The powder x-ray diffraction (PXRD) pattern shows the input of Pt (or Pt-based solid solution) reflections to the main picture (Reference, e.g. A.A.Alekseenko et al. Inorganic Materials, 2015), including semi-amorphous carbon's peaks (Vulcan-XC72). The reflections broadening during a thermal treatment will show the agglomeration process, the average coherent domain size is increasing. References: Kim, D.-S. J. of Catalysis, 2012 and M.Chi et al. Nature Comm., 2015.