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A facile solid-state approach is employed to synthesize a novel magnetoplumbite-type oxide of NdMgAl 11 O 19 , which integrates spinel-stacking layers (MgAl 2 O 4 ) with Nd-O 6 mirror plane structures. The resulting NdMgAl 11 O 19 exhibits remarkable catalytic activity and conversion efficiency during the sulfur reduction reaction (SRR) in lithium-sulfur batteries. By employing the 2D projection mapping technique of in situ confocal Raman spectroscopy and electrochemical technique, it is discovered that the exposed mirror plane structure of Nd-O 6 can effectively suppress the undesiring disproportionation reaction (S 8 2- →S 6 2- +1/4 S 8 ) of long-chain lithium polysulfides at the initial stages of sulfur reduction, thereby promoting the positive process of sulfur to lithium sulfide. This not only mitigates the issue of sulfur shuttle loss but also significantly improve the kinetics of the conversion process. Leveraging these advantages, the NdMgAl 11 O 19 /S cathode delivered an impressive initial capacity of up to 1398 mAh g -1 at an electrolyte/sulfur (E/S) ratio of 5.1 µL mg -1 and a sulfur loading of 2.3 mg cm -2 . Even when the sulfur loading is increased to 10.02 mg cm -2 , the cathode retained a reversible areal capacity of 10.01 mAh cm -2 after 200 cycles. This mirror engineering strategy provides valuable and universal insights into enhancing the efficiency of cathodes in Li-S battery., (© 2024 Wiley‐VCH GmbH.)

The five-membered heterocycle 1,3,5-trimethyl-1 H -pyrazole, C 6 H 10 N 2 ( 1 ) crystallizes in space group Pnma with all non-hydrogen atoms of the mol-ecule on the crystallographic mirror plane. This arrangement has been recognized as favorable with respect to space filling by Kitaigorodskii and Wilson, pioneers in the field of crystal packing; Pnma represents a particularly rare space group for residues exclusively in a general position. Neighboring mol-ecules in 1 inter-act via non-classical C-H⋯N bonds in the plane and C-H⋯π contacts between adjacent layers. In Pnma , crystallographic inversion relates dipolar mol-ecules located on successive mirror planes and results in their head-to-tail arrangement. The inter-layer distance in the [010] direction is closely related to the van der Waals radii of C and N., (© Terwingen and Englert 2022.)