Adsorption protocols colloidal particles

The simulation protocol for the formation of Pt-decorated primary C particles (PPCs) mimics catalyst dispersions obtained by pertinent fabrication techniques. In practice, two methods are used to obtain PPCs (1) impregnation of carbon nanoparticles with Pt precursor or (2) adsorption of Pt oxide or Pt metal colloids onto the carbon surface (Antolini, 2003 Antolini et al., 2002). In the case of impregnation with Pt precursor, diffusion into the pores of each individual support particle can occur. For the second mechanism, colloidal Pt or Pt oxide particles adsorb on the external surface of the support particles as a result of size exclusion, the accessibility of the inner pores is limited and, therefore, Pt particles are mostly formed on the surface of CNPs. 

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