Publication

Characterization of DSA-type oxygen evolving electrodes: choice of a coating

Christos Comninellis
1991
Journal Articles

Abstract

In the search for a DSA-type electrode for oxygen evolution in acidic solns., nine binary coatings with IrO2, RuO2, Pt as conducting component, and TiO2, ZrO2, Ta2O5 as inert oxides, were deposited on titanium, examd. for their microstructural properties and tested for their electrocatalytic activity and anodic stability. Electrochem. "true" surfaces of the coatings were found to be dependent on structure and morphol.: the mixts. that form a solid soln. (RuO2-TiO2), or allow limited miscibility (IrO2-TiO2), show the lowest dispersion of active material. Differences in service lives, are attributed to differences in wear mechanisms of the electrodes. Ti/IrO2 (70 mol%)-Ta2O5 (30 mol%) is by far the best electrode. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/bd9e1367-72d2-4b35-992a-14121977d2ab

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Christos Comninellis
1991
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/bd9e1367-72d2-4b35-992a-14121977d2ab

About this result

Related concepts (27)

Rutile

Rutile is an oxide mineral composed of titanium dioxide (TiO2), the most common natural form of TiO2. Rarer polymorphs of TiO2 are known, including anatase, akaogiite, and brookite. Rutile has one of the highest refractive indices at visible wavelengths of any known crystal and also exhibits a particularly large birefringence and high dispersion. Owing to these properties, it is useful for the manufacture of certain optical elements, especially polarization optics, for longer visible and infrared wavelengths up to about 4.

Electrode

An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte, a vacuum or air). Electrodes are essential parts of batteries that can consist of a variety of materials depending on the type of battery. The electrophore, invented by Johan Wilcke, was an early version of an electrode used to study static electricity. Electrodes are an essential part of any battery. The first electrochemical battery made was devised by Alessandro Volta and was aptly named the Voltaic cell.

Reference electrode

A reference electrode is an electrode that has a stable and well-known electrode potential. The overall chemical reaction taking place in a cell is made up of two independent half-reactions, which describe chemical changes at the two electrodes. To focus on the reaction at the working electrode, the reference electrode is standardized with constant (buffered or saturated) concentrations of each participant of the redox reaction. There are many ways reference electrodes are used.

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Characterization of DSA-type oxygen evolving electrodes: choice of a coating

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