Fundamentals of Electrochemical CO2 Reduction on Single-Metal-Atom Catalysts,ACS Catalysis

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Fundamentals of Electrochemical CO2 Reduction on Single-Metal-Atom Catalysts
ACS Catalysis ( IF 11.3 ) Pub Date : 2020-08-06 , DOI: 10.1021/acscatal.0c02643
Tu N. Nguyen _{1,

2} , Mahdi Salehi ₃ , Quyet Van Le ₄ , Ali Seifitokaldani ₃ , Cao Thang Dinh ₁

Affiliation

Electrochemical carbon dioxide (CO₂) reduction powered by renewable electricity offers a path to produce valuable products from CO₂—an earth-scale human waste—and to store intermittent renewable energy in the form of chemical fuels. Recently, single metal atoms (SMAs) immobilized on a conductive substrate have been shown as effective catalysts for the electrochemical CO₂ reduction, opening the door to a generation of low-cost and high-performance catalysts for fuel and chemical production. The unique physical and chemical properties of a single-atomic structure and the homogeneity of the active sites, combined with tunable coordination environments, are essential for realizing highly active and selective catalysts. In this Review, we focus on the structure–performance relationship in SMA catalysts for CO₂ reduction from both theoretical and experimental aspects. We discuss why SMA catalysts exhibit a distinct catalytic performance compared to their counterpart nanoparticles. Recent strategies for improving the CO₂ reduction selectivity and activity by tuning the nature and coordination environment of SMA active sites are described. Finally, we highlight potential applications of SMA catalysts in practical CO₂ reduction conditions, critical challenges, and the path toward efficient electrochemical CO₂ reduction catalysis based on SMAs.

中文翻译：

单金属原子催化剂上电化学还原CO _2的基础知识

由可再生电力驱动的减少电化学二氧化碳（CO ₂）提供了一条途径，可以从地球规模的人类废物CO ₂生产有价值的产品，并以化学燃料的形式存储间歇性可再生能源。最近，固定在导电基材上的单金属原子（SMA）已被证明是电化学CO _2的有效催化剂。减少排放量，为一代低成本，高性能的燃料和化学生产催化剂打开了大门。单原子结构的独特物理和化学性质以及活性位点的均一性，以及可调节的配位环境，对于实现高活性和选择性的催化剂至关重要。在这篇综述中，我们从理论和实验两个方面着眼于SMA催化剂中CO ₂还原的结构-性能关系。我们讨论了为什么SMA催化剂与其对应的纳米颗粒相比具有独特的催化性能。改善CO _2的最新策略描述了通过调节SMA活性位点的性质和配位环境来降低选择性和活性。最后，我们重点介绍了SMA催化剂在实际CO ₂还原条件下的潜在应用，关键挑战以及基于SMA的高效电化学CO ₂还原催化的途径。

更新日期：2020-09-05

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