Journal ArticleDOI
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,Peter C. Stair,Jeffrey W. Elam +7 more
TLDR
The results demonstrate that ALD is a viable technique for synthesizing mixed-metal nanostructures suitable for catalysis and other applications.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 synthe...read more
Citations
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Crystallinity of inorganic films grown by atomic layer deposition: Overview and general trends
TL;DR: Puurunen et al. as discussed by the authors summarized the two-reactant ALD processes to grow inorganic materials developed to-date, updating the information of an earlier review on ALD.
Journal ArticleDOI
Recent Developments in the Synthesis of Supported Catalysts
Journal ArticleDOI
Catalyst Design with Atomic Layer Deposition
Brandon J. O'Neill,Brandon J. O'Neill,David H. K. Jackson,Jechan Lee,Christian P. Canlas,Peter C. Stair,Christopher L. Marshall,Jeffrey W. Elam,Thomas F. Kuech,James A. Dumesic,George W. Huber +10 more
TL;DR: Atomic layer deposition (ALD) has emerged as an interesting tool for the atomically precise design and synthesis of catalytic materials as mentioned in this paper, which can be used to elucidate reaction mechanisms and catalyst structure-property relationships by creating materials with a controlled distribution of size, composition, and active site.
Journal ArticleDOI
Nanostructured materials for applications in heterogeneous catalysis
TL;DR: This review considers the mixed molecular-nanostructure approach that can be used to develop more demanding catalytic sites, by derivatizing the surface of solids or tethering or immobilizing homogeneous catalysts or other chemical functionalities.
Journal ArticleDOI
Synergistic Catalysis over Bimetallic Alloy Nanoparticles
Ashish Kumar Singh,Qiang Xu +1 more
TL;DR: In this paper, the authors survey the research progress on the synergistic effect of bimetallic alloy NPs for catalytic reactions related to fuel cells, such as the electrochemical oxidation of MeOH, EtOH, and formic acid, CO oxidation, the oxygen-reduction reaction, and the dehydrogenation of ammonia borane.
References
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Journal ArticleDOI
Ru-Pt core-shell nanoparticles for preferential oxidation of carbon monoxide in hydrogen.
TL;DR: Density functional theory studies suggest that the enhanced catalytic activity for the core-shell nanoparticle originates from a combination of an increased availability of CO-free Pt surface sites on the Ru@Pt nanoparticles and a hydrogen-mediated low-temperature CO oxidation process that is clearly distinct from the traditional bifunctional CO oxidation mechanism.
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Fuel Cells: Principles, Types, Fuels, and Applications
TL;DR: The environmental and social factors promoting fuel cell development are discussed, with an emphasis on the advantages of fuel cells compared to the conventional techniques, and attention is given to the integration of the fuel cells into complete systems.
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Conformal Coating on Ultrahigh-Aspect-Ratio Nanopores of Anodic Alumina by Atomic Layer Deposition
TL;DR: In this paper, anodic alumina (AA) membranes were coated with Al2O3 and ZnO ALD films and subsequently analyzed using cross-sectional scanning electron microscopy (SEM) and electron probe microanalysis (EPMA).
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Viscous flow reactor with quartz crystal microbalance for thin film growth by atomic layer deposition
TL;DR: In this paper, a chemical reactor was constructed for growing thin films using atomic layer deposition (ALD) techniques, which utilizes a viscous flow of inert carrier gas to transport the reactants to the sample substrates and to sweep the unused reactants and reaction products out of the reaction zone.