Electrochemical reduction of nitrite at poly-[Ru(5-NO2-phen)2Cl] tetrapyridylporphyrin glassy carbon modified electrode

摘要: Abstract This work describes the preparation of modified electrodes with Poly-tetraruthenated porphyrin. Also, a detailed Raman and electrochemical characterization these surfaces is shown. Glassy carbon were Ni (II), Zn (II) metal free polymeric film tetrapyridylporphyrin coordinated to four [Ru(5-NO2-phen)2Cl]+ moieties. These are very stable in aqueous solutions, evaluated for reduction nitrite ion at pH = 5.9 0.1 M NaClO4. When solution contains 0.01 M nitrite, linear sweep voltammetry results, show an enhancement current from −0,3 V conducting polymers, compared bare electrode behavior. Analyses after controlled potential electrolysis experiments verify production hydrazine, hydroxylamine ammonia. Hydroxylamine was product higher among three studied catalysts. The behavior allows predicting that process takes place through reduced macrocycle ring. electrocatalytic activity electrodes, measured as turn over frequency dependent on central cavity macrocycle. Finally, containing Ni2+ used amperometric sensor toward detection. results limit detection 9.37 × 10−6 M rage concentration 1.49 × 10−5 1.24 × 10−4 M.