Pt nanocrystals with high catalytic activities have been widely applied in many fields including fuel cells, electroanalysis and organic reaction catalysis [6]. Since Pt is a precious and rare metal, there is increasing demand for the preparation of highly active Ptbased catalysts. Many reports have proved that the incorporation of Pt with other materials, such as metal oxide, activated carbon and polymers, is one of the most attractive ways to achieve this goal [32,34]. Recently, much effort has been devoted to combining Pt nanostructures with graphene and its derivatives for enhancing their performance [79–94]. Most of the techniques that were used to prepare graphene–Au or Ag composites could also be applied to fabricate graphenetemplated
Pt nanomaterials [79–85]. For example, K2PtCl4, the most commonly used precursor, can be reduced on the surface of graphene to form Pt NPs via diversified approaches such as chemical
reduction, photochemical synthesis, microwave assisted synthesis, electroless metallization and thermal evaporation [86–94]. Recently, GO–Pt NP composite was produced by refluxing K2PtCl4 and GO in a water–ethylene glycol solution [48]. As an alternative approach, graphene–Pt nanocomposite films have been successfully prepared on conductive indium tin oxide (ITO) electrodes via the electrochemical synthetic method [86]. In another report, Pt nanoflowers loaded on rGO were prepared by a facile electrochemical approach [89]. Recently, our group also
reported the preparation of Pt NP-decorated rGO via photochemical reduction for sensing applications [79].