Core Shell Catalyst
AssigneeUniversity of Utah Research Foundation
InventorAnil V. Virkar
Life of this patent
Estimating the term…
Abstract
A core-shell catalyst material can include a core and a shell material. Each of the core material and the shell material can have crystal structures and lattice parameters which allow for a substantially coherent core-shell interface. The shell material can include a catalytically active metal. The circumferential stress of the shell material, Gee, at the core-shell interface and at the shell surface, is greater than 0 (tensile) or can be compressive of a lower magnitude than a catalyst made of the shell material alone. The crystal structures of the core material can often be the same as the shell material, although this is not always required.
Claims23
A core-shell catalyst material, comprising:
- a core material having a core crystal structure;
- and
- a shell material encompassing and attached to the core material at a core-shell interface, said shell material comprising a catalytically active material, wherein a circumferential stress of the shell material, σθθ, at the core-shell interface, is greater than 0 (tensile) or compressive of a lower magnitude than a catalyst material formed solely of the shell material.
A method of making a core-shell catalyst, comprising:
- selecting a core material having a core material lattice and a shell material having a shell material lattice, wherein the core material lattice and the shell material lattice are similar enough to form a coherent interface;
- forming a core of the core material;
- and
- forming a shell of the shell material encompassing and attached to the core such that the shell material is under tensile stress or a compressive stress of a lower magnitude than a catalyst material of common dimensions as the core-shell catalyst and made solely of the shell material.
Dependencies are inferred from the claim text.