Journal Article oxygen reduction reaction Review bifunctional electrocatalysts electrocatalysis noble-metal-free electrocatalysts zinc-air batteries 3D multiphase interfaces FeNC materials Published Erratum air cathodes aqueuous battery asymmetric air cathodes asymmetric architecture asymmetric interfaces bifunctional oxygen electrocatalysis carbon materials energy electrocatalysis framework porphyrin hydrogen peroxide electrosynthesis interfacial chemistry oxygen evolution reaction rechargeable Zn-air batteries rechargeable zinc-air batteries salt in water electrolyte single atom catalysts single-atom catalysts solid electrolyte interphase synergistic strategy water in salt electrolyte