Electronic modulation of sprout-shaped NiCoP nanoarrays by N and Ce doping for efficient overall water splitting  

作　　者：Ting Zhao Guancheng Xu Bingbing Gong Jiahui Jiang Li Zhang 

机构地区：[1]State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources,College of Chemistry,Xinjiang University,Urumqi 830017,China [2]College of Chemical Engineering,Xinjiang University,Urumqi 830017,China

出　　处：《Nano Research》2024年第1期282-289,共8页纳米研究（英文版）

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).

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.

关 键 词：transition metal phosphides overall water splitting elements doping NANOARRAYS 

分 类 号：O64[理学—物理化学]