With the continuous depletion of traditional energy sources,the development of sustainable energy sources has become one of the important tasks today.A two-step synthesis method was employed to construct Ni_(3)S_(2)/Z...With the continuous depletion of traditional energy sources,the development of sustainable energy sources has become one of the important tasks today.A two-step synthesis method was employed to construct Ni_(3)S_(2)/ZrCoFe-LDH@NF heterostructured electrocatalysts on nickel foam(NF)in situ.X-ray diffractometer,scanning electron mi-croscope,transmission electron microscope,and X-ray electron spectroscopy were employed to characterize the Ni_(3)S_(2)/ZrCoFe-LDH@NF heterostructure,and the hydrogen-extraction reaction(HER),oxygen-extraction reaction(OER)and total hydrolysis properties of this electrocatalyst were tested in 1 mol·L^(-1)KOH electrolyte.It is shown that Ni_(3)S_(2)/ZrCoFe-LDH@NF is a lamellar stacked heterostructure with an overpotential of 330 mV and a Tafel slope of 90.9 mV·dec^(-1)at a current density of 100 mA·cm^(-2)in the OER reaction and 159.2 mV at a current density of 10 mA·cm^(-2)in the HER reaction.The Tafel slope is 96 mV·dec^(-1),and the catalyst exhibits good structural stability in the 100 h total hydrolysis stability test.The successful construction of this heterostructured electrocatalyst provides a good idea and research basis for the subsequent heterojunction and its application in electrocatalysis.展开更多
基金supported by the National Natural Science Foundation of China(No.51504147)the Natural Science Basic Research Program of Department of Science and Technology of Shaanxi Province(2023-JC-YB-404).
文摘With the continuous depletion of traditional energy sources,the development of sustainable energy sources has become one of the important tasks today.A two-step synthesis method was employed to construct Ni_(3)S_(2)/ZrCoFe-LDH@NF heterostructured electrocatalysts on nickel foam(NF)in situ.X-ray diffractometer,scanning electron mi-croscope,transmission electron microscope,and X-ray electron spectroscopy were employed to characterize the Ni_(3)S_(2)/ZrCoFe-LDH@NF heterostructure,and the hydrogen-extraction reaction(HER),oxygen-extraction reaction(OER)and total hydrolysis properties of this electrocatalyst were tested in 1 mol·L^(-1)KOH electrolyte.It is shown that Ni_(3)S_(2)/ZrCoFe-LDH@NF is a lamellar stacked heterostructure with an overpotential of 330 mV and a Tafel slope of 90.9 mV·dec^(-1)at a current density of 100 mA·cm^(-2)in the OER reaction and 159.2 mV at a current density of 10 mA·cm^(-2)in the HER reaction.The Tafel slope is 96 mV·dec^(-1),and the catalyst exhibits good structural stability in the 100 h total hydrolysis stability test.The successful construction of this heterostructured electrocatalyst provides a good idea and research basis for the subsequent heterojunction and its application in electrocatalysis.
