近日，浙江大学吴浩斌团队报道了选择性离子传输调节可实现酸中高电流密度CO₂到C₂₊的转化。2025年11月6日出版的《德国应用化学》杂志发表了这项成果。

酸性条件下的电化学二氧化碳还原反应（CO₂RR）是实现高效碳CO₂电解的重要途径。然而，剧烈的析氢竞争反应（HER）和缓慢的碳-碳耦合效率阻碍了酸性CO₂RR的发展。

研究组提出了一种离子输运调控策略，用于酸性电解液中高电流密度电解过程中阴极表面微环境的碳化。由（010）平面封闭的ZrO₂纳米片和Nafion组成的杂化层优先允许K⁺通过质子捕获和Donnan效应向阴极转移，同时在CO₂RR过程中富集K⁺并提高阴极表面的pH值。

这种富含K⁺的碱性微环境抑制了HER，有利于C₂₊产物的形成。特别是在改性铜电极上，C₂₊产物实现了近81%的法拉第效率，其分电流密度达484 mA cm^-2。研究组展示了提升酸性电解槽中二氧化碳电还原性能的有效策略，为实现高效可持续的二氧化碳转化提供了新途径。

附：英文原文

Title: Selective Ion Transport Regulation Enables High Current Density CO2-to-C2+ Conversion in Acid

Author: Yue Yang, Yanyang Qin, Yunhao Zhong, Xiangzhou Lv, Zhengjie Li, Qian Liu, Angjian Wu, Yaqiong Su, Hao Bin Wu

Issue&Volume: 2025-11-06

Abstract: Electrochemical carbon dioxide reduction reaction (CO2RR) under acidic condition offers great promise to achieve carbon-efficient CO2 electrolysis. However, acidic CO2RR has been hindered by the severe competing hydrogen evolution reaction (HER) and sluggish carbon–carbon coupling efficiency. Herein, an ion-transport regulation strategy has been developed to customize the microenvironment near cathode surface during high current density electrolysis in acidic electrolyte. A hybrid adlayer composed of (010) planes-enclosed ZrO2 nanosheets and Nafion preferentially allows K+ transport toward cathode through proton trapping and Donnan effect, thus simultaneously enriching K+ and raising pH near cathode surface during CO2RR. Such K+-rich and alkaline microenvironment suppresses HER and favors C2+ products formation. Particularly, a remarkable C2+ Faraday efficiency (FE) of nearly 81% has been achieved with a partial current density of 484 mA cm2 for C2+ products on modified Cu electrode. This work demonstrates an effective strategy to boost the CO2RR performance in acidic electrolyzers for efficient and sustainable CO2 conversion.

DOI: 10.1002/anie.202516139

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202516139