Oxygen and hydrogen peroxide reduction catalyses in neutral aqueous media using copper ion loaded glassy carbon electrode electrolyzed in ammonium carbamate solution

A study on oxygen reduction inhibition at pyridine‐terminated self assembled monolayer modified Au(111) electrodes

“…The electrochemical oxygen reduction reaction (ORR) plays a central role in practical applications such as fuel cells and metal‐air batteries. The reduction pathway and kinetics of this reaction were studied extensively on catalytic materials e.g ., Pt, Au, and carbon electrodes 33, 34. Besides applications for energy production, electroreduction of oxygen is a reaction of great importance in corrosion science, as it induces delamination of protective organic coatings from the metal surfaces 35–37.…”

Ternary Heterostructured Nanoparticle Tubes: A Dual Catalyst and Its Synergistic Enhancement Effects for O2/H2O2 Reduction

“…Fig-ure 2 a shows the cyclic voltammogram (CV) curves. Undoubtedly, the presence of Cu II species can improve the catalytic properties toward ORR, but whether this enhancement is due to Cu 2+ mediators, [11] or arises from adsorption sites to increase the concentration of O 2 over the cathode [12] is still controversial. The redox waves of PdAuCu and PdCu appears at À0.12 and À0.21 V assigned to the reduction reaction of Cu 2+ to Cu + and Cu + to Cu, [11] which indicates that the introduction of Au can lower the oxidation potential of Cu and favor the formation of active Cu II species through the potential difference of Au/Cu system.…”

“…For the PdAuCu, PdCu, PdAu, and Pt/ C catalysts, the low metal loading of Pd or Pt was 10.2 mg cm À2 . The improved activity of the PdAuCu catalyst for ORR might be due to the change of electronic structure and local reactivity of the surface in complex and mixed particle interfaces, [13] the presence of Cu II species formed at lower potential [11,12] (see Figure S5 in the Supporting Information), and oxygen incorporation at the metal/oxide interface. reaches 4.75 mA cm À2 , nearly three times than that of PdCu (1.75 mA cm À2 ), indicating the accelerated ORR kinetics caused by Au.…”

Voltammetric Detection of Oxalic Acid by Using Glassy Carbon Electrodes with Covalently Attached Nitrogen-containing Functional Groups

“…12,13 It has recently been found that the reduction potential of oxygen can be significantly moved the positive direction by using a carbon alloy with nitrogen 14 and nitrogen-containing graphite. 15 In particular, it has been revealed by us that nitrogen-containing functional groups, such as an amino group, can easily be introduced to the surfaces of a glassy carbon (GC) electrode by the electrode oxidation of ammonium carbamate. 16 We named this electrooxidized GC electrode as an aminated GC electrode.…”