Characterization of PVC-Tetraruthenated Metalloporphyrins Modified Electrodes: Application as Electrocatalyst in the Nitrite Reduction

摘要: Summary: This paper describes the electrochemical reduction of nitrite ion in 0.1MNaClO 4 , on glassy carbon or ITO electrodes modified with mixtures PVC- tetraruthe-nated metalloporphyrins. electrode is able to keep extraordinary electro-catalytic properties macrocycle allowing multielectronic transfers and a greatstability as consequence inclusion macrocycles into polymericsupport such PVC. On other hand, ionon these studied by cyclic voltammetry shows an enhancementin current values lower overpotential compared activity bareglassy electrode. Controlled potential electrolysis experiments verify theproduction ammonia, hydrazine hydroxylamine, showing electrocatalyticcharacter stability this Keywords: electrocatalysis; electrodes; nitrite; PVC; tetraruthenated porphyrins Introduction Nitrite ions are produced photolysis ofnitrate photodegradation ofaquatic humic substances present theaquatic environment. keyspecies global nitrogen cycle. Nitritesshow environmental biological impor-tance. Moreover, they have importantrole additive alimentary industryas preservative, antimicrobial colorfixative agent.