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High-yield synthesis of PVP-stabilized small Pt clusters by microfluidic method

Paper ID Volume ID Publish Year Pages File Format Full-Text
55420 47052 2012 7 PDF Available
Title
High-yield synthesis of PVP-stabilized small Pt clusters by microfluidic method
Abstract

Monodisperse PVP-stabilized Pt nanoparticles (PtNPs) with an average diameter of 1.4 ± 0.3 nm were efficiently produced via the complete reduction of Pt4+ ions by BH4− in a micromixer. Because of microfluidic mixing, hydrolytic decomposition of BH4− by the PtNPs formed in the initial stage of the reaction was suppressed, and hence, the PtNP yield was higher than that in the conventional batch mixing. The results of various spectroscopic analyses including EXAFS, FTIR of CO and XPS revealed that the microfluidically synthesized PtNPs were negatively charged and had a high population of edges and vertices on their surface.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (204 K)Download as PowerPoint slideHighlight► Microfluidic method enhanced the yield of PtNPs. ► The PVP-stabilized PtNPs were small and monodisperse (1.4 ± 0.3 nm). ► The PVP-stabilized PtNPs were negatively charged. ► The PVP-stabilized PtNPs in water oxidized PhCH2OH selectively to PhCHO.

Keywords
PVP-stabilized Pt nanoparticles; Micromixer; Aerobic alcohol oxidation; Reusable catalyst
First Page Preview
High-yield synthesis of PVP-stabilized small Pt clusters by microfluidic method
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 183, Issue 1, 20 March 2012, Pages 101–107
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis