首页|Fe-doped (Ni,Mn)Co2O4 nanorod arrays on Ni foam as highly efficient electrocatalyst for oxygen evolution reaction in alkaline and neutral conditions with superb long-term stability
Fe-doped (Ni,Mn)Co2O4 nanorod arrays on Ni foam as highly efficient electrocatalyst for oxygen evolution reaction in alkaline and neutral conditions with superb long-term stability
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NSTL
Elsevier
? 2022 Elsevier B.V.It is drawing increased interest to exploit highly active and durable electrocatalysts based on earth-abundant elements for oxygen evolution reaction (OER). In this work, we successfully synthesized Fe-doped (Ni,Mn)Co2O4 nanorod arrays on nickel foam (labeled as FNMCO/NF) via a anion-exchange route with subsequent annealing process. Experiments showed that the initial concentration of [Fe(CN)6]3- anions could affect the electrocatalytic activity of the as-synthesized FNMCO/NF integral electrode. The FNMCO-6/NF prepared from 6 mM of K3[Fe(CN)6] solution presented the strongest OER electrocatalytic activity. Only overpotential of 242 mV or 449 mV was required to reach the current density of 10 mA cm?2 in 1 M KOH solution or 0.1 M phosphate buffer solution (PBS). Also, after continuously catalyzing for 155 h at 100 mA cm?2 in 1 M KOH solution or 150 h at 20 mA cm?2 in 0.1 M PBS, the overpotential of the as-obtained FNMCO-6/NF electrode rarely varied, implying its superb durability.
College of Chemistry and Materials Science Key Laboratory of Functional Molecular Solids Ministry of Education Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials Anhui Normal University
NSTL
Elsevier
