Supported Ru-Pt bimetallic nanoparticle catalysts prepared by atomic layer deposition

Steven T. Christensen, Hao Feng, Joseph L. Libera, Neng Guo, Jeffrey T. Miller, Peter C Stair, Jeffrey W. Elam

Research output: Contribution to journalArticle

153 Citations (Scopus)

Abstract

Atomic layer deposition (ALD) is used to deposit ruthenium-platinum nanostructured catalysts using 2,4-(dimethylpentadienyl)(ethylcyclopentadienyl) ruthenium, trimethyl(methylcyclopentadienyl) platinum, and oxygen as precursors. Transmission electron microscopy shows discrete 1.2 nm nanoparticles decorating the surface of the spherical alumina support. The Ru-Pt particles are crystalline and have a crystal structure similar to pure platinum. X-ray fluorescence measurements show that the nanoparticle composition is controlled by the ratio of metal precursor ALD cycles. X-ray absorption spectroscopy at the Ru K-edge indicates a nearest neighbor Ru-Pt interaction consistent with a bimetallic composition. Methanol decomposition reactions further confirm a Ru-Pt interaction and show enhanced methanol conversion for the bimetallic nanoparticles when compared to catalysts comprised of a mixture of pure Pt and Ru nanoparticles of similar loading. These results demonstrate that ALD is a viable technique for synthesizing mixed-metal nanostructures suitable for catalysis and other applications.

Original languageEnglish
Pages (from-to)3047-3051
Number of pages5
JournalNano Letters
Volume10
Issue number8
DOIs
Publication statusPublished - Aug 11 2010

Fingerprint

Atomic layer deposition
atomic layer epitaxy
Platinum
Nanoparticles
catalysts
nanoparticles
Catalysts
platinum
Ruthenium
ruthenium
Methanol
methyl alcohol
Metals
X ray absorption spectroscopy
Aluminum Oxide
Chemical analysis
metals
Catalysis
catalysis
Nanostructures

Keywords

  • Atomic layer deposition
  • bimetallic catalysts
  • platinum
  • ruthenium

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

Cite this

Christensen, S. T., Feng, H., Libera, J. L., Guo, N., Miller, J. T., Stair, P. C., & Elam, J. W. (2010). Supported Ru-Pt bimetallic nanoparticle catalysts prepared by atomic layer deposition. Nano Letters, 10(8), 3047-3051. https://doi.org/10.1021/nl101567m

Supported Ru-Pt bimetallic nanoparticle catalysts prepared by atomic layer deposition. / Christensen, Steven T.; Feng, Hao; Libera, Joseph L.; Guo, Neng; Miller, Jeffrey T.; Stair, Peter C; Elam, Jeffrey W.

In: Nano Letters, Vol. 10, No. 8, 11.08.2010, p. 3047-3051.

Research output: Contribution to journalArticle

Christensen, ST, Feng, H, Libera, JL, Guo, N, Miller, JT, Stair, PC & Elam, JW 2010, 'Supported Ru-Pt bimetallic nanoparticle catalysts prepared by atomic layer deposition', Nano Letters, vol. 10, no. 8, pp. 3047-3051. https://doi.org/10.1021/nl101567m
Christensen, Steven T. ; Feng, Hao ; Libera, Joseph L. ; Guo, Neng ; Miller, Jeffrey T. ; Stair, Peter C ; Elam, Jeffrey W. / Supported Ru-Pt bimetallic nanoparticle catalysts prepared by atomic layer deposition. In: Nano Letters. 2010 ; Vol. 10, No. 8. pp. 3047-3051.
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