首页|Metal complexes of bipyridine-functionalized covalent organic frameworks as efficient electrocatalysts for oxygen evolution reaction

Metal complexes of bipyridine-functionalized covalent organic frameworks as efficient electrocatalysts for oxygen evolution reaction

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Electrocatalytic water splitting is considered a clean and practical method for producing energy.In this study,COF-Bpy,a bipyridine-functionalized covalent organic framework(COF),was prepared via post-synthetic modifi-cation,after which electrocatalysts for the oxygen evolution reactions(OER)were formed through coordination to single-or double-transition metals(Fe,Co,Ni,FeCo,FeNi or CoNi).COF-Bpy@FeNi delivered the best OER performance among the studied electrocatalysts,with an overpotential of 399 mV at 10 mA·cm-2 in an alkaline electrolyte(1.0 mol·L-1 KOH aqueous).Notably,the electrocatalytic performance of COF-Bpy@FeNi showed slight degradation during durability test-ing,which is ascribable to its irreversible benzoquinoline structure and strong metal coordination.As expected,COF-Bpy@FeNi exhibited a low overpotential of 347 mV at a turnover frequency(TOF)of 0.1 s-1,which suggests that COF-Bpy@FeNi possesses excellent intrinsic electrocatalytic OER activity.Finally,density functional theory(DFT)cal-culations reveal that the Ni site plays a major role,while the Fe site adjusts the electronic structure of the Ni ions,which rationalizes the excellent OER properties of COF-Bpy@FeNi.This study not only provides a simple and efficient method for complexing COFs with transition metals,but also offers a novel strategy for designing porous organic polymer electrocatalysts.

Covalent organic frameworkOxygen evolution reactions(OER)electrocatalystNickel-iron synergyWater splitting

Zhuang-Zhuang Wu、Tian Xia、Ying Liang、Yong-Peng Li、Zhu-Yin Sui、Li-Juan Feng、Dao-Xiong Wu、Xin-Long Tian、Qi Chen

展开 >

State Key Laboratory of Marine Resource Utilization in South China Sea,School of Marine Science and Engineering,Hainan University,Haikou 570228,China

School of Chemistry and Chemical Engineering,Yantai University,Yantai 264005,China

School of Bioengineering,Zhuhai Campus of Zunyi Medical University,Zhuhai 519041,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaHainan Province Science and Technology Special FundScience and Technology Project of Guizhou ProvinceQingchuang Technology Support ProgramTaishan Scholars Program of Shandong ProvinceHainan Provincial Natural Science Foundation of ChinaStartup Research Foundation of Hainan UniversityNumerical computations were performed on Hefei advanced computing center

5206301421975058ZDYF2022SHFZ299QKH foundation-ZK[2022]General 5892020KJC002tsqn201909087222MS006KYQDZR-21125

2024

10.1007/s12598-024-02681-1

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(7)
  • 5