MoSe 2 as a typical transition metal dichalcogenide holds great potential for energy storage and catalysis but its performance is largely limited by its poor conductivity. Bi 2 Se 3 nanosheets, a kind of topological insulators, possess gapless edges on boundary and show metallic character on surface. According to the principle of complementary, a novel integrated quasiplane structure of MoSe 2 /Bi 2 Se 3 hybrids is designed with artistic heteronanostructures via a hot injection in colloidal system. Interestingly, the heteronanostructures are typically constituted by single-layer Bi 2 Se 3 hexagonal nanoplates evenly enclosed by small ultrathin hierarchical MoSe 2 nanosheets on the whole surfaces. X-ray photoelectron spectroscopy investigations suggest obvious electron transfer from Bi 2 Se 3 to MoSe 2 , which can help to enhance the conductivity of the hybrid electrode. Especially, schematic energy band diagrams derived from ultraviolet photoelectron spectroscopy studies indicate that Bi 2 Se 3 has higher E F and smaller Φ than MoSe 2 , further confirming the electronic modulation between Bi 2 Se 3 and MoSe 2 , where Bi 2 Se 3 serves as an excellent substrate to provide electrons and acts as channels for high-rate transition. The MoSe 2 / Bi 2 Se 3 hybrids demonstrating a low onset potential, small Tafel slope, high current density, and long-term stability suggest excellent hydrogen evolution reaction activity, whereas a high specific capacitance, satisfactory rate capability, and rapid ions diffusion indicate enhanced supercapacitor performance.

The recently built electron-energy-loss spectrometer (EELS) (typical FWHM 60 meV) was employed to measure the EELS spectra of argon in the discrete and autoionization resonance regions at a 2.5-keV impact energy and a mean scattering angle of O'. Relative differential optical oscillator strength spectra were established by multiplying the EELS spectra by the known Bethe-Born conversion factor of the spectrometer, and were normalized at a single point in the smooth continuum using the absolute values reported by Chan et al. [Phys. Rev. A 46, 149 (1992)]. The absolute oscillator strengths corresponding to these energy regions are reported and compared with previously published experimental and theoretical values. The values of parameters q, p, E", and I for autoionization resonances involving states 3s3p np 'P, (n =4, 5, and 6) have been determined.

We demonstrate that ternary NiCoP nanoparticles can be self-assembled on graphene at room temperature by a solution-phase method and our electrode materials exhibit a high performance for LIBs and supercapacitors.

An m-Ni3S4 NRs/g-C3N4 NS/N-G hybrid with heterostructured architecture demonstrates outstanding properties for both water splitting and SIB use.