Zn-BTC (H3BTC refers to 1, 3, 5-benzoic acid) MOF was used as a self-template and a zinc source to prepare ZnS/NiS₂ with a layered heterogeneous structure as a promising electrode material using cation exchange and solid-phase vulcanization processes. The synergistic effect of the two metal sulfides enhances the application of ZnS/NiS₂. And the high specific surface area and abundant active sites further promote the mass/charge transfer and redox reaction kinetics. In the three-electrode system, the specific capacitance was as high as 1547 F/g at a current density of 1 A/g, along with satisfactory rate capability (1214 F/g at 6 A/g) and cycling performance. Coupled with activated carbon (AC), the prepared hybrid device (ZnS/NiS₂ as the positive electrode and AC as the negative electrode) (ZnS/NiS₂/AC) can be operated under a potential window of 1.6 V and provides a high energy density of 26.3 Wh/kg at a power density of 794 W/kg. Notably, the assembled ZnS/NiS₂//AC showed little capacity degradation after 5000 charge/discharge cycles.

We report the synthesis of RuCuRhIrPt HEA NPs with well-controlled face-centered cubic and hexagonal close-packed phases at the same composition, and demonstrate their crystal-structure-dependent electrocatalytic hydrogen production performance.

High-entropy intermetallic (HEI) nanomaterials have recently been established as a representative class of high-performance nanocatalysts. However, the synthesis of HEI nanomaterials remains a significant challenge, with only a limited number of types being reported to date. This review aims to provide a systematical overview of the current state of research on HEI nanomaterials. The synthesis strategies are first discussed, with a special emphasis on the pivotal role that supports play in the formation of HEI nanomaterials. Following this, we provide a summary of key catalytic applications and focus on the structure–performance relationships. Finally, the review concludes by discussing the challenges faced in this area and suggesting potential research directions for the future.

Triplet–triplet annihilation upconversion (TTA-UC) from the visible to ultraviolet (UV) holds promise for UV-driven photochemistry, yet the design principles governing interfacial triplet energy transfer (TET) and overall efficiency remain debated. Here, we compare two sensitization strategies for TTA-UC using ZnSe/ZnS core/shell quantum dots, including transmitter-mediated (with 4-biphenylcarboxylic acid, BCA) and transmitter-free direct assembly. Two high-triplet-energy annihilators, 2,6-di-tert-butylnaphthalene (DTBN) and p-terphenyl (TP), are investigated. Time-resolved photoluminescence reveals that while DTBN exhibits faster interfacial TET (k_TET = 0.030 ns⁻¹ vs. 0.022 ns⁻¹ for TP in direct assemblies), its low fluorescence quantum yield (4.77% vs. 54.59% for TP) severely limits UC efficiency. Consequently, the direct ZnSe/ZnS-TP assembly achieves a maximum UC efficiency of 7.9%, outperforming both its BCA-mediated counterpart (6.9%) and DTBN-based systems (≤1.5%). These findings establish that simplifying the donor–acceptor interface while prioritizing the annihilator emissivity can yield superior performance, providing a key design principle for high-efficiency visible-to-UV upconversion materials.