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 journalArticle

9 Citations (Scopus)

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

Fingerprint

Catalyst supports
Ligands
Extended X ray absorption fine structure spectroscopy
Fourier transforms
Aging of materials
Heat treatment
Infrared radiation
Oxidation

Keywords

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

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

Synthesis and structural characterization of SiO2-supported PtFe catalysts prepared from PtFe2(C8H12)(CO) 8. / Siani, Attilio; Captain, Burjor; Adams, Richard D.; Alexeev, Oleg S.; Amiridis, Michael D.

In: Topics in Catalysis, Vol. 54, No. 5-7, 01.04.2011, p. 318-333.

Research output: Contribution to journalArticle

Siani, Attilio ; Captain, Burjor ; Adams, Richard D. ; Alexeev, Oleg S. ; Amiridis, Michael D. / Synthesis and structural characterization of SiO2-supported PtFe catalysts prepared from PtFe2(C8H12)(CO) 8. In: Topics in Catalysis. 2011 ; Vol. 54, No. 5-7. pp. 318-333.
@article{68fed799d3704f4cbc226b1cb1eaa3f3,
title = "Synthesis and structural characterization of SiO2-supported PtFe catalysts prepared from PtFe2(C8H12)(CO) 8",
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.",
keywords = "Bimetallic catalysts, CO oxidation, EXAFS, Iron, Platinum",
author = "Attilio Siani and Burjor Captain and Adams, {Richard D.} and Alexeev, {Oleg S.} and Amiridis, {Michael D.}",
year = "2011",
month = "4",
day = "1",
doi = "10.1007/s11244-011-9665-2",
language = "English",
volume = "54",
pages = "318--333",
journal = "Topics in Catalysis",
issn = "1022-5528",
publisher = "Springer Netherlands",
number = "5-7",

}

TY - JOUR

T1 - Synthesis and structural characterization of SiO2-supported PtFe catalysts prepared from PtFe2(C8H12)(CO) 8

AU - Siani, Attilio

AU - Captain, Burjor

AU - Adams, Richard D.

AU - Alexeev, Oleg S.

AU - Amiridis, Michael D.

PY - 2011/4/1

Y1 - 2011/4/1

N2 - 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.

AB - 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.

KW - Bimetallic catalysts

KW - CO oxidation

KW - EXAFS

KW - Iron

KW - Platinum

UR - http://www.scopus.com/inward/record.url?scp=79953030036&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79953030036&partnerID=8YFLogxK

U2 - 10.1007/s11244-011-9665-2

DO - 10.1007/s11244-011-9665-2

M3 - Article

VL - 54

SP - 318

EP - 333

JO - Topics in Catalysis

JF - Topics in Catalysis

SN - 1022-5528

IS - 5-7

ER -