Roles of copper(I) in water-promoted CO₂ electrolysis to multi-carbon compounds.

IF 14.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Nature Communications Pub Date : 2024-11-15 DOI:10.1038/s41467-024-54282-2

Xiaoyang He, Li Lin, Xiangying Li, Minzhi Zhu, Qinghong Zhang, Shunji Xie, Bingbao Mei, Fanfei Sun, Zheng Jiang, Jun Cheng, Ye Wang

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Abstract

The membrane electrode assembly (MEA) is promising for practical applications of the electrocatalytic CO₂ reduction reaction (CO₂RR) to multi-carbon (C₂₊) compounds. Water management is crucial in the MEA electrolyser without catholyte, but few studies have clarified whether the co-feeding water in cathode can enhance C₂₊ formation. Here, we report our discovery of pivotal roles of a suitable nanocomposite electrocatalyst with abundant Cu₂O-Cu⁰ interfaces in accomplishing water-promoting effect on C₂₊ formation, achieving a current density of 1.0 A cm^-2 and a 19% single-pass C₂₊ yield at 80% C₂₊ Faradaic efficiency in MEA. The operando characterizations confirm the co-existence of Cu⁺ with Cu⁰ during CO₂RR at ampere-level current densities. Our studies reveal that Cu⁺ works for water activation and aids C‒C coupling by enhancing formations of adsorbed CO and CHO species. This work offers a strategy to boost CO₂RR to C₂₊ compounds in industrial-relevant MEA by combining water management and electrocatalyst design.

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铜（I）在水促进二氧化碳电解多碳化合物中的作用。

膜电极组件（MEA）在多碳（C2+）化合物的电催化二氧化碳还原反应（CO2RR）的实际应用中大有可为。在不含阴极溶解液的 MEA 电解槽中，水的管理至关重要，但很少有研究阐明阴极中的共进水是否能促进 C2+ 的形成。在此，我们报告了我们发现的一种具有丰富 Cu2O-Cu0 界面的合适纳米复合电催化剂在实现水促进 C2+ 形成效果方面的关键作用，在 MEA 中实现了 1.0 A cm-2 的电流密度和 19% 的单程 C2+ 产量，C2+ 法拉效率为 80%。操作表征证实，在安培级电流密度的 CO2RR 过程中，Cu+ 与 Cu0 共存。我们的研究表明，Cu+ 可促进水活化，并通过增强吸附 CO 和 CHO 物种的形成来帮助 C-C 耦合。这项工作提供了一种策略，通过将水管理与电催化剂设计相结合，在与工业相关的 MEA 中促进 CO2RR 到 C2+ 化合物。

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来源期刊

Nature Communications Biological Science Disciplines-

CiteScore

24.90

自引率

2.40%

发文量

6928

审稿时长

3.7 months

期刊介绍： Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.