Abstract
The nucleation of Pt particles from CH3CpPt(CH3)3 on boron-treated highly oriented pyrolytic graphite (HOPG) was investigated. HOPG was enhanced with B from diborane using hot wire chemical vapor deposition to generate BDx fragments that dissociatively adsorbed on the HOPG surface and subsequently reacted with the sp2 C lattice. Unreacted BDx fragments either reacted with the HOPG or desorbed during annealing. Pt was deposited using chemical vapor deposition. Platinized B-treated HOPG samples exhibited enhanced Pt dispersion and uniform nucleation as compared with cleaved and annealed HOPG samples. Pt particle density is shown to be tunable using varying B exposures. This study demonstrates that the optimization of Pt dispersion and adhesion to HOPG substrates is achievable using a scalable chemical enhancement method.
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