Nanostructured amorphous Fe_(29)Co_(27)Ni_(23)Si_(9)B_(12) high-entropy-alloy:an efficient electrocatalyst for oxygen evolution reaction

作     者：Hongyan Wang Ran Wei Xiumin Li Xuli Ma Xiaogang Hao Guoqing Guan Hongyan Wang;Ran Wei;Xiumin Li;Xuli Ma;Xiaogang Hao;Guoqing Guan

作者机构：School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Department of Environmental Science and EngineeringTaiyuan University of Technology.Taiyuan 030024China Department of Chemical EngineeringTaiyuan University of TechnologyTaiyuan 030024China Energy Con version Engineering LaboratoryInstitute of Regional InnovationHirosaki University2-1-3 MatsubaraAomori 030-0813Japan 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第68卷第9期

页      面：191-198页

核心收录：

学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 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：The financial supports from the key research&development and promotion of special project of Henan province (science&technology)(Grant No.192102210006) the Scientific Research Foundation of Zhengzhou University (32210862,32211241) 

主　　题：Water splitting High-entropy-alloys Oxygen evolution reaction Electro-catalyst 

摘      要：Proximal configu ration of dissimilar metal atoms in amorphous high-entropy-alloys(HEAs) always re sult in interatomic d-band ligand effect,dense defect distribution,coordinatively unsaturated sites,high potential energy,and loose atom ***,nanostructured amorphous Fe_(29)Co_(27)Ni_(23)Si_(9)B_(12) HEA ribbon is fabricated via a melt spinning method combined with electrochemical corrosion etching process,which is applied as the potential oxygen evolution reaction *** is found that there are micro/nano pits on the surface of etched amorphous Fe_(29)Co_(27)Ni_(23)Si_(9)B_(12) *** elements of HEAs bond with each other to form a highly disordered configu ration,which could result in an optimized bonding energy and enhanced intrinsic catalytic *** electrocatalysis activity measurements indicate that the amorphous HEA endows a much higher activity than the crystalline one,which is further improved by the electrochemical etching ***,the HEA ribbon etched for 3 h requires a low overpotential of 230 mV to afford 10 mA cm^(-2) current *** addition,density functional theory calculations demonstrate that the amorphous structure can weaken the interaction between the surface of Fe_(29)Co_(27)Ni_(23)Si_(9)B_(12) alloy and the intermediates,leading to an optimized adsorption Gibbs free energy.