The strategy of synthesizing high-efficiency oxygen evolution reaction(OER)catalysts using sacrificing metal–organic framework(MOF)templates is considered promising.However,few reports have focused on improving the i...The strategy of synthesizing high-efficiency oxygen evolution reaction(OER)catalysts using sacrificing metal–organic framework(MOF)templates is considered promising.However,few reports have focused on improving the intrinsic electrocatalytic activity of the MOF templates.Herein,we have developed a universal synthesis method for synthesizing a series of ternary coral-like FeNiM(M=Zn,Co and Cd)MOF templates.Benefitting from the synergistic effect,these trimetallic templates exhibit identical morphologies and outstanding OER performance compared to mono-metal templates.Moreover,transition metal sulfides(FeNiZnS)have been synthesized to enhance the overall electrical conductivity of catalyst materials.Optimized FeNiZnS-1 exhibits a minimal overpotential of 249 mV to achieve a current density of 10 mA cm^(−2),alongside outstanding electrochemical durability over 60 h in chronopotentiometry(CP)testing.The two-electrode couple FeNiZnS-1//Pt/C achieves a cell voltage of 1.54 V at 10 mA cm^(−2) for overall water splitting in 1 M KOH solution.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.52073199 and 52274304).
文摘The strategy of synthesizing high-efficiency oxygen evolution reaction(OER)catalysts using sacrificing metal–organic framework(MOF)templates is considered promising.However,few reports have focused on improving the intrinsic electrocatalytic activity of the MOF templates.Herein,we have developed a universal synthesis method for synthesizing a series of ternary coral-like FeNiM(M=Zn,Co and Cd)MOF templates.Benefitting from the synergistic effect,these trimetallic templates exhibit identical morphologies and outstanding OER performance compared to mono-metal templates.Moreover,transition metal sulfides(FeNiZnS)have been synthesized to enhance the overall electrical conductivity of catalyst materials.Optimized FeNiZnS-1 exhibits a minimal overpotential of 249 mV to achieve a current density of 10 mA cm^(−2),alongside outstanding electrochemical durability over 60 h in chronopotentiometry(CP)testing.The two-electrode couple FeNiZnS-1//Pt/C achieves a cell voltage of 1.54 V at 10 mA cm^(−2) for overall water splitting in 1 M KOH solution.
