The growth of platinum particle supported on an acetylene black was investigated fundamentally using a potential perturbation method in phosphoric acid at 205°C and atmospheric pressure. Platinum particles in a colony were agglomerated to form one particle depending on the potential of the electrode and number of particles in the colony. Platinum dissolution and redeposition were considered to be the main reasons for the agglomeration.
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Honji et al. (1988) studied this question.