Transition metal nitrides are highly valued owing to their unique properties and diverse applications in coatings,lighting applications,and energy storage.However,the development two-dimensional(2D)metal nitrides pres...Transition metal nitrides are highly valued owing to their unique properties and diverse applications in coatings,lighting applications,and energy storage.However,the development two-dimensional(2D)metal nitrides presents a significant challenge owing to their strong atomic bonds.Herein,we introduce a family of 2D multicomponent metal nitrides,metal tungsten nitride(MWN_(2))nanosheets,via a precursor minimization and nitridation strategy.The composition of M and the stoichiometric ratio can be readily tailored,enabling the successful preparation of high-entropy(FeCoNiMn)WN_(2)nanosheets.Prominently,the high-entropy MWN_(2)nanosheets demonstrate superior oxygen evolution with an overpotential of only 228 mV at 10 mA cm^(−2)and exceptional stability,exhibiting a degradation rate of merely 15μV h^(−1)over 1000 hours.Theoretical insights reveal that antisite defects substantially lower the oxygen adsorption energy.This work sheds light on the highly active and stable catalytic properties of 2D metal nitrides for water oxidation.展开更多
基金financially supported by the National Natural Science Foundation of China(No.22275205,22205148,and 52403381)the Science and Technology Foundation of Shenzhen(No.JCYJ20220530154404010,JCYJ20230807140900001,and JCYJ20220818100806014)+1 种基金the Guangdong Basic and Applied Basic Research Foundation(No.2023B1515020102 and 2022A1515110408)supported by the public computing service platform provided by SIAT.
文摘Transition metal nitrides are highly valued owing to their unique properties and diverse applications in coatings,lighting applications,and energy storage.However,the development two-dimensional(2D)metal nitrides presents a significant challenge owing to their strong atomic bonds.Herein,we introduce a family of 2D multicomponent metal nitrides,metal tungsten nitride(MWN_(2))nanosheets,via a precursor minimization and nitridation strategy.The composition of M and the stoichiometric ratio can be readily tailored,enabling the successful preparation of high-entropy(FeCoNiMn)WN_(2)nanosheets.Prominently,the high-entropy MWN_(2)nanosheets demonstrate superior oxygen evolution with an overpotential of only 228 mV at 10 mA cm^(−2)and exceptional stability,exhibiting a degradation rate of merely 15μV h^(−1)over 1000 hours.Theoretical insights reveal that antisite defects substantially lower the oxygen adsorption energy.This work sheds light on the highly active and stable catalytic properties of 2D metal nitrides for water oxidation.
