Understanding the roles of ionic liquids in photocatalytic CO2 reduction

IF 10.7 2区 材料科学 Q1 CHEMISTRY, PHYSICAL
Yun Zhao, Huihu Wang, Lei Zeng and Limin Huang
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Abstract

Artificial photosynthesis for the production of value-added chemicals from CO2 feedstock represents a promising approach toward achieving carbon neutrality. Nevertheless, the initial challenge lies in the capture and activation of CO2, which is crucial for facilitating highly efficient conversion. Ionic liquids (ILs) are emerging as potential platforms for CO2 capture and activation due to their diverse ion pairs, which assist in the synthesis and morphological control of photocatalysts, thereby exposing more active sites. Their tunable hydrophilicity and hydrophobicity create a confined environment around the catalyst, enabling selective control over the diffusion of reactants, intermediates, and products to the active sites. Additionally, the electronic structure of the photocatalyst can be adjusted through the careful selection of IL cations and anions, effectively reducing the activation energy barrier for CO2 or optimizing the reaction pathway. Thus, three key roles of ionic liquids are thoroughly examined in this review. Furthermore, the underlying mechanism is also elucidated to facilitate a profound understanding of the photocatalytic CO2 reduction process.

Abstract Image

离子液体在光催化CO2还原中的作用
从二氧化碳原料中生产增值化学品的人工光合作用是实现碳中和的一种有希望的方法。然而,最初的挑战在于二氧化碳的捕获和活化,这对于促进高效转化至关重要。离子液体(ILs)由于其不同的离子对,有助于光催化剂的合成和形态控制,从而暴露出更多的活性位点,从而成为CO2捕获和活化的潜在平台。它们可调节的亲疏水性在催化剂周围创造了一个受限的环境,从而可以选择性地控制反应物、中间体和产物向活性位点的扩散。此外,通过精心选择IL阳离子和阴离子,可以调整光催化剂的电子结构,有效降低CO2的活化能势垒或优化反应途径。因此,本文对离子液体的三个关键作用进行了深入的探讨。此外,还阐明了其潜在的机制,以促进对光催化CO2还原过程的深刻理解。
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来源期刊
Journal of Materials Chemistry A
Journal of Materials Chemistry A CHEMISTRY, PHYSICAL-ENERGY & FUELS
CiteScore
19.50
自引率
5.00%
发文量
1892
审稿时长
1.5 months
期刊介绍: The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.
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