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工程多价铜催化剂从Cu-MOF向高性能C电合成

Hui-Hui Cao¹, Zhen-Hong He¹, Rui-Peng Yan¹

¹Shaanxi Key Laboratory of Chemical Additives For Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science & Technology, Xi'an, China.

Angewandte Chemie (International ed. in English)

|March 2, 2026

概括

这项研究提出了一种基于Cu的新型催化剂 (Cu-MOF/Cu_xO/CF-40),用于高效的电催化CO₂还原反应 (ECO₂RR),通过稳定多价铜物种,实现对C₂₊产品的高选择性.

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
催化剂是一种催化剂.

背景情况:

电催化CO2还原反应 (ECO2RR) 对于将CO2转化为有价值的化学物质至关重要.
在 ECO RR 中实现 C₂₊ 产品的高选择性仍然是一个重大挑战.
有多价值Cu的Cu基催化剂是有前途的,但需要精确调整和稳定活性物种.

研究的目的:

为选择性ECO₂化学品开发一种高效的基于Cu的催化剂.RR到C₂化学品.
稳定多价值Cu物种以提高催化剂性能和寿命.
在CO2减少过程中识别关键的中间体和反应途径.

主要方法:

一种基于Cu的新型催化剂 (Cu-MOF/Cu_xO/CF-40) 的合成,在Cu薄膜上结合了Cu-MOF和Cu_xO物种.
在 ECO₂RR 中对催化剂性能进行电化学评估,包括法拉第效率和电流密度.
在现场ATR-FTIR光谱和密度函数理论 (DFT) 计算以阐明反应机制和识别中间体.

主要成果:

Cu-MOF/Cu_xO/CF-40催化剂实现了高达91.8%的总C₂法拉代效率 (FE_C2) 和34.6mA·cm^-2的电流密度在-1.1V.
催化剂有效地利用多价值Cu物种 (Cu₂₊₁O和CuO) 进行CO₂吸附,激活和提高导电性.
-MOF成分在稳定多价值和确保长期催化剂性能方面发挥着至关重要的作用.
现场研究和DFT计算确定了*OCCOH作为关键的C-C合中间体.

结论:

开发的Cu-MOF/Cu_xO/CF-40催化剂在转化CO_{2到C_{2方面表现出高效率和选择性.}}
通过Cu-MOF稳定多价值Cu物种是提高ECO₂RR性能的一种可行的策略.
这项工作提供了一个合理的设计方法,用于设计稳定和选择性的基于Cu的电催化剂,用于CO2利用.

关键词:

C2 化学物质的使用.二氧化碳的电还原 CO2 的电还原.在Cu2+1O中.这就是CuOO的意思.在Cu-MOF中使用.

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