Developing　asymmetric　heteronuclear　dual-atom　catalysts　(DACs)　through　coordination　microenvironment　regulation　and　investigating　their　structure-activity　relationship　for　the　catalytic　oxygen　reduction　reaction　(ORR)　are　crucial　for　energy　conversion　and　storage　devices　such　as　zinc-air　batteries　(ZABs).　In　this　work,　a　novel　catalyst　with　its　Fe　and　Zn　diatomic　sites　atomically　dispersed　on　nitrogen-doped　hierarchical　porous　carbon　(FeZn-NC-800)　was　designed　and　synthesized　under　a　cyanamide-assisted　sintering　atmosphere　to　stabilize　Zn　single　atoms　in　the　structure.　Benefiting　from　specific　synergy　between　the　Fe　and　Zn　atoms　and　the　hierarchical　porous　carbon　substrate,　the　obtained　FeZn-NC-800　catalyst　exhibits　remarkable　ORR　performance　with　a　positive　half-wave　potential　of　0.89　V　and　good　durability,　outstripping　the　performance　of　most　state-of-the-art　catalysts　and　commercial　precious　metal　catalysts.　Moreover,　the　ZABs　assembled　with　the　FeZn-NC-800　cathodes　exhibit　an　excellent　peak　power　density　of　218.6　mW　cm−2　and　achieve　stable　cycling　for　over　200　hours　at　a　current　density　of　10　mA　cm−2.　This　study　provides　a　fresh　new　insight　into　the　development　of　stable　and　highly　active　DAC　materials,　advancing　the　design　of　next-generation　energy　technologies.　©　2025　The　Royal　Society　of　Chemistry.