Orthogonal Design of Fe−N ₄ Active Sites and Hierarchical Porosity in Hydrazine Oxidation Electrocatalysts

Hydrazine is a promising energy-dense fuel for alkaline cells. To design efficient and affordable electrocatalysts the hydrazine oxidation reaction (HzOR), one needs to control both active site supporting scaffold. We now report family of HzOR, consisting atomically dispersed Fe−N4 sites (as iron corroles varying sizes) on hierarchically porous, electronically conductive carbon scaffolds that were prepared by self-templating from novel barium-based precursor. The orthogonal flow-enhancing allowed rational optimization their combination, achieve excellent HzOR activity. These catalysts demonstrate utility versatility metallocorroles electrocatalysis in nitrogen cycle, as well importance pore tuning current density.