Electrochemical carbon dioxide reduction to multicarbon products provides the storage of renewable energy in the form of chemical bonds, as well as a means to displace fossil sources of chemical feedstocks. However, the accompanying anodic oxygen evolution reaction (OER) reduces the energy efficiency of the process without providing a salable product. Replacing OER with alternative organic oxidation reactions (OORs) is an emerging strategy to reduce the full-cell potential and generate valuable products on both sides of the cell. We pursue carbon monoxide reduction that avoids carbonate formation and benefits from highly alkaline anode conditions favorable for OOR. This coelectrolysis strategy achieves a cathodic C₂₊ product stream (71% FE) and an anodic C₃ product stream (75% FE) at 180 mA cm^–2 with a full-cell potential of 1.34 V. The integrated system reduces the CO-to-C₂H₄ energy requirement by 55% (to ∼72 GJ/ton_C₂H₄), halving the projected energy cost of ethylene production from CO₂.

中文翻译：

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甘油氧化对与一氧化碳还原用于低压生成 C2 和 C3 产品流

将二氧化碳电化学还原为多碳产品，以化学键的形式存储可再生能源，并提供了一种替代化学原料化石来源的方法。然而，伴随的阳极析氧反应 (OER) 会降低该过程的能源效率，而不会提供可销售的产品。用替代有机氧化反应 (OOR) 代替 OER 是一种新兴策略，可降低全电池潜力并在电池两侧产生有价值的产品。我们追求减少一氧化碳，避免碳酸盐形成并受益于有利于 OOR 的高碱性阳极条件。这种共电解策略实现了阴极 C ₂₊产物流（71% FE）和阳极 C ₃180 mA cm ^{–2 下的}产物流 (75% FE)，全电池电位为 1.34 V。集成系统将 CO-to-C ₂ H ₄能量需求降低了 55%（至 ∼72 GJ/ton_C ₂ H ₄ )，将 CO ₂生产乙烯的预计能源成本减半。