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Isolated single atomic sites coordinated with nitrogen on carbon supports (M\u2010N\u2010C) have promising performance for replacement of precious metal catalysts. However, most of monometallic M\u2010N\u2010C catalysts demonstrate unsatisfactory bifunctional performance. Herein, a facile way of preparing bimetallic Fe and Co sites entrapped in nitrogen\u2010doped hollow carbon nanospheres (Fe,Co\u2010SA\/CS) is explored, drawing on the unique structure and pore characteristics of Zeolitic imidazole frameworks and molecular size of Ferrocene, an Fe containing species. Fe,Co\u2010SA\/CS showed an ORR onset potential and half wave potential of 0.96 and 0.86 V, respectively. For OER, (Fe,Co)\u2010SA\/CS attained its anodic current density of 10 mA cm<jats:sup>\u20132<\/jats:sup> at an overpotential of 360 mV. Interestingly, the oxygen electrode activity (\u0394<jats:italic>E<\/jats:italic>) for (Fe,Co)\u2010SA\/CS and commercial Pt\/C\u2010RuO<jats:sub>2<\/jats:sub> is calculated to be 0.73 V, exhibiting the bifunctional catalytic activity of (Fe,Co)\u2010SA\/CS. (Fe,Co)\u2010SA\/CS evidenced desirable specific capacity and cyclic stability than Pt\/C\u2010RuO2 mixture when utilized as an air cathode in a homemade Zinc\u2010air battery.<\/jats:p>","DOI":"10.1002\/smtd.202000751","type":"journal-article","created":{"date-parts":[[2020,10,9]],"date-time":"2020-10-09T16:52:54Z","timestamp":1602262374000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":232,"title":["Modulation of Single Atomic Co and Fe Sites on Hollow Carbon Nanospheres as Oxygen Electrodes for Rechargeable Zn\u2013Air Batteries"],"prefix":"10.1002","volume":"5","author":[{"given":"Vishal","family":"Jose","sequence":"first","affiliation":[{"name":"Energy Research Institute @ NTU ERI@N Interdisciplinary Graduate School Nanyang Technological University  50 Nanyang Drive Singapore 637553 Singapore"},{"name":"School of Chemical and Biomedical Engineering Nanyang Technological University  62 Nanyang Drive Singapore 637459 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