低共熔溶剂热制备泡沫镍负载 CoCO₃-NiOOH及其电催化析氧性能

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中图分类号：TQ426 文献标志码：A

Abstract：A ternary dep-eutectic solvent（DES）systemwasconstructed using glycerol，urea，andcobaltchloride.Anda three-dimensional nanoflower-like nickel foam-supported CoCO3 -NiOOHcatalyst（ CoCO3-NiOOH/NF（D） ）was fabricated throughone-stepdeep-eutectic solvothermal method.Theresultsshowthatthefoamnickelsupportinsitureactswiththeternary DES under solvothermal conditions，resulting in a composite of CoCO3 and NiOOH enriched with oxygen vacancy defects.Thethre-dimensional conductivenetworkefectivelypromotesinterfacial electron transferand theexposureofactive sites.The prepared CoCO3-NiOOH/NF（D） ）catalyst exhibits excellent electrocatalytic oxygen evolution（OER）performance.The overpotential is only 295mV at a current density of 20mA/cm2 and the Tafel slope is 78.1mV/dec .The performance is much better than the CoCO3-NiOOH/NF（W） catalyst synthesized by the traditional hydrothermal method（407 mV， 112.8mV/dec ）．Additionally，the CoCO3-NiOOH/NF（D） ）catalyst also demonstrates excellent cycling stability， maintaining a current density retention rate of 92% aftera long-term stability test of 60h ：

Keywords：oxygen evolutionreaction；deep eutecticsolvent；solvothermal reaction；transitionmetal catalyst； composite structure

电解水制氢过程分为阳极的析氧反应（OER）和阴极的析氢反应（HER）[7-9]。（剩余14851字）