Coordination of Fe3+ by “alizarin complexone” adsorbed on graphite electrodes to produce electrocatalysts for the reduction of O2 and H2O2

Electrocatalytic Reduction of Dioxygen on a Glassy Carbon Electrode Modified with Adsorbed Cobaloxime Complex

“…Similar results have also been reported in the literature. [10][11][12]24 The Levich plot in Fig. 8B is very close to the calculated line for a two-electron process (n = 2).…”

“…Cobalt porphyrins, 8,9 some complexes of Cu 2+ , 10,11 and Fe 3+ 12 with chelating ligands, macrocyclic Co 2+ complexes 7,13,14 and vanadium-salen complexes 15 have been applied by Anson in electrocatalysis of dioxygen reduction. The Pt, GC and OPG modified with vitamin B 12 , 16 iron porphyrins 17 and metal phthalocyanines 18 and Co 2+ -Schiff base complexes 19 have been applied for electrocatalysis of O2 reduction. The electrodes modified with napthoquinone and anthraquinone derivatives have been applied for O2 reduction.…”

Electrochemical reduction of dioxygen on carbon nanotubes–dihexadecyl phosphate film electrode

“…Direct four-electron reduction appears to be predominant on noble-metal catalysts (Pt, Pd, Ag), metal oxides and some transition-metalmacrocyclics [24]. In some recent studies of dioxygen reduction a variety of compounds have been used as electrocatalysts to modify the electrode surface, including cobalt porphyrins [25,26], some complexes of Cu 2+ and Fe 3+ [27,28], vitamin B [29,30], Nafion-methylviologen [6], anthraquinone derivatives [31], catalase [32] and so on. For example, Ohsaka and co-worker [10] proposed a twostep four-electron reduction pathway of dioxygen at the gold nanoparticles modified gold electrode:…”

Electrocatalytic oxidation of hydrazine with alizarin red S as a homogenous mediator on the glassy carbon electrode

“…Sodium 1,2-dihydroxyanthraquinone-3-sulfonic acid (alizarin red S) (ARS), is well-known as a complexation agent for the photometric [21] and electrochemical [22,23] determination of small quantities of metal ions. It acts both as an electro-active [22][23][24][25] and a surface-active compound [22,25,26] and can be reversibly reduced to anthrahydroquinone [26].…”