Three factors make bulk high-entropy alloys as effective electrocatalysts for oxygen evolution
作者机构：Wuhan National High Magnetic Field Center&School of PhysicsHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China College of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062People’s Republic of China School of Materials Science and EngineeringCenter of Analysis Measurement and ComputingHarbin Institute of TechnologyHarbin 150001People’s Republic of China Faculty of Materials Science and Energy Engineering/Institute of Technology for Carbon NeutralityShenzhen 518055People’s Republic of China Shenzhen Key Laboratory of Energy Materials for Carbon NeutralityShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China
出 版 物：《Materials Futures》 (材料展望（英文）)
年 卷 期：2023年第2卷第4期
页 面：115-125页
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：work was supported by the National Thousand a Young Talents Program of China,the Fundamental Research Funds for the Central Universities(2018KFYXKJC009) the National Natural Science Foundation of China(51871076) the NSFC of Hubei(Grant 2021CFB420)
主 题：high-entropy alloy solid solution electrocatalysis DFT calculation oxygen evolution reaction
摘 要：Even in their bulk forms,complex alloys like high-entropy alloys(HEAs)exhibit favorable activity and stability as electrocatalysts for the oxygen evolution reaction(OER).However,the underlying reasons are not yet fully *** a family of Mo-doped CrFeCoNi-based HEAs,we have identified three crucial factors that govern their performance:(i)homogeneous solid solution phase of HEAs helps to maintain high-valence states of metals;(ii)surface reconstruction results in a hybrid material comprising amorphous domains and percolated crystalline structures;(iii)diversity of active intermediate species(M–O,M–OOH,and,notably,the abundance of superoxideμ–OO),which display stronger adsorption capacity on the reconstructed *** results are revealing due to their resemblance to findings in other families of electrocatalysts for OER,as well as their unique features specific to *** line with these factors,a CrFeCoNiMo0.2 bulk integrated electrode displays a low overpotential of 215 mV,rapid kinetics,and long-term stability of over 90 *** HEAs hold great potential for industrial applications.
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