Addressing Discrepancies between Theory and Experiments in Boltzmann Luminescence Thermometry with Ln3+ Ions 来源：ACS PublicationsTrivalent lanthanide ion-doped nanoparticles are widely employed as nanoscale thermometers, driving rapid advancements in real-world applications. When using the Luminescence Intensity Ratio (LIR) technique, a calibration process is often required to determine macroscopic calibration parameters. However, despite extensive studies from various research groups, significant discrepancies are observed among the reported values, even for identical Ln3+–host systems un...
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2025
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来源：ACS PublicationsWe report the activity of transition metals (Fe, Co, and Ru) supported on CeO2 (CeO) and Gd-doped CeO2 (CeGdO) for ammonia synthesis. Compared with BM/CeO (BM = Fe + Co), the Ru/BM/CeGdO catalyst achieved 3.1-fold higher rates at 450 °C and 0.8 MPa. Such high activity was attributed to the basicity of the catalysts and their reversible hydrogen storage ability. Specifically, built-in oxygen vacancies and partially reduced ceria support readily transfer electrons to the metals. Further, the electron-rich metal surface easily dissociates N2 and forms NH3 at rapid rates. K...
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2025
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Structural Transformations in Nickel-Doped Lanthanum-Based Electrocatalyst for Enhanced Oxygen Evolution Reaction 来源：ACS PublicationsMetal oxides are among the most promising electrocatalysts for the oxygen evolution reaction (OER). However, metal oxides often exhibit poor conductivity and electron transfer, limiting efficient charge transfer. Tuning the population of the d-orbital near the Fermi level and inducing porosity at the electrode–electrolyte interface can alter the charge transfer kinetics. This can also be achieved via doping with a conductive metal such as nickel (Ni) as it e...
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2025
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Optimized Flux Single-Crystal Growth of the Quantum Spin Liquid Candidate NdTa7O19 and Other Rare-Earth Heptatantalates, ErTa7O19 and GdTa7O19 来源：ACS PublicationsSingle crystals are essential for characterizing a wide range of magnetic states, including exotic ones such as quantum spin liquids. This study reports a flux method for growing single crystals of NdTa7O19, the first quantum spin liquid candidate on a triangular spin-lattice with dominant Ising-like spin correlations. Purple NdTa7O19 single crystals with hexagonal morphology were successfully grown by using a K2Mo3O10–B2O3 flux....
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2025
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