Edge-exposed MoS2 nano-assembled structures are designed for high hydrogen evolution reaction activity and long term stability. The number of sulfur edge sites spheres sheets is confirmed by Raman spectroscopy EXAFS analysis. By controlling the morphology with formation assembly small-size fragments MoS2, resulting assembled have electrocatalytic HER thermodynamic

In this work, we reported a facile approach to prepare uniform copper ferrite nanoparticle-attached graphene nanosheet (CuFe2O4-GN). A one-step solvothermal method featuring the reduction of oxide and formation CuFe2O4 nanoparticles was efficient, scalable, green, controllable. The composite fully characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), photoelectron spectroscopy (XPS), which demonstrated that with diameter approximately 100 nm were densely compactly...

Multishell structured metal selenide nanocubes, namely, Co/(NiCo)Se₂ box-in-box structures with different shell compositions, were successfully synthesized by applying zeolitic imidazolate framework-67 (ZIF-67) as a template.

Highly porous MoSe2-reduced graphene oxide-carbon nanotube (MoSe2-rGO-CNT) powders were prepared by a spray pyrolysis process. The synergistic effect of CNTs and rGO resulted in containing ultrafine MoSe2 nanocrystals with minimal degree stacking. initial discharge capacities MoSe2-rGO-CNT, MoSe2-CNT, MoSe2-rGO, bare for sodium ion storage 501.6, 459.7, 460.2, 364.0 mA h g-1, respectively, at 1.0 A g-1. MoSe2-rGO-CNT composite had superior cycling rate performances compared the MoSe2-rGO...

Three-dimensional (3D) porous microspheres composed of CoSe2@N-doped carbon nanorod-deposited nanotube (CNT) building blocks (CoSe2@NC-NR/CNT) can be successfully synthesized using CNT/Co-based metal-organic framework (ZIF-67) as a precursor. This strategy involves the homogeneous coating ZIF-67 polyhedrons onto CNT prepared by spray pyrolysis and further selenization composites under an Ar/H2 atmosphere. During process, on backbone are transformed into N-doped carbon-coated CoSe2 nanorods...

Abstract For effective hydrogen production by water splitting, it is essential to develop earth‐abundant, highly efficient, and durable electrocatalysts. Herein, the authors report a bifunctional electrocatalyst composed of hollow CoS x Ni–Fe based layered double hydroxide (NiFe LDH) nanosheets for efficient overall splitting (OWS). The optimized heterostructure obtained electrodeposition NiFe LDH on metal–organic framework‐derived nanoarrays, which are supported nickel foam (H‐CoS @NiFe...

We introduce a simple process to synthesize few-layered MoS2 nanosheets supported on coaxial carbon nanotubes through an L-cysteine-assisted hydrothermal route, in which L-cysteine, cheap and ordinary amino acid, plays fundamental role controlling the morphology of hybrid material binder help growth surface nanotubes. It is also demonstrated that polypeptide formed by L-cysteine can be transformed into amorphous heat treatment under inert atmosphere. The materials exhibit high capacity...

Abstract Despite their high theoretical specific capacity (1675 mA h g −1 ), the practical application of Li–S batteries remains limited because rapidly degrades through severe dissolution lithium polysulfide and rate capability is low electronic conductivity sulfur. This paper describes novel hierarchical yolk–shell microspheres comprising 1D bamboo‐like N‐doped carbon nanotubes (CNTs) encapsulating Co nanoparticles (Co@BNCNTs YS microspheres) as efficient cathode hosts for batteries. The...

In this work, a facile salt-templated approach is developed for the preparation of hollow FeSe2 /graphitic carbon composite microspheres as sodium-ion battery anodes; these are composed interconnected multicavities and an enclosed surface in-plane embedded with uniform nanoparticles. As precursor, Fe2 O3 /carbon containing NaCl nanocrystals obtained using one-pot ultrasonic spray pyrolysis in which inexpensive dextrin used porogen source, respectively, enabling mass production composites....

A composite of modified graphene and LiFePO4 has been developed to improve the speed charging–discharging cycling stability lithium ion batteries using as a cathode material. Chemically activated (CA-graphene) successfully synthesized via activation by KOH. The as-prepared CA-graphene was mixed with prepare composite. Microscopic observation nitrogen sorption analysis have revealed surface morphologies CA-graphene/LiFePO4 Electrochemical properties also investigated after assembling coin...

Abstract In this work, a novel vacuum-assisted strategy is proposed to homogenously form Metal–organic frameworks within hollow mesoporous carbon nanospheres (HMCSs) via solid-state reaction. The method applied synthesize an ultrafine CoSe 2 nanocrystal@N-doped matrix confined HMCSs (denoted as @NC/HMCS) for use advanced anodes in high-performance potassium-ion batteries (KIBs). approach involves solvent-free thermal treatment Co-based zeolitic imidazolate framework (ZIF-67) the HMCS...

Uniquely structured CoSe2 -carbon nanotube (CNT) composite microspheres with optimized morphology for the hydrogen-evolution reaction (HER) are prepared by spray pyrolysis and subsequent selenization. The ultrafine nanocrystals uniformly decorate entire macroporous CNT backbone in -CNT microspheres. strongly improves electrocatalytic activity of improving electrical conductivity minimizing growth during synthesis process. In addition, structure resulting from increasing removal rate...

It is still a challenging task to develop facile and scalable process synthesize porous hybrid materials with high electrochemical performance. Herein, strategy developed for the synthesis of few-layer MoS2 incorporated into hierarchical carbon (MHPC) nanosheet composites as anode both Li- (LIB) Na-ion battery (SIB). An inexpensive oleylamine (OA) introduced not only serve hinder stacking nanosheets but also provide conductive carbon, allowing large scale production. In addition, SiO2...

In this manuscript, we introduce a facile hydrothermal method for the controlled growth of SnO2 nanoparticles onto graphene oxide. Hydrazine plays fundamental role in controlling formation and crystallization nanoparticles, reduction oxide to graphene. The SnO2–graphene composite consists 3–4 nm monodisperse nanocrystals homogeneously dispersed at surface It is demonstrated that can accommodate large volume change which occurs during lithiation–delithiation cycles. When used as an anode...

Novel porous carbon nanofibers with bimodal pores were synthesized by carbonization of electrospun zeolitic imidazole framework-8/polyacrylonitrile and further chemical activation.

Abstract Non‐aqueous sol‐gel routes involving the reaction of metal oxide precursors in organic solvents (e.g., benzyl alcohol) at moderate temperature and pressure, offer advantages such as high purity, reproducibility ability to control crystal growth without need using additional ligands. In this paper, a study carried out on series iron oxide/reduced graphene composites is presented elucidate structure‐properties relationship leading an improved electrochemical performance composites....

Two-dimensional (2D) MXenes are promising as electrode materials for energy storage, owing to their high electronic conductivity and low diffusion barrier. Unfortunately, similar most 2D materials, MXene nanosheets easily restack during the preparation, which degrades electrochemical performance of MXene-based materials. A novel synthetic strategy is proposed converting into restacking-inhibited three-dimensional (3D) balls coated with iron selenides carbon. This involves preparation...

Molybdenum disulfide (MoS₂)-based hybrid nanostructures have attracted much attention as promising alternatives to Pt-based electrocatalysts for the hydrogen evolution reaction.

Human backbone-like CoMoS₃@N-doped carbon nanostructures with multiple voids are successfully prepared by a metal–organic framework-based strategy and applied as anode materials for sodium ion batteries.