Quantifying oxygen induced surface enrichment of a dilute PdAu alloy catalyst

Karatok M., Madix R. J., Van Der Hoeven J. E. S., Aizenberg J., Reece C.

Catalysis Science and Technology, vol.11, no.23, pp.7530-7534, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 11 Issue: 23
  • Publication Date: 2021
  • Doi Number: 10.1039/d1cy01337h
  • Journal Name: Catalysis Science and Technology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC, Metadex
  • Page Numbers: pp.7530-7534
  • Hacettepe University Affiliated: No

Abstract

Dilute PdAu alloys are promising catalysts for selective oxidation and hydrogenation reactions. However, the surface composition and active site density of the minority metal, Pd, is unknown. In this study, we quantitatively determine a three-fold increase in the Pd site density on the surface of a dilute Pd0.08Au0.92 alloy catalyst after oxygen activation by titrating the oxidized surface with quantified pulses of CO.