron spectroscopy has been used to examine the reductio n behaviour of co-precipitated Co3O4/CeO2 and of Ru-promoted Co3O4/CeO 2. It was found, by evaluating the percentage of Co-degrees and Ce3+, that the presence of Co3O4 lowered the reduction temperature of CeO2. After reduction at 550-degrees-C the stoichiometry of the cerium oxide in the Co3O4/CeO2 coprecipitate was CeO1.77+/-0.01. Promotion with Ru lowered the reduction temperatures of both Co3O4 and CeO2. In the Ru- promoted case the reduction of ceria to CeO1.84+/-0.01 was achieved at temperatures as low as 170-degrees-C.