Yttrium‐and nitrogen‐doped NiCo phosphide nanosheets for high‐efficiency water electrolysis  

作　　者：Guangliang Chen Huiyang Xiang Yingchun Guo Jun Huang Wei Chen Zhuoyi Chen Tongtong Li Kostya(Ken)Ostrikov 

机构地区：[1]Department of Materials Engineering,Huzhou University,Huzhou,China [2]School of Materials Science and Engineering,Zhejiang Sci‐Tech University,Hangzhou,China [3]School of Physics and Electronic Information,Gannan Normal University,Ganzhou,China [4]School of Chemistry and Physics,Centre for Materials Science,Centre for Clean Energy Technologies and Practices,Centre for Waste−Free World,Queensland University of Technology(QUT),Brisbane,Queensland,Australia

出　　处：《Carbon Energy》2024年第8期214-231,共18页碳能源（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Number:52177162;the Natural Science Foundation of Zhejiang Province,Grant/Award Numbers:LZ22E070003,LQ22E020006;the Funding Project for Academic/Technical Leaders of Jiangxi Province,Grant/Award Number:20225BCJ22003;the Natural Science Foundation of Jiangxi Province,Grant/Award Number:20212ACB211001。

摘　　要：Engineering high‐performance and low‐cost bifunctional catalysts for H_(2)(hydrogen evolution reaction[HER])and O_(2)(oxygen evolution reaction[OER])evolution under industrial electrocatalytic conditions remains challenging.Here,for the first time,we use the stronger electronegativity of a rare‐Earth yttrium ion(Y^(3+))to induce in situ NiCo‐layered double‐hydroxide nanosheets from NiCo foam(NCF)treated by a dielectric barrier discharge plasma NCF(PNCF),and then obtain nitrogen‐doped YNiCo phosphide(N‐YNiCoP/PNCF)after the phosphating process using radiofrequency plasma in nitrogen.The obtained NYNiCoP/PNCF has a large specific surface area,rich heterointerfaces,and an optimized electronic structure,inducing high electrocatalytic activity in HER(331mV vs.2000mA cm^(−2))and OER(464mV vs.2000mA cm^(−2))reactions in 1MKOH electrolyte.X‐ray absorption spectroscopy and density functional theory quantum chemistry calculations reveal that the coordination number of CoNi decreased with the incorporation of Y atoms,which induce much shorter bonds of Ni and Co ions and promote long‐term stability of N‐YNiCoP in HER and OER under the simulated industrial conditions.Meanwhile,the CoN‐YP_(5) heterointerface formed by plasma N‐doping is the active center for overall water splitting.This work expands the applications of rare‐Earth elements in engineering bifunctional electrocatalysts and provides a new avenue for designing highperformance transition‐metal‐based catalysts in the renewable energy field.

关 键 词：overall water splitting plasma etching plasma N‐doping rare‐earth electrocatalyst yttrium incorporation 

分 类 号：TB383[一般工业技术—材料科学与工程] O64[理学—物理化学]