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, cilt.11, sa.23, ss.7530-7534, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 11 Sayı: 23
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1039/d1cy01337h
  • Dergi Adı: Catalysis Science and Technology
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC, Metadex
  • Sayfa Sayıları: ss.7530-7534
  • Hacettepe Üniversitesi Adresli: Hayır

Özet

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.