Metallic cobalt encapsulated in N-doped carbon nanowires: a highly active bifunctional catalyst for oxygen reduction and evolution

作者：Wang, Qingqing; Gao, Xiaohong; Li, Xiaobao; You, Chenghang^*; Wang, Chongtai^*; Liao, Shijun

来源：IONICS, 2021, 27(8): 3501-3509.

DOI：10.1007/s11581-021-04119-5

• Fuel cells
• Batteries
• Charging
• discharging

N-doped carbon nanowires encapsulated with cobalt nanoparticles are designed and fabricated through solvothermal and pyrolysis procedures by using cobalt chloride and nitrilotriacetic acid as the precursors. The catalyst (C-NTACo-500) demonstrated great potential as highly active bifunctional catalyst for oxygen reduction and oxygen evolution reactions (ORR and OER), with a half wave potential (E-1/2) of 0.84 V (vs. RHE) for ORR, and a small overpotential of 0.28 V for OER. Notably, it could provide zinc air batteries (ZAB) a maximum power density of 203.4 mW cm(-2), and a high specific capacity of 822.4 mAh g(Zn)(-1), as well as excellent charge-discharge stability.

• 单位
  海南师范大学