MOF-derived two-dimensional N-doped carbon nanosheets coupled with Co–Fe–P–Se as efficient bifunctional OER/ORR catalysts

• DOI: 10.1039/c9nr05744g
• Publication Date: 2019-10-01T03:27:00Z
• Authors: Hengbo Wu; Jie Wang; Ji Yan; Zexing Wu; Wei Jin
• Keywords: Carbon fibers

Developing highly efficient, low-cost and bifunctional electrocatalysts for the oxygen evolution reaction (OER) reduction (ORR) plays a pivotal role in scalable applications of zinc-air (Zn-air) batteries. Herein, Co-Fe-P-Se nanoparticles supported on two-dimensional nitrogen-doped carbon (Co-Fe-P-Se/NC) to construct three-dimensional nanostructure were obtained under assistance metal-organic frameworks (MOFs). The nanosheet facilitated electron transfer rate exposed abundant active sites. morphology composed nanosheets was favorable electrolyte transport provided channels gas diffusion during catalytic process. Moreover, coexistence Co Fe had important effects promoting performances. Lastly, performances OER ORR could be promoted effectively after introduction selenium phosphorous designed electrocatalyst. Benefiting from above merits, prepared Co-Fe-P-Se/NC exhibited excellent (overpotential 0.27 V at 10 mA cm-2), (half-wave potential 0.76 V) rechargeable batteries (a low voltage gap 0.719 V, high power density 104 mW cm-2 200 energy 805 W h KgZn-1). electrocatalyst possessed more stable long-term stability all conducted experiments. This work provides novel approach develop high-performance nanocatalysts metal-air