metals
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Chemistry
Acid dissolution of mine waste – a new environmentally friendly way to extract metals
Credit: CC0 Public Domain New research shows that magnesium and other metals in mine waste can be solubilized and recovered thanks to acid-producing bacteria. Researcher Nathan van Wyk believes this method has great potential to reduce environmental pollution, extend the life of mines and provide raw materials for industry. Each year, more than 3 billion tons of metals are produced…
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Chemistry
Oxygen and chlorine generation without precious metals: Electrode potential changes the MXene surface
Credit: Journal of the American Chemical Society (2024). DOI: 10.1021/jacs.4c08518 MXene is a type of two-dimensional material discovered in 2011. Previous theoretical studies predicted that MXene has no catalytic activity in anodic processes. Researchers led by Professor Kai S. Exner, head of the Department of Theoretical Catalysis and Electrochemistry at the University of Duisburg-Essen (UDE), used multiscale modeling to disprove…
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Physics
Can precious metals become superconductors?
Predicted dependence of the superconducting critical temperature of ultrathin gold films as a function of film thickness. As the film thickness decreases, the temperature at which gold becomes superconducting can be measured experimentally and matches the temperature of well-known superconducting elements such as aluminum. Credit: A. Zaccone and G. Ummarino Superconductivity is a phenomenon in which current flows through metals…
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Chemistry
Schottky junction catalyst promotes hydrogen production by non-precious metals in water electrolysis
By KeAi Communications Co. The space charge region generated by the dual modulation induced a local “OH and H+ rich” environment, selectively promoting the OER and HER kinetic behaviors. Credit: Guangping Yang, Sining Yun. Electrically driven water electrolysis has attracted attention as an environmentally friendly method for hydrogen production, as high-purity hydrogen is essential to resolving the energy crisis. However,…
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