Thermally stable nanoparticles on supports
First Claim
1. A supported catalyst, comprising:
- a support comprising a nanocrystalline powder, a thin film, or a single crystal;
a plurality of metal nanoparticles having a median size from 0.5 nm to 25 nm, a size distribution having a standard deviation ≦
0.1 of said median size on or embedded in said support, said plurality of metal nanoparticles being dispersed from one another and positioned in a periodic arrangement.
2 Assignments
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Accused Products
Abstract
An inverse micelle-based method for forming nanoparticles on supports includes dissolving a polymeric material in a solvent to provide a micelle solution. A nanoparticle source is dissolved in the micelle solution. A plurality of micelles having a nanoparticle in their core and an outer polymeric coating layer are formed in the micelle solution. The micelles are applied to a support. The polymeric coating layer is then removed from the micelles to expose the nanoparticles. A supported catalyst includes a nanocrystalline powder, thin film, or single crystal support. Metal nanoparticles having a median size from 0.5 nm to 25 nm, a size distribution having a standard deviation ≦0.1 of their median size are on or embedded in the support. The plurality of metal nanoparticles are dispersed and in a periodic arrangement. The metal nanoparticles maintain their periodic arrangement and size distribution following heat treatments of at least 1,000° C.
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Citations
12 Claims
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1. A supported catalyst, comprising:
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a support comprising a nanocrystalline powder, a thin film, or a single crystal; a plurality of metal nanoparticles having a median size from 0.5 nm to 25 nm, a size distribution having a standard deviation ≦
0.1 of said median size on or embedded in said support, said plurality of metal nanoparticles being dispersed from one another and positioned in a periodic arrangement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A supported catalyst, comprising:
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a support comprising an oxide thin film, or a single crystal having an oxide surface; a plurality of metal nanoparticles comprising Pt or Pd having a median size from 0.5 nm to 5 nm, a size distribution having a standard deviation ≦
0.1 of said median size on or embedded in said support, said plurality of metal nanoparticles being dispersed from one another and positioned in a periodic arrangement. - View Dependent Claims (10, 11, 12)
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Specification