A comparative study of CO preferential oxidation over Pt and Pt0.5Co0.5 nanoparticles: Kinetic study and quantum-chemical calculations

D. I. Potemkin, E. Yu Filatov, A. V. Zadesenets, A. M. Gorlova, N. A. Nikitina, D. A. Pichugina

Research output: Contribution to journalArticle

Abstract

CO preferential (PROX) and total (TOX) oxidation were studied over Pt and Pt0.5Co0.5 nanopowders. Pt0.5Co0.5 exhibited much higher CO PROX performance than Pt, being highly active and selective at 0–80 °C. Low-temperature activity in CO oxidation was shown to be the key feature of bimetallic Pt-Co catalysts in comparison with monometallic Pt. Density functional theory calculations of the oxidation of CO on Pt13 and Pt12Co clusters revealed that a better catalytic activity of bimetallic cluster is due to an electronic effect: the calculated atomic charges on platinum atoms change when cobalt is introduced into its composition.

Original languageEnglish
Article number126915
Number of pages3
JournalMaterials Letters
Volume260
DOIs
Publication statusPublished - 1 Feb 2020

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Keywords

  • Bimetallic catalysts
  • Density functional theory
  • Interfaces
  • Nanoparticles
  • Preferential CO oxidation
  • Pt-Co catalysts
  • CATALYSIS
  • HYDROGEN
  • SELECTIVE OXIDATION
  • ALLOYS
  • MODEL
  • DOUBLE COMPLEX SALT

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