来源：ACS PublicationsIn this study, Ni-Co-Al mixed oxides were synthesized via continuous-flow hydrothermal synthesis (CFHS) in supercritical water (T ≥ 445 °C, p = 24 MPa) and combined with different loadings of La-, Ce-, and Ga-based oxides. From these precursors, catalysts for the decomposition of ammonia were generated through reductive pretreatment in hydrogen. The addition of Ga leads to less active catalysts that contain (Co,Ni)-Ga phases, which are transformed into (Co,Ni)4N during NH3 decomposition. In contrast, La- and Ce-based oxides strongly enhance the catalytic activity. The b...
Release time:
2026
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09
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来源：ACS PublicationsThree rare-earth-embedded phosphotungstates with a dimeric sandwich structure containing two types of building blocks (BBs) [NH2(CH3)2]11H[RE(P2W17O61)(W5O18H)]·9H2O [RE = Dy3+ (1), Er3+ (2), Pr3+ (3)] have been synthesized via a one-pot self-assembly strategy. A distinctive feature is that the polyanion [Dy(P2W17O61)(W5O18H)]12– was composed of one monolacunary Dawson [P2W17O61]10– and one monolacunary Lindqvist [W5O18]5– segments. To the best of our knowledge, this is the first successful synthesis of a rare-earth-embedded polyoxotungstate incorporating both Dawson-ty...
Release time:
2026
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09
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来源：ACS PublicationsDiscovering sulfate optical crystals with enhanced birefringence and a broad transparency window is of great interest but remains challenging. Herein, two new rare-earth sulfate crystals NaNH4Y2(SO4)4 and NaKY2(SO4)4 were designed and successfully synthesized by introduction of rare-earth Y3+ ions into alkali metal sulfates. Transparent millimeter-sized single crystals were grown by a facile hydrothermal method, with NaNH4Y2(SO4)4 reaching dimensions up to 4 × 4 × 2 mm3. Both compounds are isostructural and built from identical structural units, namely [YO8] dodeca...
Release time:
2026
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09
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来源：ACS PublicationsRare earth elements (REEs) have been identified as “critical” metals because of their strategic applications in high-end energy devices such as wind turbine generators for enhanced energy production, permanent magnets, and electric vehicle batteries. Coal, on the other hand, is a conventional energy source and has been used for combustion-based energy production. Ash is generated as a waste product during combustion. Both combustion and ash waste are detrimental to the clean energy goal. The study demonstrates the extraction of REEs from coal ash and aims to present coal as ...
Release time:
2026
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