The electrochemical reduction of CO₂ into value-added chemicals has been explored as a promising solution to realize carbon neutrality and inhibit global warming. This involves utilizing the electrochemical CO₂ reduction reaction (CO₂RR) to produce a variety of single-carbon (C₁) and multi-carbon (C₂₊) products. Additionally, the electrolyte solution in the CO₂RR system can be enriched with nitrogen sources (such as NO₃⁻, NO₂⁻, N₂, or NO) to enable the synthesis of organonitrogen compounds via C–N coupling reactions. However, the electrochemical conversion of CO₂ into valuable chemicals still faces challenges in terms of low product yield, poor faradaic efficiency (FE), and unclear understanding of the reaction mechanism. This review summarizes the promising strategies aimed at achieving selective production of diverse carbon-containing products, including CO, formate, hydrocarbons, alcohols, and organonitrogen compounds. These approaches involve the rational design of electrocatalysts and the construction of coupled electrocatalytic reaction systems. Moreover, this review presents the underlying reaction mechanisms, identifies the existing challenges, and highlights the prospects of the electrosynthesis processes. The aim is to offer valuable insights and guidance for future research on the electrocatalytic conversion of CO₂ into carbon-containing products of enhanced value-added potential.

中文翻译：

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CO2电解还原产品提高附加值、扩大范围策略回顾

将CO ₂电化学还原为增值化学品已被探索作为实现碳中和和抑制全球变暖的有前景的解决方案。这涉及利用电化学CO ₂还原反应(CO ₂ RR) 来生产各种单碳(C ₁ ) 和多碳(C ₂₊ ) 产品。此外，CO ₂ RR系统中的电解质溶液可以富含氮源（例如NO ₃ ^-、NO ₂ ^-、N ₂或NO），从而能够通过C-N偶联反应合成有机氮化合物。然而，CO ₂电化学转化为有价值的化学品仍然面临着产物收率低、法拉第效率（FE）差以及反应机理不清楚等挑战。本综述总结了旨在实现选择性生产多种含碳产品（包括二氧化碳、甲酸盐、碳氢化合物、醇和有机氮化合物）的有前景的策略。这些方法涉及电催化剂的合理设计和耦合电催化反应系统的构建。此外，这篇综述介绍了潜在的反应机制，确定了现有的挑战，并强调了电合成过程的前景。其目的是为未来将CO ₂电催化转化为具有增强增值潜力的含碳产品的研究提供有价值的见解和指导。