Electronic modulation of sprout-shaped NiCoP nanoarrays by N and Ce doping for efficient overall water splitting
作者机构：State Key Laboratory of Chemistry and Utilization of Carbon Based Energy ResourcesCollege of ChemistryXinjiang UniversityUrumqi 830017China College of Chemical EngineeringXinjiang UniversityUrumqi 830017China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2024年第17卷第1期
页 面：282-289页
核心收录：
学科分类：07[理学] 070304[理学-物理化学(含∶化学物理)] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学]
基 金：supported by the National Natural Science Foundation of China(Nos.21965035 and 22065034) Sponsored by Natural Science Foundation of Xinjiang Uygur Autonomous Region(No.2022D01E36).
主 题：transition metal phosphides overall water splitting elements doping nanoarrays
摘 要：Bifunctional catalysts for hydrogen/oxygen evolution reactions(HER/OER)are urgently needed given the bright future of water splitting hydrogen production technology.Here,the self-supporting N and Ce dual-doped NiCoP nanoarrays(denoted N,Ce-NiCoP/NF)grown on Ni foam are successfully constructed.When the N,Ce-NiCoP/NF simultaneously acts as the HER and OER electrodes,the voltages of 1.54 and 2.14 V are obtained for driving 10 and 500 mA·cm^(-2)with a robust durability,and demonstrate its significant potential for practical water electrolysis.According to both experiments and calculations,the electronic structure of NiCoP may be significantly altered by strategically incorporating N and Ce into the lattice,which in turn optimizes the Gibbs free energy of HER/OER intermediates and speeds up the water splitting kinetics.Moreover,the sprout-shaped morphology significantly increases the exposure of active sites and facilitates charge/mass transfer,thereby augmenting catalyst performance.This study offers a potentially effective approach involving the regulation of anion and cation double doping,as well as architectural engineering,for the purpose of designing and optimizing innovative electrocatalysts.
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