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US 8,524,364 B2Granted
Two-dimensional composite particle adapted for use as a catalyst and method of making same
AssigneeSouthwest Research Institute
InventorsJames H. Arps, Kent Edward Coulter
Life of this patent
Estimating the term…
Abstract
The present invention is directed to a composite particle that is microscopically two-dimensional with a third nanoscopic dimension, and to methods of making same. The particle may include a support and a metal layer. The metal layer may be catalytically active such that the particle is adapted to act as a catalyst.
Claims10
A composite particle, comprising:
- a support having a diameter up to about 150 microns and a thickness in the range from about 50 nm to about 1 micron;
- and
- a first metal layer disposed on said support and a second metal layer disposed on said support opposite said first metal layer, said metal layers each having a thickness in the range of from about atomic thickness to about 10 nm, wherein said metal layers are catalytically active and disposed on said support layer in discontinuous islands having a diameter between about 0.1nm to about 5.0 nm, wherein said islands include edge sites that are uncoordinated and a portion of said islands are isolated and a portion have a connectivity above a percolation threshold of said islands and wherein said islands are positioned on an exposed support surface segments.
A method for nanocatalytic enhancement comprising:
- providing a composite particle, including a support having a diameter up to about 150 microns and a thickness in the range from about 50 nm to about 1 micron and a first metal layer disposed on said support and a second metal layer disposed on said support opposite said first metal layer, said metal layers each having a thickness in the range of from about atomic thickness to about 10 nm, wherein said metal layers are catalytically active and disposed on said support layer in discontinuous islands having a diameter between about 0.1 nm to about 5.0 nm, wherein said islands include edge sites that are uncoordinated and a portion of said islands are isolated and a portion have a connectivity above a percolation threshold of said islands and wherein said islands are positioned on an exposed support surface segments,
- introducing said composite particle to a process requiring catalysis.
Dependencies are inferred from the claim text.