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调整局部CO2度通过可控制的湿度来探索CO2中的多碳产品选择性

Shijian Yu^1,2, Kai Deng², Dong Liu²

¹State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China.

ACS applied materials & interfaces

|February 27, 2026

概括

超疏水电极通过保持高表面二氧化碳度,提高了二氧化碳转化为多碳产品的速度. 这一策略通过控制当地pH值来提高选择性,这对于有价值的化学品生产至关重要.

科学领域:

电化学电化学电化学
催化剂是一种催化剂.
表面科学是一门学科.

背景情况:

通过电化学方法将二氧化碳 (CO2) 转化为多碳产品,为可再生能源储存和化学合成提供了一条途径.
表面二氧化碳度和局部pH在实现多碳产品高选择性方面的确切作用尚不清楚.

研究的目的:

解和研究表面二氧化碳度和局部pH对多碳产品选择性的不同贡献.
设计电极表面以提高二氧化碳电减性能.

主要方法:

使用现场光电化学光谱和现场拉曼光谱来监测反应.
调整了电极表面的湿透度,以调节界面二氧化碳转移.
超电极与常规铜 (Cu) 电极的性能比较.

主要成果:

超疏水电极保持了显著更高的表面二氧化碳度.
超疏水表面的快速二氧化碳转移缓冲了当地的pH值,这最初被认为对多碳产品不利.
实现了66.5%的多碳产品选择性,比传统的Cu电极高1.93倍.
运行拉曼光谱检测显示,在超疏水表面上,二氧化碳的激活和中介物 (Cu-CO,CO2-) 的形成增强.

结论:

高表面二氧化碳度,由超疏水表面维持,是促进二氧化碳激活和随后的多碳产品形成的关键因素.
表面湿度工程提供了一种有效的策略来控制微环境,以增强二氧化碳的电还原.
该研究阐明了表面二氧化碳度,局部pH值和二氧化碳电催化中的产品选择性之间的相互作用.

关键词:

减少二氧化碳的减少当地的二氧化碳度.当地的pH值.多碳产品的选择性多碳产品的选择性湿透性湿透性湿透性湿透性

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