Two-dimensional bifunctional electrocatalyst(Mo-NiFe-LDH)with multilevel structure for highly efficient overall water splitting  

作　　者：Bao-Jie Zhang Bin Chang Shi-Peng Qiu Gang Zhao Xiao Wang Xi-Jin Xu Lan Mu Wen-Bo Liao Xiao-Jing Dong 

机构地区：[1]School of Physics and Technology,University of Jinan,Jinan 250000,China [2]KAUST Catalysis Center(KCC),King Abdullah University of Science and Technology(KAUST),Thuwal 23955-6900,Kingdomof SaudiArabia [3]School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China [4]School of Physics and Physical Engineering,Qufu Normal University,Qufu273100,China

出　　处：《Rare Metals》2024年第6期2613-2622,共10页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.62001189 and 51802177);the Joint Funds of the National Natural Science Foundation of China(No.U22A20140);the Youth Innovation Group Plan of Shandong Province(No.2022KJ095);the Plan for the Introduction and Cultivation of Young Innovative Talent in the Colleges and Universities of Shandong Province;Supported by Guiding Fund of Zaozhuang Industrial Technology Research Institute of University of Jinan。

摘　　要：To effectively address energy challenges,it is crucial to explore efficient and stable bifunctional nonprecious metal catalysts.In this study,a Mo-doped nickeliron layered double hydroxide with flower-cluster architecture was successfully prepared by a one-step hydrothermal method,which demonstrated a good water splitting performance.After an appropriate amount of Mo doping,some lattice distortions in the material provided reactive sites for the adsorption and conversion of intermediates,thus optimising the charge distribution of the material.Moreover,the multidimensional void structures formed after doping had a larger specific surface area and accelerated the penetration of the electrolyte,which significantly improved the activity of the catalyst in alkaline media.At 10 mA·cm^(-2),the hydrogen and oxygen evolution overpotentials of Mo-doped nickel-iron double hydroxides(Mo-NiFe LDH/NF-0.2)were 167 and 220 mV,respectively,with an excellent durability up to 24 h.When the Mo-NiFe LDH/NF-0,2 catalyst was used as the cathode and anode of an electrolytic cell,the catalyst achieved a current density of 10 mA·cm^(-2)at an applied voltage of 1.643 V.This study provides a novel approach for designing excellent bifunctional electrocatalysts containing nonprecious metals.

关 键 词：Bifunctional electrocatalysts 2D multilevel structure Overall water splitting Mo-doped Ni-Fe LDH 

分 类 号：TQ116.2[化学工程—无机化工] TQ426