Methanol steam mediated corrosion engineering towards high-entropy NiFe layered double hydroxide for ultra-stable oxygen evolution  

作　　者：Jinqiang Gao Haifeng Yuan Xinjuan Du Feng Dong Yu Zhou Shengnan Na Yanpeng Chen Mingyu Hu Mei Hong Shihe Yang 

机构地区：[1]Guangdong Provincial Key Laboratory of Nano-Micro Materials Research,School of Advanced Materials,Peking University Shenzhen Graduate School(PKUSZ),Shenzhen 518055,China [2]School of Chemical Engineering and Technology,Xi’an Jiaotong University,Xi’an 710049,China [3]Department of Physics,Hong Kong Baptist University,Hong Kong 999077,China

出　　处：《Chinese Chemical Letters》2025年第1期338-343,共6页中国化学快报(英文版)

基　　金：supported by the Guangdong Science and Technology Program(No.2023A0505010018);the National Natural Science Foundation of China(No.22309155);the Shenzhen Science and Technology Program(No.JCYJ20200109140421071)。

摘　　要：Rational design of viable routes to obtain efficient and stable oxygen evolution reaction(OER)electrocatalysts remains challenging,especially under industrial conditions.Here,we provide a solvent-steam assisted corrosion engineering strategy to directly fabricate high-entropy NiF e-LDH with spatially resolved structural order.Ammonium fluoride in methanol steam enables the formation of nanosheets while Fe^(3+)effectively enhances their adhesion to the semi-sacrificial nickel-iron foam(NFF),thereby conjuring up a Ni Fe-LDH@NFF catalyst that exhibits remarkable adaptability to robust electrochemical activation yet with excellent stability.Comprehensive measurements reveal the in-situ formation of high-valance metal oxyhydroxide and the enhancement of adsorption-desorption process.Under the industrial condition(6 mol/L KOH,60℃),the Ni Fe-LDH@NFF exhibits excellent activity of 50 mA/cm^(2) at 1.55 V and high durability of over 120 h at 200 mA/cm^(2).We anticipate that the steam assisted strategy could promote the development of efficient non-precious electrocatalysts for hydrogen energy.

关 键 词：High-entropy material Corrosion engineering NiFe-LDH Oxygen evolution reaction Stability 

分 类 号：TG1[金属学及工艺—金属学]