Simultaneously Engineering the Synergistic-Effects and Coordination-Environment of Dual-Single-Atomic Iron/Cobalt-sites as a Bifunctional Oxygen Electrocatalyst for Rechargeable Zinc-Air Batteries

Single-atom introduced carbon nanomaterials show favorable oxygen-reduction reaction (ORR) and oxygen-evolution reaction (OER) performance for renewable energy applications. Nevertheless, the electronic-structure regulation by decorating heterogeneous single-metal-atoms and the engineering of a single-atom active-sites’ microenvironment need to be optimized simultaneously, which is challenging. Herein, we develop an atomic-interfacial-regulation approach to fabricate dual single Fe/Co atoms synchronized with both nitrogen/sulfur atoms on defective/graphitic/porous carbon nanosheets (Fe,Co/DSA-NSC). The unsymmetrically organized N and S coordinated Fe/Co bridged atomic-sites [Fe-(N2S)/Co-(N2S) moiety] are…

• NN
  National Natural Science Foundation of China

  Awards: 52150410410, 21972096
• ST
  Science, Technology and Innovation Commission of Shenzhen Municipality

  Award: JCYJ20190808150615285