Navigating CO utilization in tandem electrocatalysis of CO2
Navigating CO utilization in tandem electrocatalysis of CO2
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DOI：
10.1016/j.trechm.2022.12.003
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发表时间：
2023-01
影响因子：
15.7
通讯作者：
Tianyu Zhang;Zhengyuan Li;Ashok Kumar Ummireddi;Jingjie Wu
中科院分区：
文献类型：
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作者：
Tianyu Zhang;Zhengyuan Li;Ashok Kumar Ummireddi;Jingjie Wu
在Cu催化剂上的CO2-至-C2+产物的转化主要由于缓慢的C-C偶联动力学而遭受有限的C2+选择性和生产率。连续级联CO2-至-C2+产物转化，在两种不同但互补的催化剂上串联整合第一步骤CO2-至-CO和第二步骤CO-至-C2+转化，已被广泛接受为提高促进C-C偶联速率的 *CO覆盖率的有效方法。本文讨论了串联系统减少二氧化碳的机理和设计原则，重点关注一个电解槽中的串联减少。首先，我们分析了吸附的 *CO在C-C耦合过程中的关键作用。其次，深入探讨了CO2串联还原系统的核心设计原则：提高CO利用效率，以改善CO中间体传输为导向，平衡CO生成率和利用率，匹配两个独立催化剂之间的CO生成和利用过电位。第三，介绍了目前广泛应用的串联催化剂和电极的制备技术。最后，我们提供了一些关于CO2串联减排前景的观点。
The transformation of CO2-to-C2+products on Cu catalysts suffers from limited C2+selectivity and productivity due largely to sluggish C–C coupling kinetics. Sequential cascade CO2-to-C2+product conversion, integrating the first step CO2-to-CO and second step CO-to-C2+conversion in series on two distinct but complementary catalysts has been widely accepted as an effective approach to improve the *CO coverage that facilitates the C–C coupling rate. This review addresses the mechanism and design principles of tandem systems for CO2reduction, with a focus on tandem reduction in one electrolyzer. First, we analyze the crucial role of the adsorbed *CO in the C–C coupling process. Second, we thoroughly discuss the core design principle of the CO2tandem reduction systems: enhancing the CO utilization efficiency, navigated by improving CO intermediate transport, balancing the CO generation and utilization rate, and matching the CO generation and utilization overpotential between two independent catalysts. Third, we introduce the widely used technique to prepare the tandem catalysts and electrodes. Finally, we offer some perspectives on the outlook for CO2tandem reduction.