Supported Ru-Pt bimetallic nanoparticle catalysts prepared by atomic layer deposition.
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.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- EE; SC
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 989078
- Report Number(s):
- ANL/ES/JA-67286
- Journal Information:
- Nano Lett., Journal Name: Nano Lett. Journal Issue: 8 ; Aug. 2010 Vol. 10; ISSN 1530-6984
- Country of Publication:
- United States
- Language:
- ENGLISH
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