用于高性能电催化 CO2 还原的单原子催化剂中的配位环境,Small Structures

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用于高性能电催化 CO2 还原的单原子催化剂中的配位环境
Small Structures ( IF 13.9 ) Pub Date : 2022-11-18 , DOI: 10.1002/sstr.202200236
Soo Min Lee ₁ , Woo Seok Cheon ₁ , Mi Gyoung Lee _{1,

2} , Ho Won Jang _{1,

3}

Affiliation

二氧化碳的电化学还原 (EC CO ₂ RR) 是实现碳中和社会的一项很有前途的技术。EC CO ₂ RR 可以直接将烟囱排放的温室气体转化为有价值的燃料和化学原料，用于各种工业应用。_{已经研究了许多基于金属的电催化剂以降低过电势并提高CO 2}的产物选择性RR。最近，单原子催化剂 (SAC) 因其低成本、极高的单位负载量活性以及由于与配位原子的强化学相互作用而导致的催化活性位点的广泛稳定性而受到广泛关注。_{SAC 的配位环境影响活性位点的电子结构并改变 CO 2} RR 途径的能量学。_{本文首先讨论了 EC CO 2} RR的原理，包括反应机理、品质因数和电解系统。然后，访问了在各种支持上合成和表征 SAC 的最新进展。最重要的是，单金属原子的配位环境及其对CO _2的影响重点关注 RR 催化能力、产品选择性和活性位点稳定性。_{这篇综述从优化 EC CO 2} RR活性位点周围的原子配置的角度提供了 SAC 设计的里程碑。

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Coordination Environment in Single-Atom Catalysts for High-Performance Electrocatalytic CO2 Reduction

The electrochemical reduction of carbon dioxide (EC CO₂RR) is a promising technology to achieve a carbon-neutral society. EC CO₂RR can directly convert the greenhouse gas emitted from stacks into valuable fuels and chemical feedstocks for various industrial applications. Numerous metal-based electrocatalysts have been researched to reduce overpotential and enhance the product selectivity of CO₂RR. Recently, single-atom catalysts (SACs) are attracting intensive attention due to their low-cost, extremely high activities per loading amounts, and extensive stability of catalytic active sites due to the strong chemical interaction with coordination atoms. The coordination environments of SACs affect the electronic structure of active sites and change the energetics of the CO₂RR pathways. Herein, the principles of EC CO₂RR, including reaction mechanisms, figures of merits, and electrolysis systems, are first discussed. Then, the recent progress in the synthesis and characterization of SACs on various supports is accessed. Most importantly, the coordination environments of single-metal atoms and their influence on CO₂RR catalytic ability, product selectivity, and active site stabilization are focused. This review provides a milestone along the design of SACs from the perspective of optimizing atomic configuration surrounding the active sites for EC CO₂RR.

更新日期：2022-11-18

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