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Long‐Lasting Electrospun Co 3 O 4 Nanofibers for Electrocatalytic Oxygen Evolution Reaction
Author(s) -
Aljabour Abdalaziz
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202001291
Subject(s) - tafel equation , oxygen evolution , electrocatalyst , overpotential , electrolysis of water , materials science , electrospinning , electrochemistry , electrolysis , chemical engineering , water splitting , oxide , catalysis , alkaline water electrolysis , nanofiber , faraday efficiency , cobalt oxide , electrolyte , nanotechnology , electrode , chemistry , composite material , metallurgy , polymer , biochemistry , photocatalysis , engineering
Electrocatalytic water splitting is one of the key phenomena in establishing renewable and sustainable energy technologies. Despite advances in hydrogen evolving industrial science, the oxygen electrochemistry lags behind due to the complexity in seeking suitable and stable electrocatalysts, in unifying electrolytic conditions and hence sluggish reaction kinetics. Herein, we report on the electrocatalytic activity of the cobalt oxide nanofibers in alkaline oxygen evolution reaction with a substantial operation lifetime of 120 hours. The unique preparation of fibers by electrospinning enables increased electrode networking and nanofibrous interaction thus leading to extended catalytically active surface area, imperative for well‐performing electrolysis. Operating at low overpotential of 293 mV at a current density of 10 mA cm −2 , as well as low Tafel slope of 60.5 mV dec −1 in 1 M KOH indicate the efficient utilization of nanofibrous Co 3 O 4 electrocatalyst towards oxygen evolution with an excellent long‐term durability over 100 hours.