Nickel foam is widely used as a collector for electrocatalysts because of its excellent electrical conductivity;however,it is prone to react with elements such as oxygen,sulfur,and phosphorus during the growth of elec...Nickel foam is widely used as a collector for electrocatalysts because of its excellent electrical conductivity;however,it is prone to react with elements such as oxygen,sulfur,and phosphorus during the growth of electrode materials,which makes it brittle and fragile,thus limiting its large-scale application.In this study,bifunctional electrocatalysts with flexible multilevel Ni-based nanoclusters Ni@(Ni,Fe)Se_(2)/Ni@CC were synthesized on carbon cloth(CC)by hydrothermal and electrodeposition methods;these flexible electrocatalysts are convenient for subsequent industrial applications.At a current density of 10 mA cm^(−2),the overpotentials of the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)reached 98 and 224 mV,respectively,exceeding the catalytic effects of most metal-based collectors.The overall water-splitting potential of the catalyst was only 1.56 V at 10 mA cm^(−2),and the performance was maintained after a 24 h stability test.Ni@(Ni,Fe)Se_(2)/Ni@CC significantly improved the activity in alkaline environments by modulating the center of the d-band,thereby increasing the adsorption capacity of the catalyst for H ions.In this study,we improved the intrinsic activity and charge transfer of transition metal electrocatalysts by modifying the carbon cloth and constructing multilevel Ni-based nanoclusters,which provided some insights into the rational design of flexible bifunctional electrocatalysts.展开更多
基金funded by the National Natural Science Foundation of China.(No.51802177)Joint Funds of the National Natural Science Foundation of China(No.U22A20140)+1 种基金Jinan City-School Integration Development Strategy Project(No.JNSX2023015)University of Jinan Disciplinary Cross-Convergence Construction Project 2023(No.XKJC-202309)。
文摘Nickel foam is widely used as a collector for electrocatalysts because of its excellent electrical conductivity;however,it is prone to react with elements such as oxygen,sulfur,and phosphorus during the growth of electrode materials,which makes it brittle and fragile,thus limiting its large-scale application.In this study,bifunctional electrocatalysts with flexible multilevel Ni-based nanoclusters Ni@(Ni,Fe)Se_(2)/Ni@CC were synthesized on carbon cloth(CC)by hydrothermal and electrodeposition methods;these flexible electrocatalysts are convenient for subsequent industrial applications.At a current density of 10 mA cm^(−2),the overpotentials of the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)reached 98 and 224 mV,respectively,exceeding the catalytic effects of most metal-based collectors.The overall water-splitting potential of the catalyst was only 1.56 V at 10 mA cm^(−2),and the performance was maintained after a 24 h stability test.Ni@(Ni,Fe)Se_(2)/Ni@CC significantly improved the activity in alkaline environments by modulating the center of the d-band,thereby increasing the adsorption capacity of the catalyst for H ions.In this study,we improved the intrinsic activity and charge transfer of transition metal electrocatalysts by modifying the carbon cloth and constructing multilevel Ni-based nanoclusters,which provided some insights into the rational design of flexible bifunctional electrocatalysts.
