Electronic modulation and dual-defect construction of NiMoP/Ni_(2)P heterointerfaces for sustainable oxygen evolution reaction  

作　　者：Qing-Qing Zhang Yan-Na Xu De-Rong Duan Heng-Jun Su Tao Wang Xiao-Jun Zeng 

机构地区：[1]National Engineering Research Center for Domestic&Building Ceramics,School of Materials Science and Engineering,Jingdezhen Ceramic University,Jingdezhen,333403,China [2]School of Energy and Power Engineering,Chongqing University,Chongqing,400044,China

出　　处：《Rare Metals》2025年第1期311-323,共13页稀有金属(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.22269010);Jiangxi Provincial Natural Science Foundation(No.20224BAB214021);the Opening Project of National Engineering Research Center for Domestic&Building Ceramics(No.GXZX2302).

摘　　要：The existence of multiple vacancies leads to significant changes in the local atomic structure,which can regulate the electronic structure of the surface and form unsaturated coordination geometries.However,the current methods employed to generate multiple vacancies in two-dimensional(2D)layered double hydroxide(LDH)materials are still difficult to achieve to some extent and are primarily limited to monolayer LDH structures.Here,we present an improved method to synthesize NiMoP/Ni_(2)P catalysts with a sponge-like porous structure.Firstly,NiO with dual defects was constructed by subjecting NiMo-LDH/Ni to air calcination.Subsequently,we performed phosphorization treatment and introduced multiple Ni vacancies and O vacancies as defect sites to tune the edge and substrate surfaces of LDH.At the same time,the electronic structure was tuned by adding P heteroatoms.The synergistic effect of porous structure,heterogeneous interfaces,vacancies,doping defects,and amorphous states can greatly enhance the electron transfer effect inside the catalysts,which significantly improves the catalytic ability of the oxygen evolution reaction(OER).Therefore,the overpotential for the oxygen evolution reaction of NiMoP/Ni_(2)P heterointerfaces reaches 270 mV at a current density of 10 mA·cm^(-2)under alkaline conditions,with the catalysts capable of sustaining high current densities even after the durability testing for 35 h.

关 键 词：Multimetal phosphides Heterointerfaces Electronic transfer Structural reconstruction OER electrocatalysts 

分 类 号：O64[理学—物理化学]