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Separation of Xe and Kr is one of the greatest challenges in the gas industries owing to their close molecular structure and similar properties. Energy‐effective adsorption‐based separation using chemically stable carbon adsorbents is a promising technology. We propose a strategy for Xe/Kr separation using MOF‐derived metallic carbon adsorbents. M‐Gallate (M=Ni, Co) were used as precursors to fabricate CoNi alloy nanoparticles embedded carbon adsorbents by one‐step auto‐reduction pyrolysis. The optimal NiCo@C‐700 exhibits record‐high IAST selectivity (24.1) and Henry's selectivity (20.1) of Xe/Kr among reported carbon adsorbents. DFT calculations, local density of states calculation, charge density difference, and Bader charge analysis reveal the great affinity with Xe benefits from the presence of Ni or CoNi nanoparticles as a result of more charge transfer from Xe than Kr to metal, thus providing higher binding energy. Breakthrough experiments further verify NiCo@C‐700 a promising candidate for Xe/Kr separation. [ABSTRACT FROM AUTHOR]

C4 olefin separations present one of the great challenges in hydrocarbon purifications owing to their similar structures, thus a single separation mechanism often met with limited success. Herein we report a series of anion-pillared interpenetrated copper coordination for which the cavity and functional site disposition can be varied in 0.2 Å scale increments by altering the anion pillars and organic linkers (GeFSIX-2-Cu-i (ZU-32), NbFSIX-2-Cu-i (ZU-52), GeFSIX-14-Cu-i (ZU-33)), which enable selective recognition of different C4 olefins. In these materials the rotation of the organic linkers is controlled to create a contracted flexible pore window that enables the size-exclusion of specific C4 olefins, while still adsorbing significant amounts of 1,3-butadiene (C4H6) or 1-butene (n-C4H8). Combining the molecular recognition and size-sieving effect, these materials unexpectedly realized the sieving of C4H6/n-C4H8, C4H6/iso-C4H8, and n-C4H8/iso-C4H8 with high capacity. [ABSTRACT FROM AUTHOR]

Li‐SO2 batteries have a high energy density but bear serious safety problems that are associated with pressurized SO2 and flammable solvents in the system. Herein, a novel ambient Li‐SO2 battery was developed through the introduction of ionic liquid (IL) electrolytes with tailored basicities to solvate SO2 by reversible chemical absorption. By tuning the interactions of ILs with SO2, a high energy density and good discharge performance with operating voltages above 2.8 V were obtained. This strategy based on reversible chemical absorption of SO2 in IL electrolytes enables the development of the next generation of ambient Li‐SO2 batteries. [ABSTRACT FROM AUTHOR]

In den Kanälen erzeugen die elektronenreichen Anionen in Kombination mit den elektronenarmen Purinringen ein mikroelektrisches Feld, das Xe-Atome polarisiert und einschließt, wodurch eine hocheffiziente Xe/Kr-Trennung unter Umgebungsbedingungen erreicht wird. Keywords: Adsorption; Gas Separation; Hydrogen-Bonded Frameworks; Krypton; Xenon EN Adsorption Gas Separation Hydrogen-Bonded Frameworks Krypton Xenon 1 1 1 03/03/22 20220307 NES 220307 Wasserstoffgebundene Gerüste, die durch Selbstorganisation von Metall-Nukleobase-Komplexen und Hexafluoranionen entstehen, werden im Forschungsartikel von Wei Zhou, Zongbi Bao et al. vorgestellt (e202117609). In den Kanälen erzeugen die elektronenreichen Anionen in Kombination mit den elektronenarmen Purinringen ein mikroelektrisches Feld, das Xe-Atome polarisiert und einschließt, wodurch eine hocheffiziente Xe/Kr-Trennung unter Umgebungsbedingungen erreicht wird. [Extracted from the article]