Co9S8 Nanoparticles Incorporated in Hierarchically Porous 3D Few‐Layer Graphene‐Like Carbon with S,N‐Doping as Superior Electrocatalyst for Oxygen Reduction Reaction

摘要: Electrochemical oxygen reduction reaction (ORR), using nonprecious metal catalysts, has attracted great attention due to the importance in renewable energy technologies, such as fuel cells and metal–air batteries. A simple scalable synthetic route is demonstrated for preparation of a novel 3D hybrid nanocatalyst consisting Co9S8 nanoparticles which are incorporated N,S-doped carbon (N, S–C) with rational structure design. In particular, catalyst prepared by direct pyrolysis calcination gel mixture Mg,Co nitrate-thiourea-glycine under Ar atmosphere, subsequent HCl washing. The properties obtained quite dependent on temperature added glycine amount. Under molar ratio Co5-Mg15-tu10-gl45 900 °C, embedded well-developed matrix shows porous few-layer graphene-like N, S–C open hierarchical micro–meso–macro pore structure. Because synergistic effect between support, composite exhibits high ORR activity close that commercial Pt/C catalyst. More importantly, displays superior long-term stability good tolerance against methanol. strategy developed here provides efficient approach prepare cost-effective highly active electrocatalyst.