| 张志艳,张潇,石琛琛.共价有机框架负载贵金属铂用于电催化析氢[J].分子催化,2024,38(1):42-50 |
| 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 |
| 投稿时间：2023-08-09 修订日期：2023-10-16 |
| DOI：10.16084/j.issn1001-3555.2024.01.006 |
| 中文关键词: 共价有机框架 贵金属铂 电催化 析氢反应 协同效应 |
| 英文关键词:covalent organic frameworks noble-metal Pt electrocatalysis hydrogen evolution reaction synergistic effect |
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| 中文摘要: |
| 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. |
| 英文摘要: |
| 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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