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Rationally design the nonprecious metal electrocatalysts to replace precious Pt-based catalysts is significantly important to boost the development of low cost fuel cells and metal-air batteries. Here, we propose a core/shell template strategy to synthesize nonprecious metal and nitrogen-doped porous carbons as efficient oxygen bifunctional electrocatalysts for Zn-air batteries. As a typical sample of the strategy, we use a ZnO@ZIF-67 core/shell nanoparticle (NP) as a self-sacrificed template and mix with additional nitrogen/carbon sources to synthesize Co/N-doped porous carbon catalysts. The resulting catalysts not only show almost similar activity with commercial 20 wt% Pt/C for oxygen reduction reaction  (ORR), but also exhibit comparable activity with IrO for oxygen evolution reaction (OER) in alkaline medium. We further use density functional 2

Core/shell Template-derived Co, N-doped Carbon Bifunctional Electrocatalysts for Rechargeable Zn-air Battery