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定制聚合物粘合剂的永久选择性气体扩散电极的低度CO2电解

Hadi Shaker Shiran¹, Shariful Kibria Nabil¹, Tareq Al-Attas¹

¹Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, Alberta, T2N 1N4, Canada.

|October 21, 2025

概括

一个具有永久选择性层的新型气体扩散电极增强了来自稀释流的电化学二氧化碳减排 (eCO2R). 这提高了工业应用的二氧化碳转化效率和耐用性.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.

背景情况:

电化学二氧化碳减排 (eCO2R) 将工业二氧化碳排放转化为有价值的化学品.
低度二氧化碳流的直接电解面临着大规模运输的限制和低的法拉第效率 (FE).

研究的目的:

开发一种具有永久选择性层的气体扩散电极,以提高催化剂界面上的二氧化碳度.
为了优化CO2 / N2选择性和透性,使用不同的聚合物矩阵与CO2可爱金属有机框架.

主要方法:

在Nafion,聚硫 (PSF) 和 styrene-ethylene-butylene-styrene聚合物矩阵中整合卡尔加里框架-20 (CALF-20) 的永久选择性层的制造.
对聚合物矩阵进行系统测试,以评估CO2/N2选择性和透性.
在膜电极组件中评估电化学性能,包括部分电流密度和法拉第效率.

主要成果:

该CALF-20/PSF复合物实现了大约40的CO2/N2选择性.
与未经修改的电极相比,在10%的CO2料中观察到CO部分电流密度增加了三倍 (jCO为-42.7 mA cm-2).
优化的电极在20个多小时内保持了约70%的稳定的FE_CO.

结论:

CALF-20/PSF永久选择性层有效地集中了二氧化碳,克服了大规模运输的限制.
CALF-20和PSF之间强烈的相互作用增强了CO2传输和电极耐用性.
这项技术为从稀释的工业二氧化碳流中获得高效的eCO2R提供了一个有希望的解决方案.

关键词:

电解是一种电解.瘦的二氧化碳二氧化碳.金属-有机-框架选择性选择性选择性一个聚合物聚合物.

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