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Realizing an efficient turnover frequency in the acidic oxygen evolution reaction by modifying the reaction configuration is crucial in designing high-performance single-atom catalysts. Here, we report a "single atom-double site" concept, which involves an activatable inert manganese atom redox chemistry in a single-atom Ru-Mn dual-site platform with tunnel Ni ions as the trigger. In contrast to conventional single-atom catalysts, the proposed configuration allows direct intramolecular oxygen coupling driven by the Ni ions intercalation effect, bypassing the secondary deprotonation step instead of the kinetically sluggish adsorbate evolution mechanism. The strong bonding of Ni ions activates the inert manganese terminal groups and inhibits the cross-site disproportionation process inherent in the Mn scaffolding, which is crucial to ensure the dual-site platform. As a result, the single-atom Ru-Ni-Mn octahedral molecular sieves catalyst delivers a low overpotential, adequate mass activity and good stability.
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http://dx.doi.org/10.1038/s41467-024-52410-6 | DOI Listing |
J Colloid Interface Sci
August 2025
School of Chemistry, Dalian University of Technology, Dalian 116024, PR China; College of Environment and Chemical Engineering, Dalian University, Dalian 116622, China. Electronic address:
Aqueous batteries have become a prospective future energy storage system because of their low coefficient of cost and stability. However, their lower energy density limits their applications. Ammonium ions (NH) have a small hydration radius and light molar mass, and aqueous ammonium ion batteries (AAIBs) are anticipated for solving the inherent low-energy density problem of aqueous batteries.
View Article and Find Full Text PDFJ Mol Model
September 2025
Department of Electronics and Communication Engineering, National Institute of Technology Patna, Patna, Bihar, India.
Context: This study investigates the radiation tolerance of a SiGe source vertical tunnel field effect transistor (VTFET) under heavy ion-induced single event effects (SEEs). Single event effects (SEEs) occur when high-energy particles interact with semiconductor devices, leading to unintended behavior. The effect of high energy ions on the VTFET is examined for various linear energy transfer (LET) values and at multiple ion hit locations.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
September 2025
State Key Laboratory of High Pressure and Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China.
Solid-state lithium-ion batteries have raised considerable attention due to their great potential for the development of new energy storage devices with high energy density and safety. However, enhancing ion conductivity in solid-state electrolytes stands as a pivotal challenge for the large-scale commercialization of next-generation lithium-ion batteries. Here, a high-pressure strategy is reported to achieve the significant enhancement of lithium-ion conductivity by 2 orders of magnitude and the disappearance of grain boundary resistance in polyoxometalate LiPWO electrolyte via an irreversible phase transition from Keggin to bronze structure.
View Article and Find Full Text PDFSci Adv
September 2025
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
The charge density wave (CDW), a charge ordering phase, offers a valuable framework for exploring electron-electron interactions, electron-phonon coupling, and quantum phase transitions. In CDW materials, carrier density substantially influences the ground state, typically altered through foreign ion doping and investigated at macro- or mesoscopic scales via photoemission or transport techniques. However, atomic-scale visualization, particularly in doped CDW systems without foreign ions, remains rare.
View Article and Find Full Text PDFDalton Trans
September 2025
School of Chemistry, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK.
Distortions in the local symmetry around Ln(III) ions in SMMs significantly impacts slow magnetic relaxation by introducing transverse crystal field parameters that enhance quantum tunnelling of the magnetisation (QTM). Minimising these distortions, often using macrocyclic or sterically hindered ligands, or by tuning intermolecular interactions, is essential for suppressing QTM. A less-explored strategy involves aligning the molecular symmetry elements within the crystal lattice to generate a high-symmetry crystal lattice with symmetry enforced bond angles and lengths.
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