TY - JOUR AU - Wu, Zhizheng PY - 2026 TI - Cascade CO(2) electroreduction and downstream reactions for carbon product upgrading JO - Carbon Future SN - 2960-0561 SP - 9200075 VL - 3 IS - 2 AB - Electrochemical reduction of CO2/CO (eCO(2)R) powered by renewable electricity to produce value-added chemicals offers a promising pathway toward sustainable fuel production. Although advances in catalyst design and system engineering have enabled CO2/CO electroreduction to achieve high current densities for generating hydrocarbons and oxygenates, the products remain largely limited to small carbon molecules (C1–C3). Recently, significant progress has been made in cascading eCO(2)R with downstream reactions to expand the product spectrum toward polymeric or higher-value carbon products. However, comprehensive summaries and perspectives on these cascade systems remain scarce in the eCO(2)R literature. This review systematically summarizes recent developments in cascade eCO(2)R and downstream conversion. The advantages of integrating eCO(2)R with additional reaction steps are analyzed, followed by a discussion of representative systems that couple eCO(2)R with thermo-catalytic, biological, and electrochemical processes. Finally, the key challenges facing this emerging field are highlighted, along with perspectives on future research directions. UR - https://doi.org/10.26599/CF.2026.9200075 DO - 10.26599/CF.2026.9200075