Advanced Functional Materials · 2007 · 185 citations · 32 references
Natural SciencesChemistryMaterials ScienceCatalysisNanomaterialsNanotechnologyCatalyst CharacterizationCatalyst PreparationCatalytic MaterialsNanocatalysisNanomaterial CharacterizationSupported CatalystsCatalytic NanomaterialsCatalytic NanoparticlesCo OxidationNanoparticle CatalysisNanoparticle CatalystsNanoparticlesNanostructured CatalystsOxidation
Abstract Colloidal suspensions of AuPt alloy nanoparticles (NPs) were prepared by using a rapid butyllithium reduction of Au 3+ and Pt 4+ precursors in oleylamine. The resulting 2.5 nm (av) particles were characterized by TEM with EDX, XRD, XPS and UV‐vis spectroscopy. With less butyllithium, nanowires are formed from fused NPs and grow to 100 nm in length. The activities of three different AuPt NP architectures (alloy, contact aggregate and monometallic NPs) were evaluated for catalytic hydrogen oxidation in CO‐contaminated fuel streams (1.0 % Pt loadings in Al 2 O 3 supports). The alloy catalyst showed superior H 2 and CO oxidation activity, was unaffected by iron promoters and appears to operate by a different mechanism. The heteroaggregate showed a marked improvement in activity with iron promoters and is more selective for CO oxidation.
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Monodisperse FePt Nanoparticles and Ferromagnetic FePt Nanocrystal Superlattices
Shouheng Sun, C. B. Murray, D. Weller et al. · Science · 2000 · 6.1K citations
Stabilization of Platinum Oxygen-Reduction Electrocatalysts Using Gold Clusters
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