XPS Study of Pt and CoPt Clusters in Na Mordenite

BOIX, ALICIA V.; CORNAGLIA, LAURA; ULLA, MA ALICIA; PETUNCHI, JUAN

Surface; Vacuum and their Applications

AIP Press, American Institute of Physics

Lugar: Woodbury, New york; Año: 1996 vol. 378 p. 539 - 542

The reducibility of CoMordenite and the effect of the addition of different Pt contents were studies by XPS and volumetric reduction with H2. This was related to the activity and selectivity to methane for CO2 hydrogenation. In bimetallic catalysts, Pt2+ and Co2+ ions, and particles of Pt0 and Co0 were detected by XPS after reductions in situ. The presence of Pt increases the fraction of reduced Co, also increasing the activity and selectivity to methane.