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Abstract Electrochemical carbon dioxide (CO 2 ) reduction offers a low‐carbon route to ethylene, when powered from renewable energy. Yet, the best‐performing CO 2 electrolysis systems employ neutral or alkaline electrolytes, resulting in low conversion efficiencies, which increases downstream separation costs. High conversion rates can be achieved with acidic electrolytes, albeit at the cost ethylene faradaic efficiency (FE 65 h at industrial current densities combined with a high ethylene concentration in the product stream showcases promising industrial viability.
Papangelakis et al. (Tue,) studied this question.
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