Hierarchically porous N-doped carbon nanosheets with atomically dispersed Fe/Co dual-metallic sites for efficient and robust oxygen electrocatalysis in Zn–air batteries

Abstract

Design and synthesis of non-precious-metal single-atom catalysts with favorable coordination environments and abundant accessible active sites to boost the sluggish oxygen reduction reactions (ORRs) is highly desirable for both fuel...

Protruding N-doped carbon nanotubes on elongated hexagonal Co–N–C nanoplates as bifunctional oxygen electrocatalysts for Zn–air batteries

“…[2][3][4][5][6][7] However, the large-scale applications of rechargeable ZABs were impeded by the sluggish oxygen evolution reaction (OER) kinetics and insufficient oxygen reduction reaction (ORR) activity, stemming from the multi-step and multi-electron redox chemistry during the charge-discharge process. [8][9][10][11] Therefore, developing efficient bifunctional oxygen electrocatalysts to accelerate the sluggish OER/ORR kinetics is imminent. 12,13 In the oxygen electrocatalytic field, precious group metals (PGMs) are widely utilized as electrocatalysts, mainly incorporating Pt based ORR catalysts and Ir/Ru based OER catalysts.…”