Electrocatalytic Activity and Stability of 3D Ordered N-doped Hierarchically Porous Carbon Supported Pt Catalyst for Methanol Oxidation and Oxygen Reduction Reactions

Herein, nitrogen-doped ordered hierarchical porous carbon (N-OHPC) is fabricated via a templating method by applying silica colloidal crystal as template and polypyrrole (PPy) as carbon source. The as-prepared N-OHPC possesses ordered interconnected macropores, rich mesopores and large BET surface area (825.6 m(2) g(-1)). Pt/N-OHPC is then prepared by depositing Pt nanoparticles (19.3 wt%) on N-OHPC as catalyst towards methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR). The Pt/N-OHPC containing small and uniform Pt nanoparticles (similar to 1.7 nm) exhibits good electrocatalytic performance and better durability for MOR and ORR than the commercial Pt/C catalyst.