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

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.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
EE; USDOE Office of Science (SC)
OSTI Identifier:
989078
Report Number(s):
ANL/ES/JA-67286
Journal ID: 1530-6984; TRN: US201019%%272
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Nano Lett.
Additional Journal Information:
Journal Volume: 10; Journal Issue: 8 ; Aug. 2010
Country of Publication:
United States
Language:
ENGLISH
Subject:
10 SYNTHETIC FUELS; 36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; CATALYSIS; CATALYSTS; CRYSTAL STRUCTURE; DEPOSITION; FLUORESCENCE; METHANOL; MIXTURES; NANOSTRUCTURES; OXYGEN; PLATINUM; PRECURSOR; RUTHENIUM; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Christensen, S T, Feng, H, Libera, J L, Guo, N, Miller, J T, Stair, P C, and Elam, J W. Supported Ru-Pt bimetallic nanoparticle catalysts prepared by atomic layer deposition.. United States: N. p., 2010. Web. doi:10.1021/nl101567m.
Christensen, S T, Feng, H, Libera, J L, Guo, N, Miller, J T, Stair, P C, & Elam, J W. Supported Ru-Pt bimetallic nanoparticle catalysts prepared by atomic layer deposition.. United States. doi:10.1021/nl101567m.
Christensen, S T, Feng, H, Libera, J L, Guo, N, Miller, J T, Stair, P C, and Elam, J W. Sun . "Supported Ru-Pt bimetallic nanoparticle catalysts prepared by atomic layer deposition.". United States. doi:10.1021/nl101567m.
@article{osti_989078,
title = {Supported Ru-Pt bimetallic nanoparticle catalysts prepared by atomic layer deposition.},
author = {Christensen, S T and Feng, H and Libera, J L and Guo, N and Miller, J T and Stair, P C and Elam, J W},
abstractNote = {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.},
doi = {10.1021/nl101567m},
journal = {Nano Lett.},
number = 8 ; Aug. 2010,
volume = 10,
place = {United States},
year = {2010},
month = {8}
}