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...
Release time:
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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Crystal Growth of Quaternary Rare Earth Selenosilicates by Using the Flux-Assisted Boron Chalcogen Mixture Method: Investigation of Their Magnetic and Optical Properties来源：ACS PublicationsA series of rare earth magnesium selenosilicates, RE3Mg0.5SiSe7 (RE = Ce, Pr, Nd, Sm, Gd, Tb, Dy) were obtained as single crystal using the flux assisted boron chalcogen mixture (BCM) method. The structures of the crystals were determined by single-crystal X-ray diffraction. The RE3Mg0.5SiSe7 series crystallizes in the hexagonal crystal system in the space group P63. Polycrystalline powders were synthesized t...
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2025
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