Unexpected Enhancement of Electrocatalytic Nature of Ti/(RuO2)(x)-(Sb2O5)(y) Anodes Prepared by the Ionic Liquid-Thermal Decomposition Method

作者：Santos Tarciso E S; Silva Ronaldo S; Meneses Cristiano T; Martinez Huitle Carlos A; Eguiluz Katlin I B; Salazar Banda Giancarlo R^*

来源：Industrial & Engineering Chemistry Research, 2016, 55(11): 3182-3187.

DOI：10.1021/acs.iecr.5b04690

Titanium electrodes covered with ruthenium and antimony oxides with different compositions (Ti/(RuO2)(0.5)-(Sb2O5)(0.5) and Ti/(RuO2)(0.8)-(Sb2O5)(0.2)) were synthesized by using the ionic liquid (IL) and Pechini methods. These electrodes were characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and electrochemical techniques, showing that the electrodes prepared by the IL method (green chemistry route) presented grains, a noncracked morphology, rutile structure, and significant electroactive area. The electrocatalytic nature of both electrodes was evaluated by electrochemical degradation of a persistent organic compound (atrazine herbicide) by applying 10 and 20 mA cm 2, and compared, for the first time, with a nonactive electrode with higher oxidation power (boron-doped diamond (BDD)). Results clearly showed that electrodes obtained by the IL method achieved higher degradation efficiencies. Compared with BDD anode, the Ti/(RuO2)(0.8)-(Sb2O5)(0.2) electrode showed a similar performance to remove atrazine (98% in 100 min), evidencing oxidation power as active anode.

• 出版日期2016-3-23