The chlorine evolution reaction (CER) is a crucial step in the production of chlorine gas and active chlorine by chlor-alkali electrolysis. Currently, the endeavor to fabricate electrodes capable of yielding high current density at minimal overpotential remains a central challenge in advancing the realm of chlorine evolution reactions. Here, we grow TiO 2 and RuO 2 on MXene@carbon cloth (CC) through the favorable affinity and induced deposition effect between the surface functional groups of MXene and the metal. A self-supported electrode (RuTiO 2 /MXene@CC) with strong binding at the electrocatalyst–support interface and weak adhesion at electrocatalyst–bubble interface is constructed. The RuTiO 2 /MXene@CC can reduce the electron density of RuO 2 by regulating the electron redistribution at the heterogeneous interface, thus enhancing the adsorption of Cl − . RuTiO 2 /MXene@CC could achieve a high current density of 1000 mA·cm − 2 at a small overpotential of 220 mV, superior to commercial dimensionally stable anodes (DSA). This study provides a new strategy for constructing efficient CER catalysts at high current density.
This work developed flexible porous carbon fiber composite electrodes (Pt@C-PES cathode/RuO2@C-PES anode) for hydrogen and chlorine evolution reactions (HER/CER) in acidic NaCl electrolyte (1 M HCl + 5 M NaCl). Functionalized with Pt and RuO2 via electrodeposition and drop-coating, the electrodes demonstrated low overpotentials of 71 mV@25 mA cm-2 (HER) and 77 mV@25 mA cm-2 (CER). Applied in a two-electrode H-cell system, Faradaic efficiencies of 99.14% (HER) and 98% (CER) were achieved at a current density of 25 mA cm-2, and 30 mL of iodine solution (66.25 mmol L-1) was obtained within 5 hours for extensive sterilization (5 types of bacteria). As antibacterial electrodes, in-situ generated active chlorine enabled 100% inactivation of Staphylococcus aureus within 30 minutes. The porous structure, good hydrophilicity and mechanical flexibility of the electrodes enhanced electrolyte penetration, catalytic activity and wearability. This study provides a high-performance flexible electrode for acidic NaCl electrolysis, reducing energy consumption while broadening applications in hydrogen/chlorine production and antibacterial applications.
危险品化学品经营许可证（带存储）