Palladium is a chemical element in the periodic table which has the symbol Pd and atomic number 46. It is a rare silver-white, shiny metal that was discovered in 1803 by William Hyde Wollaston. He named it after the asteroid Pallas, a nickname of the Greek goddess Athena, which she acquired when she killed Pallas. Palladium, platinum, rhodium, ruthenium, iridium, and osmium form a group of elements referred to as platinum group metals (PGM). They have similar chemical properties, but palladium has the highest melting point and lowest density among this group.
More than half of the supply of palladium and platinum-like compounds goes into catalytic converters, which convert up to 90% of harmful gases from motor vehicle exhaust (hydrocarbons, carbon monoxide and nitrogen dioxide) into less harmful substances (nitrogen, carbon dioxide and water vapor). ). Palladium is also used in electronics, dentistry, medicine, hydrogen purification, chemical applications, groundwater remediation and jewelry. Palladium plays a key role in the technology used for fuel cells, which combine hydrogen and oxygen to produce electricity, heat and water.
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