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This work examines the ozone electrogeneration(OE) at a binary coating of different nominal compositions(Pt)x-(TaOy)(100-x), where x(percentage in the precursor solution) varied between 1% and 100%, coated on titanium substrate prepared by a sol-gel technique. TheOE is performed in an artificial tap water at room temperature(25C). The percentages of Pt and TaOy in the coating significantly affect the electrocatalytic activity towards oxygen evolution. The oxygen evolution was retarded to a different extent based on the electrode composition. The largest retardation was obtained at the(Pt)10-(TaOy)90 electrode(ca. 480 m V positive shift) as compared with the(Pt)100-(TaOy)0 electrode.This was reflected in a high current efficiency(CE) ofOE(ca. 19.3%) at the former electrode. This value is considered to be among the highest values reported forOE at 25C in neutral media. The composite electrodes were characterized by voltammetric and surface techniques. A plausible explanation for the change of the efficiency ofOE with the electrode composition is given based on the electrochemical results.
This work examines the ozone electrogeneration (OE) at a binary coating of different nominal compositions (Pt) x- (TaOy) (100-x), where x (percentage in the precursor solution) varied between 1% and 100% The percent is of the electrocatalytic activity towards oxygen evolution. The oxygen evolution was retarded to a the largest retardation was obtained at the (Pt) 10- (TaOy) 90 electrode (ca. 480 m V positive shift) as compared with the (Pt) 100- (TaOy) 0 electrode.This This value is considered to be among the highest values reported for OE at 25C in neutral media. The composite electrodes were characterized by voltammetric and surface techniques (19.3%) at the former electrode A plausible explanation for the chan ge of the efficiency of OE with the electrode composition is given based on the electrochemical results.