noble metal

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metal

 [met´'l]
any chemical element marked by luster, malleability, ductility, and conductivity of electricity and heat, and which will ionize positively in solution. adj., adj metal´lic.
alkali metal one of a group of monovalent elements including lithium, sodium, potassium, rubidium, and cesium.
metal fume fever an occupational disorder with malaria-like symptoms occurring in those engaged in welding and other metallic operations and due to the volatilized metals. It includes brassfounder's fever (brass chill, brazier's chill) and spelter's fever (zinc chill, zinc fume fever).
heavy metal one with a high specific gravity, usually defined to be above 5.0.
heavy metal poisoning poisoning with any of the heavy metals, particularly antimony, arsenic, cadmium, lead, mercury, thallium, or zinc.
noble metal a metal that is highly resistant to oxidation and corrosion.

no·ble met·al

a metal that cannot be oxidized by heat alone, nor readily dissolved by acid, for example, gold, platinum.
Synonym(s): noble element

noble metal

A metal that resists corrosion or oxidation. Examples are gold, platinum, and silver.
See also: metal

no·ble met·al

(nōbĕl metăl)
Any metallic element used in dental restorations and appliances that resists tarnish, corrosion, and oxidation during heating or in intraoral environments (e.g., gold, platinum).
References in periodicals archive ?
In the hydrogen evolution reaction, the whole game is coming up with inexpensive alternatives to platinum and the other noble metals," says Song Jin, a professor of chemistry at the University of Wisconsin-Madison.
Catalysts reviewed for formaldehyde removal as reported in the literature are mainly transition metal oxide and noble metal doped on a substrate, which was metal oxide in many cases.
According to ECD Ovonics, the work will focus on Ovonic's Metal Hydride Fuel Cell technology, which does not utilize noble metals traditionally used as catalysts for fuel cells.
Noble gases and noble metals are quite selective in the elements they form bonds to.
These noble metals, however, are not compatible with standard silicon manufacturing technologies, limiting their use in commercial products.
However, the noble metals (Ru, Os, Rh, Ir, Pd, Pt) that are currently most common in homogeneous catalysts suffer from high toxicity and environmental impact in addition to their scarcity and ensuing high cost.
Copper sulfide is also less expensive and more environment-friendly than the noble metals used in similar hybrids.
Fred Beamish was the world's number one authority on the analytical chemistry of the noble metals, having to his credit over 150 publications in this field, including three books and 20 critical review articles.
Six prominent academics and industrialists from the Ukraine and Russia have produced this highly-detailed account which covers the classification, manufacturing methods, treatment and properties of the non-ferrous metals (aluminium, titanium, magnesium, copper, nickel, cobalt, zinc, cadmium, lead, tin, bismuth, noble metals and earth metals).
Issues related to Po management will be also addressed by an ab initio theoretical approach, predicting its solubility in LBE, the interaction with noble metals to select possible getters and studying formation of Po-compounds.
They can also help the commercialization of the use of the new nanocatalysts as the substitutes for the catalysts of noble metals.