Noble metals


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(Chem.) silver, gold, and platinum; - so called from their resistance to oxidation by air and to dissolution by acids. Copper, mercury, aluminium, palladium, rhodium, iridium, and osmium are sometimes included.

See also: Noble

References in periodicals archive ?
Hence, It is of strategic importance that the transition to pgm-free catalysts is made as quickly as possible to ensure europe~s competitive position and to reduce market pressure on the use of scarce noble metals.
Her creative process includes using noble metals and gemstones to adorn others.
The Raw Materials Group database includes data on the mines of 20 metals, which are classified into three major groups: base metals (copper, zinc, tin, and lead), noble metals (gold and silver), and rare metals (antimony, chromite, cobalt, diamond, manganese, molybdenum, nickel, niobium, palladium, platinum, rhodium, tungsten, uranium, and vanadium).
Once the steel's surface is stable (the way noble metals like gold and silver are stable) it will no longer react with the environment and cannot corrode.
For several decades, noble metals including silver have been known to exert anti-inflammatory activity.
Current electrocatalytic systems for H2 generation typically incorporate noble metals such as Pt in the cathode catalysts, because their low overpotentials ([eta]) and fast kinetics of the hydrogen evolution reaction (HER).
Increase in the cost of noble metals like gold and platinum has also contributed to the preference for all ceramic FDP.
Noble metals have good catalytic activities and resistance to carbon deposition [3, 4], but the prices are very high for large scale implementations.
20), while base metal did not show any particular tendency toward a specific failure location of a mixed failure for noble metals.
Designed around the concept of the retractable hard top, the 488 Spider has a spaceframe chassis made of 11 different aluminium alloys combined with other noble metals, such as magnesium, each one used in a highly specific way.
According to the researchers, the aim of the study was to design and produce an electrode made of gold with nanoporous structure, which is doped with two noble metals of ruthenium and palladium.
Oxidation-resistant noble metals, like platinum, which are used in water splitting devices, are rare and expensive -- limiting hydrogen's potential as alternative fuel source.