Reactivity indexes for the electrocatalytic oxidation of hydrogen peroxide promoted by several ligand-substituted and unsubstituted Co phthalocyanines adsorbed on graphite

摘要: Abstract The electrocatalytic activity of metal phthalocyanines is controlled by their coordination chemistry and ability to bind the reacting molecules as extra-planar ligands. This nature both ligand, latter affecting electron density located on metal, which active site. In this work we have examined several Co having electron-donating or electron-withdrawing substituents ligand in order modulate center binding energy peroxide We found that species Co(II) catalytic log i at constant E varies linearly with °′, Co(II)/(I) Co(III)/(II) formal potentials catalyst. Essentially, these results indicate improve it required prepare complexes ligands more powerful substituents, shift potential complex negative values decrease metal.