Catalytic Reduction of Oxygen

Jalan V, Taylor EJ. 1983. Importance of interactomic spacing in catalytic reduction of oxygen in phosphoric acid. J Electrochem Soc 130 2299-2301. 

Catalytic reduction of oxygen directly to water, while not as yet possible with traditional catalyst technology at neutral pH, is achieved with some biocatalysts, particularly by enzymes with multi-copper active sites such as the laccases, ceruloplasmins, ascorbate oxidase and bilirubin oxidases. The first report on the use of a biocatalyst... 

The biomembrane-like films can provide a favorable microenvironment for proteins and enhance direct electron-transfer rate between proteins and electrodes, so many biopolymers such as methyl cellulose (MC) and dihexadecylphospate (DHP) have been used to immobilize Mb and make biosensors [230-232], The electrochemical catalytic reduction of oxygen by the Mb-MC/EPG was examined by CVs. Mb-MC... 

Many complexes are unstable in 4.5 N H2SO4, which is used as electrolyte in the fuel cell, even at room temperature. Where tiffs was the case, measurements were carried out in potassium carbonate/potassium bicarbonate buffer solution (pH 9.3). We were thus able to determine the reactivity of a wide range of substances, in particular for the catalytic reduction of oxygen. 

A second attempt to explain the corrosion protection of polyanUine was the formulation of a mechanism with a catalytic reduction of oxygen and a simultaneous formation of a passivating metal oxide film on the substrate. Later it was shown that this mechanism is not supported by experimental investigations. ... 

To summarize, the conducting polymer by itself can serve as an oxidant, but its behavior is clearly modified by the presence of oxygen, be it by direct catalytic reduction of oxygen at the CP film surface or by oxygen maintaining the polymer in an oxidized state, as discussed in Section 15.5.5. These are important processes by which CP coatings could create and maintain passive films on active metals. 

Yamamoto, K. and D. Taneichi (1999). Electrochemical catalytic reduction of oxygen by self-doped polyanUine-Co porphyrin complex-modified glassy carbon electrode. J. Inorg. Organomet. Polymers. 9, 231-243. 

Wang, C., Daimon, H., Onodera, T, Koda, T. Sun, S. A general approach to the size- and shape-controlled synthesis of platinum nanoparticles and their catalytic reduction of oxygen. Angew. Chem. Int Ed. 47... 

The catalytic reduction of oxygen (1.24 mM) was investigated at a BDD electrode under conditions where the electron transfer is mediated by the reduction of anthraquinone monosulfonate (AQ, 50 /rM). The process is thought to be a 2H+, 2e system, where overall the oxygen is reduced to hydrogen peroxide. 

Fig. 7.16 Experimental voltammetry for the catalytic reduction of oxygen (1.24mM) at a BDD electrode mediated by anthraquinone monosulfonate (50/rM). The scan rate is 800 mVs arrows indicate scan direction.

The organic nonaqueous electrolyte-based Li-air battery has gained a significant amount of attention. The catalytic reduction of oxygen is primarily a two-electron process leading to the formation of lithium peroxide (U2O2) and lithium oxide (IJ2O) as the final products [85,93,94], as expressed below ... 

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