钴掺杂铜基复合材料的制备及其电催化析氧性能
Synthesis and electrocatalytic oxygen evolution performance of cobalt doped copper-based composites
张海成 1杨邦志 1张娇 1高鹏 1向万夏 1郭婷 1徐海涛1
作者信息
- 1. 陕西理工大学 化学与环境科学学院,陕西省催化基础与应用重点实验室,汉中 723001
- 折叠
摘要
铜基纳米材料在电催化方面受到广泛关注,但其存在催化活性低和稳定性差的问题,探索简单高效的策略解决上述问题具有重要的实际意义.本文在室温条件下,采用Co-MOF材料在CuCl2 溶液中水解刻蚀策略成功在泡沫镍基底上构筑了钴掺杂的碱式氯化铜/氯化亚铜复合材料.通过改变Co-MOF在CuCl2 溶液中的水解刻蚀时间,从而调控物种和复合物的形貌结构.最优催化剂仅需 238 mV的过电位便能够驱动100 mA·cm-2 的电流密度.经过 50 h的稳定性测试,电流密度几乎没有下降,表明其具有良好的稳定性.优异的电催化析氧反应(OER)性能可归属于Co原子的掺杂优化了Cu原子周围电子环境,激活碱式氯化铜和氯化亚铜的催化活性及CuCl2 对泡沫镍的刻蚀增加了活性位点.本文为铜基电催化材料的制备和电催化OER活性增强提供了新的思路和策略.
Abstract
Copper-based nanomaterials have received much attention in electrocatalysis,but they suffer from low catalytic activity,unstable structures,and poor stability,and it is of great practical importance to explore simple and efficient strategies to solve these problems.In this study,a Co-MOF material was used to successfully construct co-balt-doped Cu2Cl(OH)3/CuCl composite materials on a nickel foam substrate through a hydrolysis-etching strategy in a CuCl2 solution at room temperature.By varying the hydrolysis-etching time of Co-MOF in the CuCl2 solution,the morphology and structure of the species and composites were controlled.The optimized catalyst only requires an overpotential of 238 mV to drive a current density of 100 mA·cm-2.After 50 h of stability testing,the current density hardly decreases,indicating excellent stability.The excellent electrocatalytic oxygen evolution reaction(OER)performance can be attributed to the cobalt atom doping,which optimizes the electronic environment around the copper atoms,activating the catalytic activity of Cu2Cl(OH)3 and CuCl,as well as the CuCl2 etching of the nickel foam,which increases the active sites.This study provides new ideas and strategies for the preparation of copper-based electrocatalytic materials and enhancing their electrocatalytic OER activity.
关键词
金属有机框架材料/铜基材料/析氧反应/掺杂/协同作用/电催化Key words
metal organic framework materials/copper-based materials/oxygen evolution reaction/doping/synergistic effects/electrocatalysis引用本文复制引用
基金项目
陕西省自然科学基金(2022JQ-148)
陕西省教育厅基金(22JK0311)
陕西理工大学人才启动项目(SLGRCQD2108)
陕西省大学生创新创业训练计划(S202210720094)
秦巴生物资源与生态环境国家重点实验室(培育)"市校共建"科研专项(SXJ-2304)
出版年
2024
NETL
NSTL
万方数据