和Zn促进了电催化CO2减少的Al-酸金属有机框架
Ung Thi Dieu Thuy1, Tran Ngoc Huan2, Sandrine Zanna3
1Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam dieuthuy@ims.vast.vn liemnq@vast.vn.
RSC advances
|January 23, 2024
概括
本研究介绍了改性金属有机框架 (MOFs) 作为将二氧化碳 (CO2) 转化为有价值的碳化合物的催化剂. 这种Cu-Zn@Al-fum MOF表现出高效率和改善了CO2电还原的催化剂稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 金属有机框架 (MOF) 为催化应用提供可调节的特性.
- 电催化减少二氧化碳 (CO2) 对可持续能源和化学品生产至关重要.
- 为二氧化碳转化开发高效和选择性的催化剂仍然是一个重大挑战.
研究的目的:
- 为了合成和描述Cu和Zn修饰的Al-fumarate (Al-fum) MOFs用于CO2的电还原.
- 研究Cu和Zn在一个级联电催化过程中的协同效应.
- 为了评估Cu-Zn@Al-fum催化剂的性能和稳定性,用于二氧化碳转化.
主要方法:
- 合成Al-fumarate (Al-fum) MOFs. 这种酸的合成.
- 引入Cu和Zn纳米粒子 (NP) 使用双溶剂方法进行内孔沉积.
- 使用气体扩散电极进行电化学研究,以评估二氧化碳的电还原活性.
- 产品分析以确定选择性和法拉达效率 (FE).
主要成果:
- -Zn@Al-fum MOFs已成功合成并表现出用于CO2电还原的活性.
- 催化剂实现了最高的法拉达效率 (FE) 62%的二氧化碳转化为CO,HCOOH,CH4,C2H4和C2H5OH在-1.0V与RHE.
- 在pH值6.8.8下,观察到CH4,C2H4和C2H5OH的生成率为28%.
- 通过在操作过程中最大限度地减少金属聚合,Al-fum MOF矩阵提高了催化剂的稳定性.
结论:
- Cu 和 Zn 修改的 Al-fum MOF 是二氧化碳电还原的有效多功能催化剂.
- 由MOF结构促进的Cu和Zn之间的协同效应使选择性产品形成的级联过程成为可能.
- 强大的Al-fum矩阵提高了电催化剂的耐用性,为实际的二氧化碳转化技术铺平了道路.
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