多级自支撑氧还原电极的制备及催化性能研究  

Preparation and catalytic performance study ofhierarchical self-supporting oxygen reduction reaction

作　　者：陈帅 李姝馨 张涵 高立群 王旭 李莉香[1] 安百钢[1] CHEN Shuai;LI Shuxin;ZHANG Han;GAO Liqun;WANG Xu;LI Lixiang;AN Baigang(School of Chemical Engineering,University of Science and Technology Liaoning,Anshan 114051,China;Shenyang Zhongke Corrosion Control Engineering and Technology Co.,Ltd,Shenyang 110027,China)

机构地区：[1]辽宁科技大学化学工程学院,辽宁鞍山114051 [2]沈阳中科腐蚀控制工程技术有限公司,辽宁沈阳110027

出　　处：《辽宁科技大学学报》2024年第4期265-272,共8页Journal of University of Science and Technology Liaoning

基　　金：国家自然科学基金青年基金资助项目(22109061);辽宁省教育厅重点攻关项目(JYTZD2023093);辽宁省博士科研启动基金资助项目(2022-BS-283);2022年和2023年辽宁省能源材料与电化学重点实验室开放课题基金。

摘　　要：燃料电池作为能源的高效存储和转换设备,在诸多领域具有广阔应用前景。为了设计和调控碳纳米材料的结构及性能,本文提出一种具有铠甲结构的碳包Co纳米颗粒的纳米管阵列自支撑材料(CC@Co-CNTs)的合成方法。先在碳布表面生长金属有机框架化合物,形成树叶状纳米片阵列前驱体,再经过双氰胺气相转化,得到多级自支撑纳米管材料。电化学测试表明,在1600 r/min条件下,该自支撑电极的半波电位高达0.78 V,极限电流密度为-12.14 mA/cm^(2),电容值约为CC@Co-NCNA材料的4.2倍,在超过500 min的连续测试中,电流保持率高达75.0%,并且具有良好的抗甲醇性能。碳包覆Co纳米颗粒的纳米管阵列的引入,不仅增加了表面积,并且保护催化剂。同时,碳纳米管构建了多级电解质离子的运输通道,缩短了电解质离子的传输路径,从而提高了电催化性能。As an efficient energy storage and conversion device,fuel cell is a new power source with broad application prospects in many fields.To design and regulate the structure and performance of carbon nanomaterials,a novel synthesis method for carbon-coated cobalt nanoparticle nanotube array self-supporting material(CC@Co-CNTs)with a armor structure was proposed in this paper.First,a leaf-shaped nanoplate array precursor was formed on the surface of carbon cloth by growing a metal-organic framework compound.Then,after the vapor phase transformation of diamine,a multi-level self-supporting nanotube material was obtained.Electrochemical testing showed that at 1600 r/m,the half-wave potential of the self-supporting electrode was as high as 0.78 V,the limiting current density was-12.14 mA/cm^(2),the capacitance value was about 4.2 times that of the CC@Co-NCNA material,and the current retention rate was as high as 75.0%after 500 min of continuous testing.It also had good resistance to methanol.This was attributed to the introduction of the carboncoated Co nanoparticle nanotube array,which not only increased the surface area but also protected the catalyst.Meanwhile,the carbon nanotubes formed multi-level ion transport channels for the electrolyte,effectively shortening the ion transport path and improving the electrocatalytic performance.

关 键 词：金属有机框架(MOFs) 多级材料 自支撑电极 电催化 

分 类 号：O646[理学—物理化学]