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%, coate...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, The OE is performed in an artificial tap water at room temperature （25 ℃）. The percentages of Pt and Tatu in the coating significantly affect the electro- catalytic 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 mV positive shift） as compared with the （Pt）100-（TaOy）0 electrode. This was reflected in a high current efficiency （CE） of OE （ca. 19.3%） at the former electrode. This value is considered to be among the highest values reported for OE at 25℃ in neutral media. The composite electrodes were characterized by voltammetric and surface techniques. A plausible explanation for the change of the efficiency of OE with the electrode composition is given based on the electrochemical results.展开更多
文摘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, The OE is performed in an artificial tap water at room temperature （25 ℃）. The percentages of Pt and Tatu in the coating significantly affect the electro- catalytic 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 mV positive shift） as compared with the （Pt）100-（TaOy）0 electrode. This was reflected in a high current efficiency （CE） of OE （ca. 19.3%） at the former electrode. This value is considered to be among the highest values reported for OE at 25℃ in neutral media. The composite electrodes were characterized by voltammetric and surface techniques. A plausible explanation for the change of the efficiency of OE with the electrode composition is given based on the electrochemical results.
