Mixed metal oxide electrode
- Mixed metal oxide electrode
-
Mixed metal oxide (MMO) electrodes are devices with useful properties for chemical electrolysis. The term refers to electrodes in which the surface contains two kinds of metal oxides. One kind, usually RuO2, IrO2, or PtO0.12, conducts electricity and catalyzes the desired reaction such as production of chlorine gas. The other metal oxide is typically titanium dioxide which does not conduct or catalyze the reaction, but is cheaper and prevents corrosion of the interior. The interior of the electrode is typically made of titanium. The amount of precious metal (that is, other than the titanium) can be around 10 to 12 grams per square metre.[1]
Applications include electrolytic cells for producing free chlorine from saltwater in swimming pools, and anodes for cathodic protection of buried or submerged structures.
Reference
- ^ "Reverse electrodialysis: Evaluation of suitable electrode systems", Chapter 4 of the doctoral thesis of Joost Veerman, 2009, p. 70.
Categories:
- Inorganic compound stubs
- Oxides
- Electrodes
Wikimedia Foundation.
2010.
Look at other dictionaries:
Mixed metal oxide — (MMO) electrodes are devices with useful properties for chemical electrolysis. The term refers to a mixture of platinum group metals used to form the surface of the electrode, which provides efficient electrolytic action while resisting corrosion … Wikipedia
Metal ions in aqueous solution — A metal ion in aqueous solution is a cation, dissolved in water, of chemical formula [M(H2O)n]z+. The solvation number, n, determined by a variety of experimental methods is 4 for Li+ and Be2+ and 6 for elements in rows 3 and 4 of the periodic… … Wikipedia
Gas metal arc welding — RMD redirects here. RMD may also refer to IRA Required Minimum Distributions. Gas metal arc welding … Wikipedia
Platinum — This article is about the chemical element. For other uses, see Platinum (disambiguation). iridium ← platinum → gold Pd ↑ Pt ↓ Ds … Wikipedia
Solid oxide fuel cell — A solid oxide fuel cell (SOFC) is an electrochemical conversion device that produces electricity directly from oxidizing a fuel. Fuel cells are characterized by their electrolyte material and, as the name implies, the SOFC has a solid oxide, or… … Wikipedia
Nitric oxide — Not to be confused with nitrous oxide or nitrogen oxides. For other uses, see NO (disambiguation). Nitric oxide … Wikipedia
Corrosion — v · d · e Materials failure modes Buckling · … Wikipedia
chemistry — /kem euh stree/, n., pl. chemistries. 1. the science that deals with the composition and properties of substances and various elementary forms of matter. Cf. element (def. 2). 2. chemical properties, reactions, phenomena, etc.: the chemistry of… … Universalium
Ruthenium — (pronEng|ruːˈθiːniəm) is a chemical element that has the symbol Ru and atomic number 44. A rare transition metal of the platinum group of the periodic table, ruthenium is found associated with platinum ores and used as a catalyst in some platinum … Wikipedia
Cathodic protection — (CP) is a technique to control the corrosion of a metal surface by making it work as a cathode of an electrochemical cell. This is achieved by placing in contact with the metal to be protected another more easily corroded metal to act as the… … Wikipedia
