共价有机框架负载贵金属铂用于电催化析氢  

Covalent Organic Frameworks Supported Noble-Metal Pt for Electrocatalytic Hydrogen Evolution

作　　者：张志艳[1] 张潇 石琛琛[1] ZHANG Zhi-yan*;ZHANG Xiao;SHI Chen-chen(Hebei Chemical&Pharmaceutical College,Shijiazhuang 050026,China)

机构地区：[1]河北化工医药职业技术学院,河北石家庄050026

出　　处：《分子催化（中英文）》2024年第1期42-50,I0002,共10页Journal of Molecular Catalysis(China)

摘　　要：我们探究了共价有机框架负载贵金属Pt的电催化析氢性能.以2,6-二氨基蒽醌和2,4,6-三甲酰基间苯三酚为构筑单元,采用溶剂热法合成了TP-DAAQ COF.随后通过金属前驱体浸渍法制备了Pt-TP-DAAQ COF.X射线粉末衍射,傅里叶红外光谱,氮气吸附/脱附等表明成功制备了TP-DAAQ COF和Pt-TP-DAAQ COF.电化学测试结果表明Pt-TP-DAAQ COF(其中含有5.8%的Pt)展现了比20%Pt/C优异的电催化活性.当电流密度为10 mA∙cm^(-2)时,Pt-TP-DAAQ COF的过电位为45 mV,Tafel斜率为29 mV∙dec^(‒1).这高效的电催化活性源于TP-DAAQ COF与Pt之间良好的协同效应.Pt-TP-DAAQ COF具有较大的比表面积和规整的一维孔道,使催化位点更易于与电解液中的物质发生接触和相互作用,从而增强了其催化性能.This work explored the electro-catalytic hydrogen evolution performance of covalent organic frameworks loaded with noble metal Pt.Tp-DAAQ COF was synthesized by solvothermal method using 2,6-diaminoanthraquinone and 2,4,6-Triformylphloroglucinol as building blocks.Subsequently,Pt-TP-DAAQ COF was prepared by impregnation of metal precursor.X-ray powder diffraction,Fourier infrared spectroscopy,and nitrogen adsorption/desorption showed that TP-DAAQ COF and Pt-TP-DAAQ COF were prepared successfully.The results of electrochemical tests showed that Pt-TP-DAAQ COF with a 5.8%Pt content showed better electrocatalytic activity than 20%Pt/C.When the current density is 10 mA∙cm^(‒2),the overpotential of Pt-TP-DAAQ COF is 45 mV,and the Tafel slope is 29 mV∙dec‒1.The synergistic effect between TP-DAAQ COF and Pt enhances the electrocatalytic activity of Pt-TP-DAAQ COF.Pt-TP-DAAQ COF has a larger specific surface area and regular one-dimensional channels,making catalytic sites more accessible for interaction with substances in the electrolyte,thereby enhancing its catalytic performance.

关 键 词：共价有机框架 贵金属铂 电催化 析氢反应 协同效应 

分 类 号：O643.36[理学—物理化学]