{HEAD ~ A preferred intermetallic diffusion barrier} for use in the inventive method is {TAIL ~ noble metal eggshell catalyst} comprising zirconia stabilized with yttria, in particular zirconia stabilized with 6 to 8 wt % yttria 
is
{ HEAD ~ A preferred intermetallic diffusion barrier } for use in the inventive method is { TAIL ~ noble metal eggshell catalyst } comprising zirconia stabilized with yttria , in particular zirconia stabilized with 6 to 8 wt % yttria
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH