{"title":"Two-dimensional High-entropy MWN2 Nanosheets for Boosted Water Oxidation under Alkaline Media","authors":"Jiajing Wu, Shida Bao, Shan Jiang, Qiting Shao, Xuexia Lan, Tao Zhang, xiao yan, Zhi Yang, Chengliang Chai, Zhijun Dong, Zheng-Jie Chen, Jing Peng","doi":"10.1039/d5qi00121h","DOIUrl":null,"url":null,"abstract":"Transition metal nitrides are highly valued for their unique properties and diverse applications in coatings, lighting, and energy storage. However, achieving two-dimensional (2D) metal nitrides presents a significant challenge due to their strong atomic bonds. Here, we introduce a family of 2D multicomponent metal nitride, metal tungsten nitride (MWN2) nanosheets via precursor minimization and nitridation strategy. The composition of M and stoichiometric ratio can be easily modulated, and thus high-entropy (FeCoNiMn)WN2 nanosheets can be well produced. Prominently, the high-entropy MWN2 nanosheets demonstrate superior oxygen evolution with an overpotential of only 228 mV @10 mA cm-2 and exceptional stability, exhibiting a degradation rate of merely 15 µV h-1 over 1000 hours. Theoretical insights reveal that antisite defects substantially lower oxygen adsorption energy. This work sheds light on the highly active and stable catalytic properties of 2D metal nitrides for water oxidation.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":"21 1","pages":""},"PeriodicalIF":6.1000,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inorganic Chemistry Frontiers","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1039/d5qi00121h","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
Transition metal nitrides are highly valued for their unique properties and diverse applications in coatings, lighting, and energy storage. However, achieving two-dimensional (2D) metal nitrides presents a significant challenge due to their strong atomic bonds. Here, we introduce a family of 2D multicomponent metal nitride, metal tungsten nitride (MWN2) nanosheets via precursor minimization and nitridation strategy. The composition of M and stoichiometric ratio can be easily modulated, and thus high-entropy (FeCoNiMn)WN2 nanosheets can be well produced. Prominently, the high-entropy MWN2 nanosheets demonstrate superior oxygen evolution with an overpotential of only 228 mV @10 mA cm-2 and exceptional stability, exhibiting a degradation rate of merely 15 µV h-1 over 1000 hours. Theoretical insights reveal that antisite defects substantially lower oxygen adsorption energy. This work sheds light on the highly active and stable catalytic properties of 2D metal nitrides for water oxidation.
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