Recently an improved version of a thermodynamic description of solid mixtures
has been developed and shown to give good agreement with experimental results
for low-index surfaces of PtNi and PtCo alloys.
Here we present calculated concentration profiles for low-index PtRh surfaces (for T=1120K), again in good agreement with available experimental results. Different from the situation of PtNi or PtCo, thermodynamic data on the mixing behaviour of PtRh are missing. Therefore the calculations are extended here to estimate these data.
Corresponding author: W. Hofer (hofer).