Emerging Cu‐Based Tandem Catalytic Systems for CO<sub>2</sub> Electroreduction to Multi‐Carbon Products
Qingqing Qin, Hongli Suo, Lijia Chen, Yunxiao Wang, Jiazhao Wang, Huan Liu, Shi Xue Dou, Mengmeng Lao, Wei‐Hong Lai
Abstract
Abstract Conversion of carbon dioxide (CO 2 ) to valuable chemicals and feedstocks through electrochemical reduction holds promise for achieving carbon neutrality and mitigating global warming. C 2+ products are of interest due to their higher economic value. Since the CO 2 to C 2+ conversion process involves multiple steps, tandem catalytic strategies are commonly employed in the design of electrochemical CO 2 reduction reaction (CO 2 RR) catalysts and systems/reactors. Among the diverse catalysts that are capable of reducing CO 2 to CO, Cu stands out for more efficiently further converting CO to C 2+ products. In this review, the emerging Cu‐based tandem catalysts and their impact on CO 2 RR performance, focusing on three positional relationships are summarized. It delves into the integration of tandem catalytic strategies into membrane electrolyzers, utilizing catalyst‐coated substrate (CCS) and catalyst‐coated membrane (CCM) technologies. Several typical examples are presented to illustrate this integration. Finally, the challenges and prospects of applying tandem strategies in the development of CO 2 RR catalysts/systems, as well as their device‐level implementation are indicated.