有机配体表面改性NiCo2O4纳米线用于水全分解
Surface Modification of NiCo2O4 Nanowires using Organic Ligands for Overall Water Splitting
摘要
Abstract
Bifunctional electrocatalysts in alkaline media play an important role in the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER),owing to the considerable influence of water splitting in the green energy sector.Herein,we present surface-modified NiCo2O4 nanowires(NWs)with rich defects as a highly efficient overall water splitting electrocatalyst in alkaline media,where the surface modification is accomplished using organic ligands.X-ray photoelectron spectroscopy reveals that the increase in the Co2+/Co3+ ratio is responsible for the excellent bifunctional electrocatalytic performance of the surface-modified NiCo2O4 NWs.As expected,benefiting from the organic ligand-dominated surface modification,the optimized NiCo2O4 NWs can display an overpotential of only 83 mV for the HER and 280 mV for the OER,with a current density of 10 mA·cm-2 in 1.0 mol·L-1 KOH solution.More importantly,the NiCo2O4 NWs surface-modified using organic ligands exhibit outstanding performance for overall water splitting,with a voltage of 2.1 V and current density of 100 mA·cm-2,and also maintain their activity for at least 15 h.The present work highlights the importance of increasing the content of Co2+ in the spinel structure of NiCo2O4 NWs for enhancing their performance in overall water splitting.关键词
双功能电催化剂/有机配体/界面/表面修饰纳米线/水全分解Key words
Bifunctional electrocatalyst/Organic ligand/Interface/Surface modified nanowire/Water splitting分类
化学化工引用本文复制引用
孙轲,赵永青,殷杰,靳晶,刘翰文,席聘贤..有机配体表面改性NiCo2O4纳米线用于水全分解[J].物理化学学报,2022,38(6):130-137,8.基金项目
The project was supported by the National Natural Science Foundation of China(21931001,21922105,51771085,51801088),the Special Fund Project of Guiding Scientific and Technological Innovation Development of Gansu Province(2019ZX-04),the 111 Project(B20027),the Fundamental Research Funds for the Central Universities(lzujbky-2021-pd04,lzujbky-2021-sp41,lzujbky-2021-it12,lzujbky-2021-37),the China Postdoctoral Science Foundation(2021M691375),and the China National Postdoctoral Program for Innovative Talents(BX20200157).国家自然科学基金(21931001,21922105,51771085,51801088),甘肃省引导科技创新发展专项基金项目(2019ZX-04),111项目(B20027),中央高校基本科研业务费专项资金(lzujbky-2021-pd04,lzujbky-2021-sp41,lzujbky-2021-it12,lzujbky-2021-37),中国博士后科学基金(2021M691375),国家博士后创新人才计划(BX20200157)资助项目 （21931001,21922105,51771085,51801088）
