INCAPE 05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
artículos
Título:
Study ofthewater-gasshiftreactionoverPtsupportedonCeO2ZrO2 mixed oxides
Autor/es:
C.I. VIGNATTI, M.S. AVILA, C.R. APESTEGUÍA, T.F. GARETTO
Revista:
CATALYSIS TODAY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2010
ISSN:
0920-5861
Resumen:
The watergasshift(WGS)reactionwasstudiedonPt/CeO2, Pt/ZrO2 and Pt/CexZr1−xO2 catalysts. Allthe samples werecharacterizedbyavarietyofphysicalandspectroscopictechniques.Thecatalystactivities were evaluatedat250 ◦C inarecirculatingreactorthroughCOconversionversustimetestsandalso by insitudiffusereflectioninfraredFouriertransformspectroscopy(DRIFTS).Thesampleactivityfor the WGSreactiondependedonchemicalcomposition.Pt/CexZr1−xO2 catalysts with x≥0.5 weremore active thanPt/CeO2, probablybecausetheadditionofZrtoceriaincreasedboththesurfaceareaandthe reducibility ofceria.ThelowestCOconversionrateswereobtainedonPt/ZrO2 and Zr-richPt/CexZr1−xO2 samples. BasedonDRIFTSexperiments,thisresultwasinterpretedbyconsideringthatintheWGSformate associative mechanismthestabilityofformatespeciesishigheronZr-richsupports.
