Design of Efficient and Stable Titanium‐Based Electrodes for Industrial‐Scale Electrocatalytic Water Oxidation

It is challenging that how to construct corrosion‐resistant and cost‐effective catalytic electrodes for oxygen/chlorine evolution reaction (OER/CER) in industrial‐scale applications. In this work, the sol–gel method can be used to rapidly construct high‐efficiency industrial‐grade stable Ti‐based anodes Ru 5 Ir 5 Mo 5 @Ti at 450 °C for 2 h. The doping of Mo element lowered surface oxygen's vacancy formation energy, thereby facilitating an additional hydrolysis pathway assisted by lattice oxygen vacancies. This enhancement led to improved selectivity and specific activity for CER under conditions of high concentration doping. Additionally, it decreased the binding energy of OER intermediates on the neighboring ruthenium active sites. To achieve 10 mA cm −2 , the overpotentials of CER and OER were only 183 mV (5.0 M NaCl) and 257 mV (1.0 M KOH + 0.5 M NaCl). What's more, Ru 5 Ir 5 Mo 5 @Ti electrodes catalyze stably at industrial‐grade current densities in neutral and alkaline electrolytes for more than 72 h at 200 mA cm −2 and 144 h at 250 mA cm −2 , respectively, with ultralow performance attenuation. Further industrial‐grade evaluation of CER showed its Cl 2 evolution polarizability, enhanced lifespan, and enhanced weight loss can meet necessary requirements, providing new opportunities for large‐scale industrial applications.