Publication

Use of Zr/ZrO2 as a counter electrode for the minimization of loss reactions in single-compartment electrolysis cells

Christos Comninellis
1995
Conference Papers

Abstract

The use of ZrO2 membrane on counter electrodes (e.g. Zr) is proposed for controlling the mass transfer rates to the electrode and therefore the extent of possible loss reactions. A comparative study was undertaken to examine the influence of the prepn. technique of the Zr/ZrO2 electrode on its electrochem. properties using the Ce(IV)/Ce(III) redox couple as test reaction. The obtained results showed that the rate of Ce(IV) redn. is strongly decreased on Zr/ZrO2 cathodes, prepd. by the thermal oxidn. of metallic Zr. A model is also proposed for the quasi-divided operation mode, where the counter electrode is covered with an inorg. membrane (ZrO2). Such electrochem. reactors offer an effective alternative to the traditional divided electrochem. reactor. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/9d815aca-acc2-48b7-9f07-c791d3a3d547

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Christos Comninellis
1995
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9d815aca-acc2-48b7-9f07-c791d3a3d547

About this result

Related concepts (32)

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.

Auxiliary electrode

In electrochemistry, the auxiliary electrode, often also called the counter electrode, is an electrode used in a three-electrode electrochemical cell for voltammetric analysis or other reactions in which an electric current is expected to flow. The auxiliary electrode is distinct from the reference electrode, which establishes the electrical potential against which other potentials may be measured, and the working electrode, at which the cell reaction takes place.

Electrochemistry

Electrochemistry is the branch of physical chemistry concerned with the relationship between electrical potential difference, as a measurable and quantitative phenomenon, and identifiable chemical change, with the potential difference as an outcome of a particular chemical change, or vice versa. These reactions involve electrons moving via an electronically-conducting phase (typically an external electrical circuit, but not necessarily, as in electroless plating) between electrodes separated by an ionically conducting and electronically insulating electrolyte (or ionic species in a solution).

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Use of Zr/ZrO2 as a counter electrode for the minimization of loss reactions in single-compartment electrolysis cells

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