Oxygen reduction in acid media on supported iron naphthalocyanine

Facile synthesis, spectroscopy and electrochemical activity of two substituted iron phthalocyanines as oxygen reduction catalysts in an acidic environment

“…In particular, other authors have reported on the synthesis and ORR activity of FeNpPc as well as CoNpPc [6,7,[27][28][29], where FeNpPc was shown to proceed via 4 electron, and CoNpPc was shown to proceed via 2 electron, reduction mechanism. It is unusual that the tetra-tert-butyl substitution of FePc has a minimal effect on its ORR mechanism, but the same substituents on FeNpPc appear to have a significant effect on the FeNpPc(tBu) 4 ORR mechanism.…”

“…The active electrode area of 0.12 cm 2 was electrochemically determined with a 1.00 × 10 −3 M K 3 [Fe(CN) 6 ] solution. For surface attachment irreversible adsorption of the FePc species onto the WE disk surface was achieved by immersion in an approximately 1.0 × 10 −4 M solution of the FePc species for no longer than 30 s. A full description of the working electrode (WE) preparation, adsorption of the FePc species and subsequent method to calculate the respective surface concentrations ( ) has already been reported [22].…”

“…The effect of different unpyrolyzed macrocycles, or ligands, on the TM has been studied extensively by other workers [3,[5][6][7][8][9][10] as has the effect of different substitutents on each type of macrocycle [8][9][10][11][12][13][14][15][16][17]. The macrocycle, as well as different substituents on it, affect changes in the TM's electron density via inductive and mesomeric effects [9].…”

Oxygen reduction in acid media: effect of iron substitution by cobalt on heat-treated naphthalocyanine impregnations supported on preselected carbon blacks

“…10. They involve heating various amounts of DCN(1.2) powder mixed with Fe acetyl acetonate (Fe(AcAc),) in a mole ratio of 4 DCN to 1 Fe with carbon black powder in a sealed tube.…”

Effect of axial ligands on the spectroelectrochemical properties of zinc phthalocyanine films. In situ Raman and electroreflection spectra

“…Studies of iron phthalocyanine (FePc) and iron naphthalocyanine (FeNPc) monolayers adsorbed on various metal and carbon electrodes show that the type of the support partially determines the catalytic efficiency [2,3]: electron-donating groups present on the support surface enhance the catalytic activity [4]. It has been suggested, that these groups coordinate the phthalo-cyanine metal ion and via the change in the ligand field they influence the ability to bind molecular oxygen [5,6].…”