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Non‐noble electrocatalyst for the oxygen evolution reaction (OER) is essential for water electrolysis and electrochemical conversion of CO2. Integrating electrochemical fixation of CO2 and electrochemical metallurgy to prepare advanced OER electrocatalyst is a promising solution to promote carbon neutrality and renewable energy. Herein, the electrochemical reduction of CO2 and Fe2O3 are combined in molten salts to prepare cathodic Fe3C‐based electrocatalyst and anodic oxygen at 600 °C with enhanced current efficiency. The resulting Fe3C‐based electrocatalyst outperforms precious electrocatalyst towards the OER operation in 1 M KOH due to a dynamic structural evolution to form an interface of Fe3C‐FeOOH.
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Liang et al. (2020) studied this question.
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