Study of the pretreatment chemistry and thermal stability of zirconia supported Ru-Pt catalysts

Authors
Gonzalez-Velasco, JR Gutierrez-Ortiz, MA Gonzalez-Marcos, JA Pranda, P Steltenpohl, P
Citation
Jr. Gonzalez-velasco et al., Study of the pretreatment chemistry and thermal stability of zirconia supported Ru-Pt catalysts, J CATALYSIS, 187(1), 1999, pp. 24-29
Citations number
23
Categorie Soggetti
Physical Chemistry/Chemical Physics","Chemical Engineering
Journal title
JOURNAL OF CATALYSIS
ISSN journal
00219517 → ACNP
Volume
187
Issue
1
Year of publication
1999
Pages
24 - 29
Database
ISI
SICI code
0021-9517(19991001)187:1<24:SOTPCA>2.0.ZU;2-P
Abstract
The behavior of zirconia supported Ru and/or Pt catalysts in conditions of TPReduction and pulse chemisorption is studied. In order to understand the process of precursor decomposition, several catalysts prepared by either (c o)adsorption or (co)impregnation methods and treated in air or nitrogen are investigated by DSC, MS, and by IRS. A possible adsorption path of Ru(NO)( NO3)(3) over zirconia and its subsequent decomposition during catalyst cond itioning is discussed. Stabilization of supported ruthenium in the presence of platinum due to formation of bimetallic cluster was observed, especiall y when the catalyst was prepared by adsorption. (C) 1999 Academic Press.