Electrochemical Reduction of Carbon Dioxide and Iron Oxide in Molten Salts to Fe/Fe<sub>3</sub>C Modified Carbon for Electrocatalytic Oxygen Evolution
Xinxin Liang, Juanxiu Xiao, Wei Weng, Wei Xiao
Abstract
Abstract Non‐noble electrocatalyst for the oxygen evolution reaction (OER) is essential for water electrolysis and electrochemical conversion of CO 2 . Integrating electrochemical fixation of CO 2 and electrochemical metallurgy to prepare advanced OER electrocatalyst is a promising solution to promote carbon neutrality and renewable energy. Herein, the electrochemical reduction of CO 2 and Fe 2 O 3 are combined in molten salts to prepare cathodic Fe 3 C‐based electrocatalyst and anodic oxygen at 600 °C with enhanced current efficiency. The resulting Fe 3 C‐based electrocatalyst outperforms precious electrocatalyst towards the OER operation in 1 M KOH due to a dynamic structural evolution to form an interface of Fe 3 C‐FeOOH.