Nano-dispersed catalysts particles
First Claim
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1. A catalyst comprising dispersed powder comprising:
- a sub-micron carrier particle having a first composition; and
nanoscale particles of a second composition that are dispersed on and attached to surface of the carrier particle in a mechanically stable state, wherein the attached particles are smaller than the carrier particle and wherein at least two neighboring attached particles on the surface of said carrier particle do not touch each other at 300 Kelvin.
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Abstract
Catalyst powders from nanoscale powders dispersed on coarser carrier powders. The composition of the dispersed fine powders may be oxides, carbides, nitrides, borides, chalcogenides, metals, and alloys. Nano-dispersed submicron powders and nano-dispersed nanopowders are discussed.
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Citations
18 Claims
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1. A catalyst comprising dispersed powder comprising:
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a sub-micron carrier particle having a first composition; and
nanoscale particles of a second composition that are dispersed on and attached to surface of the carrier particle in a mechanically stable state, wherein the attached particles are smaller than the carrier particle and wherein at least two neighboring attached particles on the surface of said carrier particle do not touch each other at 300 Kelvin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A catalyst comprising dispersed powder comprising:
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a carrier particle having a first composition;
nanoscale particles of a second composition that are dispersed on and attached to the surface of the carrier particle in a mechanically stable state, wherein the attached particles are smaller than the carrier particle and wherein at least two neighboring attached particles on the surface of said carrier particle do not touch each other at 300 Kelvin;
wherein the carrier particles comprise particles with a size less than 500 nanometers;
wherein the dispersed particles comprise particles with a size less than 100 nanometers;
wherein the first composition is selected from the group consisting of oxides, chalcogenides, borides, carbide, nitrides, metals, alloys and polymers, wherein the second composition comprises a catalyst powder; and
wherein the dispersed powder prepared from the carrier particles and the dispersed particles exhibits a useful life that is 10% or more longer than catalytic materials prepared from non-dispersed powders of equivalent composition. - View Dependent Claims (18)
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Specification