Activity of SiO2 supported gold-palladium catalysts in CO oxidation

A. M. Venezia, L. F. Liotta, G. Pantaleo, V. La Parola, G. Deganello, A. Beck, Zs Koppány, K. Frey, D. Horváth, L. Guczi

Research output: Contribution to journalArticle

153 Citations (Scopus)

Abstract

Bimetallic Au-Pd catalysts supported on silica with different Au/Pd atomic ratios were prepared by simultaneous reduction of palladium and gold precursors by ethanol in the presence of the polymer, polyvinylpyrrolidone (PVP). Formation of alloyed particles was detected by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and CO chemisorption measurements. The catalysts were tested in the catalytic oxidation of CO using a plug-flow reactor. The CO conversion was determined as a function of temperature. The monometallic palladium and the palladium-rich catalysts behaved quite similarly and were the most active catalysts. A drastic reduction of the CO oxidation activity was observed for the 50/50 Au/Pd catalyst and for samples with increasing amount of gold.

Original languageEnglish
Pages (from-to)359-368
Number of pages10
JournalApplied Catalysis A: General
Volume251
Issue number2
DOIs
Publication statusPublished - Sep 30 2003

Keywords

  • Au-Pd catalysts
  • CO oxidation
  • Polyvinylpyrrolidone
  • XPS characterization
  • XRD

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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