Interaction of CO with platinum species in zeolites. Evidence for platinum carbonyls in partially reduced zeolite PtNaX

  • Bischoff H
  • Jaeger N
  • Schulz-Ekloff G
 et al. 
  • 5

    Readers

    Mendeley users who have this article in their library.
  • 49

    Citations

    Citations of this article.

Abstract

The decomposition of Pt(NH3)42+in zeolite NaX both in vacuo and in flowing oxygen (Tmax=630 K) yields a variety of ionic species, which appear in IR spectra as PtO-, Ptδ+-, Pt2+- CO and [Pt(CO)2]+complexes formed after the adsorption of CO at 300 K. Subsequent reduction with hydrogen results in characteristic particle size distributions, which are reflected in distinct vibration frequencies of adsorbed CO, i.e., ca. 2010 cm-1for d≈1.2 nm (supercage size) and ca. 2070 cm-1for d≈4 nm. A hydrated precalcined sample treated with CO shows unusual low platinum carbonyl bands at 1930-1950 and 1720-1740 cm-1, assigned to [Pt3(CO)6]2-clusters, supported on Pt2+/PtO. The appearance of these Chini complexes is most probably connected with the occurrence of the low temperature water gas shift reaction. © 1993.

Author-supplied keywords

  • carbon monoxide
  • chemisorption
  • infrared spectroscopy
  • low temperature water gas shift
  • platinum carbonyl complexes
  • zeolites

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • H. Bischoff

  • N. I. Jaeger

  • G. Schulz-Ekloff

  • L. Kubelkova

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free