Porous metal article and about method for manufacturing same

Abstract

A porous metal article includes a substrate, a metal layer formed on the substrate, and a porous metal layer formed on the metal layer. The metal layer is a noble metal layer doped with M, M comprising an element selected from the group consisting of magnesium and calcium, the content of M in the metal layer is between about 30 wt % and about 70 wt %.

What is claimed is: 
     
         1 . A porous metal article, comprising:
 a substrate;   a metal layer formed on the substrate ; and   a porous noble metal layer formed on the metal layer;   wherein the metal layer comprises a noble metal and an element M, wherein M comprises an element selected from the group consisting of magnesium and calcium, the content of M in the metal layer is between about 30 wt % and about 70 wt %.   
     
     
         2 . The porous metal article as claimed in  claim 1 , wherein the porous metal layer defines a plurality of nano-pores, and each nano-pore has a pore opening size between about 50 nm and about 120 nm. 
     
     
         3 . The porous metal article as claimed in  claim 1 , wherein the metal layer has a thickness between about 1 micrometer and about 8 micrometers. 
     
     
         4 . The porous metal article as claimed in  claim 1 , wherein the noble metal is one element selected from the group consisting of ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, and gold. 
     
     
         5 . The porous metal article as claimed in  claim 1 , wherein the porous metal layer has a thickness between about 2 micrometers and about 4 micrometers. 
     
     
         6 . The porous metal article as claimed in  claim 1 , wherein the substrate is made of stainless steel or ceramic. 
     
     
         7 . The porous metal article as claimed in  claim 6 , wherein the ceramic is silicone carbide. 
     
     
         8 . The porous metal article as claimed in  claim 7 , wherein the stainless steel is type 304 stainless.