Synthesis and structural characterization of SiO2-supported PtFe catalysts prepared from PtFe2(C8H12)(CO) 8

Attilio Siani, Burjor Captain, Richard D. Adams, Oleg S. Alexeev, Michael D. Amiridis

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Fourier transform infrared (FTIR) and extended X-ray absorption fine structure (EXAFS) spectroscopies were used to characterize the species formed following deposition of a PtFe2(COD)(CO)8 cluster on SiO2 and removal of the organic ligands. The results indicate that the PtFe2(COD)(CO)8 cluster initially adsorbs weakly on the SiO2 surface but loses a fraction of the organic ligands during aging under N2 and thus becomes bonded to the surface. The PtFe 2 cluster core remains nearly intact during this process. The organic ligands can be further removed from freshly impregnated species by thermal treatments in either He or H2 at 350 °C. Both treatments lead to the formation of bimetallic surface species with average dimensions on the order of 1 nm. However, these PtFe bimetallic species undergo substantial structural changes under CO oxidation conditions.

Original languageEnglish (US)
Pages (from-to)318-333
Number of pages16
JournalTopics in Catalysis
Volume54
Issue number5-7
DOIs
StatePublished - Apr 1 2011

Keywords

  • Bimetallic catalysts
  • CO oxidation
  • EXAFS
  • Iron
  • Platinum

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Fingerprint Dive into the research topics of 'Synthesis and structural characterization of SiO<sub>2</sub>-supported PtFe catalysts prepared from PtFe<sub>2</sub>(C<sub>8</sub>H<sub>12</sub>)(CO) <sub>8</sub>'. Together they form a unique fingerprint.

Cite this