Real-time measurements captured by researchers at the Department of Energy's Oak Ridge National Laboratory provide missing insight into chemical separations to recover cobalt, a critical raw material used to make batteries ...
Materials Science
Aug 04, 2020
0
148
A research team from Ruhr-Universität Bochum (RUB) and Carleton University in Ottawa has manufactured a novel, highly versatile cobalt compound. The molecules of the compound are stable, extremely compact and have a low ...
Materials Science
Jun 09, 2020
0
17
Scientists have been interested in superconductors—materials that transmit electricity without losing energy—for a long time because of their potential for advancing sustainable energy production. However, major advances ...
Superconductivity
Mar 03, 2020
0
1359
Scientists at Tokyo Institute of Technology (Tokyo Tech) demonstrate the first visible-light photoelectrochemical system for water splitting using TiO2 enhanced with an earth-abundant material—cobalt. The proposed approach ...
Materials Science
Feb 18, 2020
2
64
A team of researchers from Louisiana State University and ExxonMobil Chemical has found a way to replace the rhodium catalysts used in the hydroformylation process. In their paper published in the journal Science, the group ...
IBS scientists and their colleagues have recently report an ultimate electrocatalyst that addresses all of the issues that trouble H2O2 production. This new catalyst comprising the optimal Co-N4 molecules incorporated in ...
Materials Science
Jan 13, 2020
1
856
An Oregon State University chemistry researcher who made history a decade ago with the accidental discovery of the first new blue inorganic pigment in more than two centuries is again pushing forward the science of color.
Materials Science
Dec 16, 2019
2
252
An international team led by researchers at Princeton University has directly observed a surprising quantum effect in a high-temperature iron-containing superconductor.
Superconductivity
Nov 22, 2019
14
462
Increasingly scarce metals are being recovered from mining waste by University of Queensland researchers, who are making the most of native plants' metal-absorbing nature.
Biotechnology
Jul 16, 2019
0
12
Coal ash solids found in sediments collected from Sutton Lake in 2015 and 2018 suggest the eastern North Carolina lake has been contaminated by multiple coal ash spills, most of them apparently unmonitored and unreported ...
Environment
Jun 03, 2019
0
103
Cobalt ( /ˈkoʊbɒlt/ or /ˈkoʊbɔːlt/) is a chemical element with symbol Co and atomic number 27. It is found naturally only in chemically combined form. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.
Cobalt-based blue pigments have been used since ancient times for jewelry and paints, and to impart a distinctive blue tint to glass, but the color was later thought by alchemists to be due to the known metal bismuth. Miners had long used the name kobold ore (German for goblin ore) for some of the blue-pigment producing minerals; they were named because they were poor in known metals and gave poisonous arsenic-containing fumes upon smelting. In 1735, such ores were found to be reducible to a new metal (the first discovered since ancient times), and this was ultimately named for the kobold.
Nowadays, some cobalt is produced specifically from various metallic-lustered ores, for example cobaltite (CoAsS), but the main source of the element is as a by-product of copper and nickel mining. The copper belt in the Democratic Republic of the Congo and Zambia yields most of the cobalt metal mined worldwide.
Cobalt is used in the preparation of magnetic, wear-resistant and high-strength alloys. Cobalt silicate and cobalt(II) aluminate (CoAl2O4, cobalt blue) give a distinctive deep blue color to glass, smalt, ceramics, inks, paints and varnishes. Cobalt occurs naturally as only one stable isotope, cobalt-59. Cobalt-60 is a commercially important radioisotope, used as a radioactive tracer and in the production of gamma rays.
Cobalt is the active center of coenzymes called cobalamin or vitamin B12, and is an essential trace element for all animals. Cobalt is also an active nutrient for bacteria, algae and fungi.
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