Stepped-up production of environmentally friendly catalytic converters has been pushing up demand for the metal, leading to concerns about a supply shortage. Does all of this rhodium talk have you revved up about precious metals? Check out our top recommendations for tracking gold , silver, and other precious metals prices so you can stay informed. What Is Rhodium? What Is Rhodium Used for? Electron Shell Configuration :. Rhodium Previous Isotopes Next. History and Uses : Rhodium was discovered by William Hyde Wollaston, an English chemist, in shortly after his discovery of the element palladium.
Citation and linking information For questions about this page, please contact Steve Gagnon. According to Impala Platinum, global production of rhodium is limited to only about 1 million troy ounces annually or roughly 28 metric tons annually, whereas, in comparison, metric tons of palladium were produced in About one-quarter of rhodium production comes from secondary sources, mainly recycled catalytic converters, while the remainder is extracted from ore.
According to the US Geological Survey, autocatalysts accounted for 77 percent of all rhodium demand in Three-way catalytic converters for gasoline engines use rhodium to catalyze the reduction of nitrogen oxide to nitrogen.
Roughly 5 percent to 7 percent of global rhodium consumption is used by the chemical sector. Rhodium and platinum-rhodium catalysts are used in the production of oxo-alcohol manufacturing as well as to produce nitric oxide, a raw material for fertilizers, explosives, and nitric acid. Glass production accounts for a further 3 percent to 6 percent of rhodium consumption each year.
Because of their high melting points, strength and resistance to corrosion, rhodium, and platinum can be alloyed to form vessels that hold and shape molten glass. Also of importance is that alloys containing rhodium do not react with, or oxidize, the glass at high temperatures. Other rhodium uses in glass production include:. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. Create a personalised content profile. It is also classified as a noble metal, meaning that it does not react to oxygen easily, acts as a fantastic catalyst and is resistant to corrosion and oxidation.
Some common characteristics of the platinum group metals include high melting points, general non-toxicity, and resistance to wear, oxidation and corrosion, according to Chemistry Libretexts. Rhodium is the rarest of the platinum group, only occurring up to one part per million in the Earth's crust, according to Chemistry Libretexts.
Rhodium has lower density and a higher melting point than platinum. Rhodium it is unaffected by air and water up to 1, degrees Fahrenheit degrees Celsius , according to Lenntech. Rhodium was discovered in by English chemist William Hyde Wollaston shortly after he had discovered the element palladium. Wollaston extracted rhodium from a piece of platinum ore that he had obtained from South America. Rhodium often occurs with deposits of platinum and is commonly obtained from the mining and refining of platinum.
Wollaston was first alerted to the possibility of a new element existing in platinum ore by the French chemist Hippolyte-Victor Collet-Descotils, who believed that the red color of some platinum salts was due to the presence of an unidentified metal.
After a series of chemical reactions, Wollaston was able to remove the platinum and palladium from the sample of platinum ore.
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