Metal Salen Electrocatalysts for Electro-reduction of Carbon Dioxide

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-04-14 DOI:10.1007/s10562-025-04996-9

Kantima Chitchak, Kattarinya Jaisabuy, Parichatr Vanalabhpatana

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Abstract

This research focuses on utilizing and evaluating copper(II) salen as an electrocatalyst for carbon dioxide (CO₂) electro-reduction, compared to other metal salen complexes, including cobalt(II) salen and nickel(II) salen. Copper(II) salen was successfully synthesized, characterized, and applied as a homogeneous electrocatalyst for the electro-reduction of CO₂ in non-aqueous solution. The efficiency of metal salen electrocatalysts and the effect of central metal ions were discussed. Among the salen complexes, copper(II) salen showed the best electrocatalytic activity for CO₂ electro-reduction by giving the highest current enhancement in cyclic voltammetric studies. Under the optimized applied potential and the presence of HFIP as a proton donor, controlled-potential electrolysis of CO₂ by electrogenerated copper(I) species yielded carbon monoxide and methane in the gas phase as well as formate ion and oxalate ion in the liquid phase. Furthermore, X-ray diffraction (XRD) analysis, scanning electron microscopy-energy dispersive X-ray (SEM-EDX) spectroscopy, and X-ray photoelectron spectroscopy (XPS) were employed to reveal the morphological and structural information of the electrocatalyst.

Graphical Abstract

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二氧化碳电还原用金属萨伦电催化剂

本研究的重点是利用和评价铜（II） salen作为二氧化碳（CO2）电还原的电催化剂，并与其他金属salen配合物，包括钴（II） salen和镍（II） salen进行比较。成功地合成了铜（II） salen，并对其进行了表征，并将其作为一种均相电催化剂用于非水溶液中CO2的电还原。讨论了金属萨伦电催化剂的效率和中心金属离子的影响。在这些配合物中，铜（II） salen对CO2电还原的电催化活性最好，在循环伏安研究中给出了最大的电流增强。在优化的应用电位和HFIP作为质子供体存在的条件下，电生铜(I)对CO2的控制电位电解在气相中产生一氧化碳和甲烷，在液相中产生甲酸离子和草酸离子。利用x射线衍射（XRD）、扫描电镜-能谱（SEM-EDX）和x射线光电子能谱（XPS）分析了电催化剂的形态和结构信息。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.