Seawater electrolysis assisted by NiMn MOF-mediated urea oxidation
To address the issues of electrode corrosion caused by chloride ions and chlorine evolution reaction during seawater electrolysis,a corrosion-resistant NiMn MOF-300/NF on nickel foam was created through hydrothermal and annealing processes.This material was used as an electrocatalyst for urea oxidation,which has a lower oxidation potential compared to anodic oxidation.By utilizing urea oxidation,the chlorine evolution reaction was effectively suppressed,leading to a significant reduction in energy consumption during seawater electrolysis.The catalyst exhibits a voltage requirement of only 1.37 V at a current density of 200 mA/cm2,which is 340 mV lower than the overpotential observed in seawater electrolysis alone.Furthermore,the catalyst demonstrates exceptional electrocatalytic activity and stability,as it can sustain the reaction continuously for 48 hours at a current density of 50 mA/cm2 without any noticeable decrease in performance.This approach provides new insights for the practical implementation of large-scale seawater electrolysis.
electrolysis of seawaterurea oxidation reactionhydrothermal methodstability
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