Fe3+协同Ni基金属-有机框架提升电催化析氧反应活性的研究
收稿日期: 2023-05-25
网络出版日期: 2024-02-06
基金资助
国家自然科学基金项目(22272086);四川省自然科学基金项目(2023NSFSC0009);四川省高等学校绿色化学重点实验室开放项目(LZY1901)
Study on collaborative strategy between Fe3+ and Ni-based metal-organic frameworks for boosting electrocatalytic oxygen evolution
Received date: 2023-05-25
Online published: 2024-02-06
采用溶剂热法合成了金属-有机框架材料（phen-Ni），然后通过掺杂异金属Fe3+制备了Fe@phen-Ni电催化剂。利用X射线单晶衍射仪、X射线光电子能谱仪、扫描电子显微镜和透射电子显微镜等对催化剂的物相、形貌及各成分化学状态进行表征。利用线性扫描伏安法（LSV）和电化学阻抗谱（EIS）等研究了Fe@phen-Ni催化剂的电催化析氧（OER）性能。结果表明，当电流密度为10 mA/cm2时，Fe@phen-Ni的OER过电位为333 mV，与phen-Ni相比显示出更优异的OER催化活性。Fe@phen-Ni电催化活性的提高归因于Fe3+的引入，这不仅增加了电催化剂的活性位点，而且由于Fe3+和Ni2+的协同作用，促进了电子转移，从而提高了电催化活性。该工作不仅证实了异金属离子的掺杂有利于提高电催化析氧活性，而且为基于金属-有机框架材料制备电化学OER催化剂提供了新的思路。
陈星亮 , 范文娟 , 常会 , 黄海平 , 蒋志强 . Fe3+协同Ni基金属-有机框架提升电催化析氧反应活性的研究[J]. 无机盐工业, 2024 , 56(2) : 152 -158 . DOI: 10.19964/j.issn.1006-4990.2023-0287
The metal-organic framework materials（phen-Ni） were synthesized by solvothermal method，and then Fe@phen-Ni electrocatalys were prepared by doping heterometallic Fe3+.The morphology，crystal structure and chemical composition of Fe@phen-Ni were characterized by X-ray single crystal diffractometer，scanning electron microscope（SEM），transmission electron microscope（TEM） and X-ray photoelectron spectrometer（XPS）.The electrochemical oxygen evolution reaction（OER） activity of Fe@phen-Ni was investigated by linear sweep voltammetry（LSV） and electrochemical impedance spectroscopy（EIS）.The results exhibited that Fe@phen-Ni had more excellent electrocatalytic performance with an overpotential of 333 mV at the current density of 10 mA/cm2 when compared with that of phen-Ni.The improvement could be attributed to the two factors.The introduction of Fe3+ increased the active site of the electrocatalyst.The synergistic action of Fe3+ and Ni2+ promoted the electron transfer.This work not only confirmed that doping of Fe3+ was beneficial to improve the electrocatalytic oxygen-evolution activity，but also provided a new idea for the preparation of electrocatalytic OER catalysts based on metal-organic frame materials.
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