Pt-containing meta- and para-linked
poly(phenyleneethynylene)s were synthesized by the dehydrochlorination
coupling polymerization of PtCl2(PBu3)2 with m- and p-diethynylbenzenes.
The formed polymers were sintered at 900 °C to obtain Pt–graphene
hybrids, whose structures were examined by Raman scattering spectroscopy,
X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD)
measurements. Shapesfacets, terraces, and stepswith
average diameters of 2.0–3.4 μm were observed by field
emission scanning electron microscopy (FE-SEM). The Pt–graphene
hybrids moderately adsorbed CO2 and O2 and slightly
adsorbed ethylene and methane. Epoxidation of stilbene was carried
out using Pt–graphene hybrids as catalysts to obtain stilbene
oxide.