As for the noble metal eggshell catalyst that may suitably be used as a layer of intermetallic diffusion barrier particles that is applied to {HEAD ~ the surface} of {TAIL ~ the porous substrate}, the noble metal eggshell catalyst is defined and described in great detail in U.S. Pat 
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As for the noble metal eggshell catalyst that may suitably be used as a layer of intermetallic diffusion barrier particles that is applied to { HEAD ~ the surface } of { TAIL ~ the porous substrate } , the noble metal eggshell catalyst is defined and described in great detail in U.S. Pat
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH