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SCIENTIA SINICA Chimica, Volume 41, Issue 8: 1366-1371(2011) https://doi.org/10.1360/032011-174

High-intensity sonication-assisted synthesis of supported noble metal nanocatalysts

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  • AcceptedMay 22, 2011
  • PublishedAug 4, 2011

Abstract

We demonstrate a high-intensity sonication route to the synthesis of supported noble metal catalytic materials. The in situ produced metal or bimetal nanoparticles from the reduction of precursor using NaBH4 were uniformly deposited onto a variety of supports, such as graphene, carbon nanotubes, metal oxides (cerium oxide, hematite, titanium oxide), with the aid of ultrasound. The as-prepared catalysts were characterized in detail by means of X-ray photoelectron spectroscopy, transmission electron microscope, energy-dispersive X-ray spectrometer, and selected-area electron diffraction. It was observed that the metal nanoparticles with small sizes and narrow diameter distributions were highly distributed on the surfaces of the supports. In addition, the size of the particles could be readily tuned by manipulating the processing parameters including the metal loading level, the precursor concentration and the amplitude of the sonic power. Of particular interest is that this method offers an effective strategy to preparing supported noble metal nanocatalysts.


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