Unexpected Enhancement of Electrocatalytic Nature of Ti/(RuO2)x–(Sb2O5)y Anodes Prepared by the Ionic Liquid-Thermal Decomposition Method
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2016-03-14 |
| Journal | Industrial & Engineering Chemistry Research |
| Authors | Tarciso Éder Santana Santos Santana Santana Santos, R.S. Silva, C.T. Meneses, Carlos A. Martínez‐Huitle, Katlin Ivon Barrios Eguiluz |
| Institutions | Universidade Tiradentes, Universidade Federal do Rio Grande do Norte |
| Citations | 30 |
Abstract
Section titled “Abstract”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 an improvement in its oxidation power as active anode.