Hydrogen Reduction and Chlorine Oxidation Behaviors of Platinum Species between Graphite Interlayer Spaces

Platinum chloride (IV) was intercalated between graphite layers with third stage structure by the treatment of a mixture of platinum chloride and graphite powder under 0.3 MPa of chlorine at 723 K. Platinum chloride was reduced to platinum nanosheets with 1-3 nm thickness by the treatment of 40kPa of hydrogen at 573 K and the platinum nanosheets were oxidized to platinum chloride with third stage structure by the treatment of 0.3 MPa of chlorine at 723 K. The agglomeration to platinum nanosheets by hydrogen reduction and dispersion to platinum chloride by chlorine were reversible between graphite layers.