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 ?
Alloying platinum with noble metals such as cobalt reduces the overall cost, but such alloyed catalysts vary in performance based on their atomic structure and processing history.
And although the water supply is essentially limitless, a major roadblock to a future "hydrogen economy" is the need for platinum or other expensive noble metals in the water-splitting devices.
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.
The DAISYCUTTER pendant replaces noble metals and precious gems with cutting edge technology and state of the art industrial design, meticulously blending compound, aerodynamic curvatures that challenge the perception of value in our modern society.
But for quantum clusters and quantum dots of noble metals the mode of detection is different.
The doped noble metals include Pt, Pd, Ru, Ce, Au, Ag, Cu, and Mn.
7) To date, studies have focused largely on the separation of the noble metals, mercury, and cadmium.
There are no noble metals involved, so it should be very cheap," he said.
Current fuels cells operate at a red-hot 800+ degrees Celsius, which requires the use of expensive noble metals.
Current fuels cells operate at 800+ degrees Celsius, which require the use of expensive noble metals.
Thieves are often after the small amounts of platinum, palladium and other noble metals used in their construction.