Metal–Organic Framework Derived Cu−Ag Interface for Selective Carbon Monoxide Electroreduction to Acetate

作者：Chang Liu, Wei Yan, Wen Yan, Zhongliang Huang, Bo Chen, Yunhua Li, Xiaoqing Huang · 发表于：Chemistry - A European Journal · 年份：2023 · DOI：10.1002/chem.202301456 · 被引用次数：12 · 研究领域：CO2 Reduction Techniques and Catalysts、Metal-Organic Frameworks: Synthesis and Applications、Advanced Photocatalysis Techniques

Abstract Electrochemical carbon monoxide reduction reaction (CORR) is a potential way to obtain high‐value multi‐carbon (C 2+ ) products. However, achieving high selectivity to acetate is still a challenge. Herein, we develop a two‐dimensional Ag‐modified Cu metal–organic framework (Ag 0.10 @CuMOF‐74) that demonstrates Faradaic efficiency (FE) for C 2+ products up to 90.4 % at 200 mA cm −2 and an acetate FE of 61.1 % with a partial current density of 122.2 mA cm −2 . Detailed investigations show that the introduction of Ag on CuMOF‐74 favors the generation of abundant Cu−Ag interface sites. In situ attenuated total reflection surface enhanced infrared absorption spectroscopy confirms that these Cu−Ag interface sites improve the coverage of *CO and *CHO and the coupling between each other and stabilize key intermediates *OCCHO and *OCCH 2 , thus significantly promoting to the acetate selectivity on Ag 0.10 @CuMOF‐74. This work provides a high‐efficiency pathway for CORR to C 2+ products.