Microfluidic Synthesis and Catalytic Application of PVP-Stabilized, ∼1 nm Gold Clusters

Small PVP-stabilized gold clusters were successfully prepared by the homogeneous mixing of continuous flows of aqueous AuCl4 − and BH4 − in a micromixer. Spectroscopic characterization revealed that microfluidic synthesis could yield monodisperse Au:PVP clusters with an average diameter of ∼1 nm, wh...

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Bibliographic Details
Published in:Langmuir 2008-10, Vol.24 (20), p.11327-11330
Main Authors: Tsunoyama, Hironori, Ichikuni, Nobuyuki, Tsukuda, Tatsuya
Format: Article
Language:English
Subjects:
Catalysis
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Surface physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:Small PVP-stabilized gold clusters were successfully prepared by the homogeneous mixing of continuous flows of aqueous AuCl4 − and BH4 − in a micromixer. Spectroscopic characterization revealed that microfluidic synthesis could yield monodisperse Au:PVP clusters with an average diameter of ∼1 nm, which is smaller than clusters produced by conventional batch methods. These ∼1 nm Au:PVP clusters exhibited higher catalytic activity for the aerobic oxidation of p-hydroxybenzyl alcohol than did Au:PVP clusters prepared by batch methods.
ISSN:0743-7463
1520-5827
DOI:10.1021/la801372j