Stability of Pt-Co bimetallic particles

effect of the support induced morphology on reactivity in CO hydrogenation

Genmin Lu, Zoltán Zsoldos, Z. Koppány, L. Guczi

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The structure and the stability of bimetallic particles are controlled by their interaction with surface oxide species on support or by support geometry. Location and size of the bimetallic particles estimated by XRD and XPS, depends on the environment and treatment. Thus, the Pt-Co bimetallic particles entrapped in NaY zeolite cages become unstable upon mild oxidation by O2 and/or reaction with surface protons causing the Co2+ ions formed to migrate irreversibly from the supercages into the sodalite cages as determined by TPR and TPD. Differences in the selectivity pattern observed for the CO hydrogenation over alumina and NaY zeolite supported Pt-Co catalysts, can be interpreted by the interaction between bimetallic particles with surface cobalt oxide species and the zeolite cage wall, respectively.

Original languageEnglish
Pages (from-to)15-22
Number of pages8
JournalCatalysis Letters
Volume24
Issue number1-2
DOIs
Publication statusPublished - Mar 1994

Fingerprint

Zeolites
Carbon Monoxide
Hydrogenation
hydrogenation
reactivity
Oxides
Aluminum Oxide
Temperature programmed desorption
sodalite
cobalt oxides
Protons
Cobalt
Alumina
X ray photoelectron spectroscopy
Ions
Oxidation
Catalysts
Geometry
aluminum oxides
selectivity

Keywords

  • CO hydrogenation on
  • decomposition of bimetallic on mild oxidation
  • Pt-Co in NaY
  • XPS on

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Catalysis

Cite this

Stability of Pt-Co bimetallic particles : effect of the support induced morphology on reactivity in CO hydrogenation. / Lu, Genmin; Zsoldos, Zoltán; Koppány, Z.; Guczi, L.

In: Catalysis Letters, Vol. 24, No. 1-2, 03.1994, p. 15-22.

Research output: Contribution to journalArticle

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