咪唑配体修饰的Cu2O催化剂通过局部*CO富集增强CO2电还原中C2+的选择性

Rongzhen Chen, Ling Zhang and Yuhang Li
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引用次数: 0

摘要

电化学CO2还原(CO2RR)合成多碳产品是二氧化碳可持续利用的重要途径,但同时实现高选择性和高电流密度仍然是一个挑战。虽然提高催化剂上的*CO覆盖是促进C-C耦合的关键,但中间富集和微环境调节之间的动态竞争需要创新的策略。本研究采用表面配体工程技术,利用具有不同长度烷基侧链的咪唑基离子液体,在Cu2O催化剂上构建了可调疏水微环境。优化后的OMIm-Cu2O催化剂在碱性介质中C2+选择性为63.3%,在酸性介质中C2+选择性为30.7%。机理研究表明疏水长链配体提高了局部*CO浓度,促进了高效的C-C偶联。这项工作强调了微环境调制是一种可行的途径,可以弥合CO2RR中高效率和工业电流密度性能之间的差距。关键词:电化学CO2还原;C2+产物选择性;铜基催化剂;* CO浓度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Imidazolium ligand-modified Cu2O catalysts for enhancing C2+ selectivity in CO2 electroreduction via local *CO enrichment†

Imidazolium ligand-modified Cu2O catalysts for enhancing C2+ selectivity in CO2 electroreduction via local *CO enrichment†

Electrochemical CO2 reduction (CO2RR) to synthesize multicarbon products is a critical route for sustainable CO2 utilization, yet achieving high selectivity and current density simultaneously remains challenging. While enhancing *CO coverage on catalysts is pivotal for promoting C–C coupling, the dynamic competition between intermediate enrichment and microenvironment regulation necessitates innovative strategies. Here, we employ surface ligand engineering to construct a tunable hydrophobic microenvironment on Cu2O catalysts, using imidazolium-based ionic liquids with alkyl side chains of varying lengths. The optimized OMIm-Cu2O catalyst achieves a C2+ selectivity of 63.3% in alkaline media and 30.7% in acidic media. Mechanistic studies reveal that hydrophobic long-chain ligands elevate local *CO concentration, facilitating efficient C–C coupling. This work highlights microenvironment modulation as a viable pathway to bridge the gap between high efficiency and industria–current–density performance in CO2RR.

Keywords: Electrochemical CO2 reduction; C2+ product selectivity; Copper-based catalysts; *CO concentration.

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Industrial Chemistry & Materials
Industrial Chemistry & Materials chemistry, chemical engineering, functional materials, energy, etc.-
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期刊介绍: Industrial Chemistry & Materials (ICM) publishes significant innovative research and major technological breakthroughs in all aspects of industrial chemistry and materials, with a particular focus on the important innovation of low-carbon chemical industry, energy and functional materials. By bringing researchers, engineers, and policymakers into one place, research is inspired, challenges are solved and the applications of science and technology are accelerated. The global editorial and advisory board members are valued experts in the community. With their support, the rigorous editorial practices and dissemination ensures your research is accessible and discoverable on a global scale. Industrial Chemistry & Materials publishes: ● Communications ● Full papers ● Minireviews ● Reviews ● Perspectives ● Comments
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