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Issue 8, 2015
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Fabrication of hollow Cu2O@CuO-supported Au–Pd alloy nanoparticles with high catalytic activity through the galvanic replacement reaction

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Abstract

We report the synthesis of unique Au–Pd bimetallic alloy nanoparticles (NPs) supported on a hollow Cu2O–CuO core–shell heterostructure via the galvanic replacement method, which represents the first example of Au–Pd alloy nanoparticles immobilized on hollow Cu2O@CuO nanocubes. The morphological evolution can be controlled by the reaction time. The morphology, composition, and structure of the as-prepared Cu2O@CuO/(Au–Pd) material are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), elemental analysis (EDS) and inductively coupled plasma atomic emission spectroscopy (ICP-AES). The size of the Au–Pd bimetallic NPs deposited onto the Cu2O@CuO nanocubes is ca. 15 nm. These bimetallic NPs showed a high catalytic activity towards the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in water at room temperature. Significantly, the strong synergistic effect between Au and Pd, and the high specific surface area of Cu2O@CuO enhance the catalytic efficiency. The catalytic system can be reused for several cycles without any obvious decay of the catalytic efficiency.

Graphical abstract: Fabrication of hollow Cu2O@CuO-supported Au–Pd alloy nanoparticles with high catalytic activity through the galvanic replacement reaction

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Publication details

The article was received on 22 Nov 2014, accepted on 08 Jan 2015 and first published on 08 Jan 2015


Article type: Paper
DOI: 10.1039/C4TA06378C
Citation: J. Mater. Chem. A, 2015,3, 4578-4585
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    Fabrication of hollow Cu2O@CuO-supported Au–Pd alloy nanoparticles with high catalytic activity through the galvanic replacement reaction

    W. Yao, F. Li, H. Li and J. Lang, J. Mater. Chem. A, 2015, 3, 4578
    DOI: 10.1039/C4TA06378C

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