Electrocatalytic CO 2 Reduction into Value‐Added Chemicals: Selectivity Tuning, Efficiency Improvement, and Scalability Challenge

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Abstract
The electrocatalytic CO 2 reduction reaction (CO 2 RR) offers a sustainable pathway to convert CO 2 into value‐added chemicals. However, a systematic categorization of the resulting chemical products, along with comprehensive strategies toward high efficiency and selectivity of CO 2 RR has yet to be fully established. Herein, this review systematically summarizes recent advances in CO 2 RR, covering products from C 1 compounds to C 2+ chemicals generated via C–C coupling. Subsequently, special emphasis is placed on steering post‐coupling pathways to selectively produce ethylene or ethanol, as well as mechanisms for carbon‐chain extension toward C 3 products like n‐propanol. Moreover, multifactor strategies to enhance CO 2 RR efficiency, including suppressing hydrogen evolution, rational catalyst design, electrolyte microenvironment modulation, and flow cell reactor integration are dissected. Finally, key scientific challenges and techno‐economic barriers of this carbon‐neutral technology are highlighted.
Funding Information
  • Natural Science Foundation of Jiangsu Province (BK20250879)
  • Jiangsu University (5501510024)

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