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