Long‐Lasting Electrospun Co3O4 Nanofibers for Electrocatalytic Oxygen Evolution Reaction,ChemistrySelect

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Long‐Lasting Electrospun Co3O4 Nanofibers for Electrocatalytic Oxygen Evolution Reaction
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-07-02 , DOI: 10.1002/slct.202001291
Abdalaziz Aljabour _{1,

2}

Affiliation

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 Co₃O₄ electrocatalyst towards oxygen evolution with an excellent long‐term durability over 100 hours.

中文翻译：

持久电纺Co3O4纳米纤维用于电催化氧释放反应

电催化水分解是建立可再生和可持续能源技术的关键现象之一。尽管发展氢的工业科学方面取得了进步，但是由于在寻找合适的和稳定的电催化剂，统一电解条件并因此反应动力学缓慢方面的复杂性，氧电化学仍然落后。在此，我们报道了氧化钴纳米纤维在碱性氧释放反应中的电催化活性，其基本使用寿命为120小时。通过静电纺丝独特地制备纤维，可以增强电极网络和纳米纤维的相互作用，从而扩大催化活性的表面积，这对于进行良好的电解至关重要。在10 mA cm的电流密度下以293 mV的低过电势工作⁻²以及在1 M KOH中的60.5 mV dec ^-1的低Tafel斜率表明，纳米纤维状的Co ₃ O ₄电催化剂有效地利用了氧气，在100小时内具有出色的长期耐久性。

更新日期：2020-07-02

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