iron
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Chemistry
Study of iron catalysts provides insight into ammonia decomposition
Credit: ACS Catalysis (2024). DOI: 10.1021/acscatal.4c04415 The use of ammonia is considered a promising method to transport hydrogen. But we also need an efficient process to convert it back into hydrogen and nitrogen. An international research team has gained new insights into the mode of operation of iron catalysts that can be used to split ammonia into nitrogen and hydrogen.…
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Environment
Limestone and iron reveal Western Australia’s mysterious extreme rains 100,000 years ago
The Conversation by Milo Barham, Andrei Schmutz, John Alan Webb, Kenneth McNamara, Martin Danisik, and Matej Riper Credit: CC0 Public Domain Almost one-sixth of the Earth’s surface is covered in otherworldly landscapes with an unfamiliar name: karst. These landscapes are like natural sculpture parks, with dramatic formations dotted with caves and rock towers slowly carved by water over thousands of…
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Chemistry
Affordable iron catalysts offer sustainable route to valuable Z-alkenes
This schematic illustrates the development of an iron-catalyzed dialkylation reaction that selectively converts arenes to the thermodynamically unfavorable Z isomer of trisubstituted alkenes. The reaction proceeds through transition states TS 1 and TS 2, each involving a different carbon-carbon bond formation chemical process. The high regioselectivity and Z-selectivity of this method make it a valuable tool for organic synthesis. Credit:…
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Earth
Study identifies superionic iron hydride as key to ultra-low velocity zone at the boundary between Earth’s core and mantle
Mean square displacements (MSD) of Fe and H atoms in fcc-FeH at different temperatures and volumes from NVT-FPMD simulations. The core-mantle boundary (CMB) is a key boundary within the Earth, marking the boundary between the outer core and the lower mantle. Over the past two decades, seismological studies have identified anomalously low-velocity regions above the CMB, such as the Large-Scale…
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