IrO2-Ta2O5|Ti electrodes prepared by electrodeposition from different Ir:Ta ratios for the degradation of polycyclic aromatic hydrocarbons

Abstract

IrO 2-Ta 2 O 5 |Ti electrodes prepared by electrodeposition from different Ir:Ta ratios for the degradation of polycyclic aromatic hydrocarbons,

Study on Electrochemical Degradation of Nicosulfuron by IrO2-Based DSA Electrodes: Performance, Kinetics, and Degradation Mechanism

“…The three kinds of IrO 2 -based electrodes all showed “cracked” structures, which was a typical feature of oxide electrodes formed during heat-expansion and cold-contraction processes. The formation of the crack was due to the different coefficients of thermal expansion between the Ti substrate and oxide coatings [37,38]. The cracks connected with each other as networks.…”

Electro‐oxidation of amoxicillin using titanium electrodes electrophoretically coated by iridium or ruthenium with tantalum oxides

“…As shown in Table 2, the naked Ti surface showed only 53.16% of COD removal, while IrTa 70:30 and RuTa 30:70 surfaces showed the highest removal, with 81.13% and 78.34%, respectively, although the AMX degradation calculated by HPLC‐UV–Vis was 99.23% and 95.14%. It is important to indicate that IrTa and RuTa surfaces have not shown leaching as reported before, 12,14 due to their mechanical stability.…”

“…Still, this research is an initial step regarding electrophoretically modified surface electrodes and further research with the corresponding optimization will be performed before commercialization. As we reported before in the reference: 12 ‘many researchers have studied the service accelerated lifetime of IrO 2 ‐Ta 2 O 5 |Ti anodes under galvanostatic conditions in 1 mol L –1 H 2 SO 4 over the potential region corresponding to the oxygen evolution reaction (OER). Huang, et al .…”

“…All electrodes were obtained by electrodeposition at a constant current density of 20 mA cm −2 for 20 min, applying a constant stirring rate. After electrophoretic deposition, the formation of metal oxides was promoted by a two‐step thermal decomposition: first, 523 K for 10 min, and then, 723 K for 1 h 12,14 …”

“…Indirect detection of surface‐generated • OH radicals was performed by UV–Vis spectrophotometry using a PerkinElmer Lambda XLS equipment, where the reaction of 1 mol of coumarin with 1 mol of • OH radical produces 1 mol of 7‐hydroxycoumarin in 0.5 mol L –1 H 2 SO 4 and is measured at a wavelength of 277 nm, as reported in the literature 12,14 . To assess the behavior of the modified surfaces in terms of • OH generation at neutral pH, the same procedure was followed, but using 0.1 mol L –1 Na 2 SO 4 as a supporting electrolyte.…”