  Pt/Graphene and Pt/MnO2-Graphene catalysts have been prepared by
microwave-assisted polyol process. Electrochemical results show that
Pt/MnO2-Graphene has higher electrocatalytic activity and stability.
Furthermore, carbon riveted Pt/MnO2-Graphene catalyst has been designed and
synthesized on the basis of in situ carbonization of L-ascorbic acid. The
stability for carbon riveted Pt/MnO2-catalyst is significantly enhanced.
