Cathodic hydrogen production by simultaneous oxidation of methyl red and 2,4-dichlorophenoxyacetate aqueous solutions using Pb/PbO<sub>2</sub>, Ti/Sb-doped SnO<sub>2</sub>and Si/BDD anodes. Part 1: electrochemical oxidation
José Eudes L. Santos, Djalma Ribeiro da Silva, Carlos A. Martínez‐Huitle, Elisama Vieira dos Santos, Marco A. Quiróz
Abstract
-phenylenediamine, in the fixed electrolysis time. The behavior observed during the elimination of 2,4-DNa is due to its difficulty in degrading the chlorine groups in its aromatic ring which makes 2,4-DNa a more stable molecule. In the first oxidation stage, 2,4-dichlorophenol (2,4-DP) is produced in all cases, but on Si/BDD, this intermediate is quickly consumed. From the polarization curves and Tafel analysis, a reaction scheme for the formation and consumption of 2,4-DP was proposed.
Topics & Concepts
Aqueous solutionAnodeCathodic protectionDopingAnodic oxidationHydrogenInorganic chemistryMaterials scienceHydrogen productionImpurityChemistryElectrodePhysical chemistryOrganic chemistryOptoelectronicsElectrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceAdvanced oxidation water treatment