Coated catalytic material with a metal phase in contact with a grain boundary oxide
An industrial catalyst having: a support; a plurality of metallic particulates distributed throughout the support; and a metal at least partially covering the surface of the support. A method for making a catalyst including the steps of: forming a support with non-noble metal particulates distributed throughout the support; and at least partially covering the surface of the support with a metal.
1. A catalyst comprising:
a support having internal pores, said support including a bulk alloy and a grain boundary oxide adjacent to the bulk alloy;
a plurality of finely divided metallic particulates distributed in said support; and
a metal at least partially covering the surface of said support that penetrates and branches into said support and resides within the internal pores, said metal including a metal chase in contact with said grain boundary oxide.
2. The catalyst of claim 1 , wherein the support includes a multicomponent, metastable oxide.
3. The catalyst of claim 1 , wherein said finely divided metal particles distributed in the support are 150 angstroms or less in size.
4. The catalyst of claim 1 , wherein said finely divided metal particles distributed in said support include non-noble metal particulates that are 150 angstroms or less in diameter.
5. The catalyst of claim 1 , wherein said finely divided metallic particulates in said support include non-noble metal particulates that are 100 angstroms or less in diameter.
6. The catalyst of claim 1 , wherein said finely divided metallic particulates at least partially cover the surface of said support.
7. The catalyst of claim 1 , wherein said metal at least partially covering the surface of the support that penetrates and branches into the support and resides within the internal pores includes nickel, cobalt, or copper.
8. The catalyst of claim 6 , wherein said metal at least partially covering the surface of the support that penetrates and branches into said support and resides within the internal pores said support is between 0 and 20 wt % of the catalyst.
9. The catalyst of claim 1 , wherein said support includes a preferentially corroded surface.
10. The catalyst of claim 1 , wherein said plurality of finely divided metallic particulates are distributed in said support as catalytic clouds.
11. The catalyst of claim 1 , wherein said catalyst is permeable to the diffusion and transport of hydrogen.
12. The catalyst of claim 1 , wherein said plurality of finely divided metallic particulates distributed in said support are native to said support.
13. The catalyst of claim 1 , wherein said plurality of finely divided metallic particulates distributed in said support include particulates that are embedded within said support and below the surface of said support.
14. The catalyst of claim 1 , wherein said finely divided metallic particulates are a mixture of particles with different compositions, the particles being an alloy of two or more metals.