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Green synthesis and catalytic properties of polyallylamine functionalized tetrahedral palladium nanocrystals

Paper ID Volume ID Publish Year Pages File Format Full-Text
46220 46435 2013 8 PDF Available
Title
Green synthesis and catalytic properties of polyallylamine functionalized tetrahedral palladium nanocrystals
Abstract

•Tetrahedral Pd nanocrystals are facilely synthesized through hydrothermal method.•Concavity of nanocrystals can be tuned by controlling the reaction parameters.•Pd nanocrystals have excellent colloidal stability and anti-oxidation capability.•Pd{1 1 0} exhibits superior catalytic activity to Pd{1 1 1} for hydrogenation reduction.

The water-soluble polyallylamine (PAH) functionalized tetrahedral palladium nanocrystals with adjustable size and concavity are successfully achieved through a one-pot hydrothermal synthesis. The size, morphology and surface composition of tetrahedral palladium nanocrystals are investigated by transmission electron microscopy (TEM), high angle annular dark field scanning TEM (HAADF-STEM), selected area electron diffraction (SAED), X-ray diffraction (XRD), fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS). The anchorage of PAH on palladium nanocrystals results in excellent colloidal stability and anti-oxidation capability of palladium nanocrystals. Both {1 1 0} and {1 1 1}-enclosed concave tetrahedral palladium nanocrystals (c-Pd-TNCs) exhibit superior catalytic activity to only {1 1 1}-enclosed flat tetrahedral palladium nanocrystals (f-Pd-TNCs) for the hydrogenation reduction of nitro functional groups and CN double bond.

Graphical abstractThe water-soluble polyallylamine functionalized tetrahedral palladium nanocrystals with adjustable size and concavity are successfully achieved through a facile one-pot hydrothermal synthesis. Due to the facet effect, the concave tetrahedral palladium nanocrystals exhibit much superior catalytic activity for the reduction of 4-nitrophenol to flat tetrahedral palladium nanocrystals.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Green synthesis; Polyallylamine; Palladium nanocrystals; Tetrahedra; Catalytic activity
First Page Preview
Green synthesis and catalytic properties of polyallylamine functionalized tetrahedral palladium nanocrystals
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 138–139, 17 July 2013, Pages 167–174
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis