Electrocatalytic Activation in ReSe-VSe Alloy Nanosheets to Boost Water-Splitting Hydrogen Evolution Reaction.

It is challenging to control the electronic structure of 2D transition metal dichalcogenides (TMD) for extended applications in renewable energy devices. Here, ReSe-VSe (Re VSe) alloy nanosheets over the whole composition range via a colloidal reaction is synthesized. Increasing x makes the nanosheets more metallic and induces a 1T″-to-1T phase transition at x = 0.

The electronic structure of a strongly bound sandwich MoS-WS heterobilayer.

First of all, we show that two kinds of sandwich bilayers (BLs) are dynamically, thermally, and mechanically stable, which are degenerate p-type materials with intercalated Ca atoms, , Nb-doped MoS homobilayers (HoBLs) and Nb-doped WS-MoS heterobilayers (HtBLs) with 25% Nb content. Specifically, their interlayer bindings are five times stronger than van der Waals interactions in their pristine counterparts. Both of them are semiconductors with indirect band gaps in the visible region within the HSE06 exchange-correlation functional.

Composition-Tuned (MoWV)Se Ternary Alloy Nanosheets as Excellent Hydrogen Evolution Reaction Electrocatalysts.

Ternary alloying of transition metal dichalcogenides (TMDs) has the potential for altering the electronic structure of materials to suit electrochemical applications. Herein, we synthesized (MoWV)Se nanosheets at various compositions a colloidal reaction. The mole fraction of V atoms () was successfully increased up to 0.

Effect of temperature on structural, dynamical, and electronic properties of ScTe from first-principles calculations.

The compounds ScTe and SbTe have the same crystal structure. Ge-Sb-Te alloys are also the most common prototype phase change memory (PCM) compounds in the GeTe-SbTe pseudo-binary combination. Recently, alloying Sc atoms into SbTe has enabled sub-nanosecond switching in large conventional phase-change random access memory (PCRAM) devices.

Polymorphic GaS nanowires: phase-controlled growth and crystal structure calculations.

The polymorphism of nanostructures is of paramount importance for many promising applications in high-performance nanodevices. We report the chemical vapor deposition synthesis of GaS nanowires (NWs) that show the consecutive phase transitions of monoclinic (M) → hexagonal (H) → wurtzite (W) → zinc blende (C) when lowering the growth temperature from 850 to 600 °C. At the highest temperature, single-crystalline NWs were grown in the thermodynamically stable M phase.

Full Composition Tuning of WNbSe Alloy Nanosheets to Promote the Electrocatalytic Hydrogen Evolution Reaction.

Composition modulation of transition metal dichalcogenides is an effective way to engineer their crystal/electronic structures for expanded applications. Here, fully composition-tuned WNbSe alloy nanosheets were produced via colloidal synthesis. These nanosheets ultimately exhibited a notable transition between WSe and NbSe hexagonal phases at = 0.

MoSe -VSe -NbSe Ternary Alloy Nanosheets to Boost Electrocatalytic Hydrogen Evolution Reaction.

Alloying of transition metal dichalcogenides (TMDs) is a pioneering method for engineering electronic structures with expanded applications. In this study, MoSe -VSe -NbSe ternary alloy nanosheets are synthesized via a colloidal reaction. The composition is successfully tuned over a wide range to adjust the 2H-1T phase transition.

WSe-VSe Alloyed Nanosheets to Enhance the Catalytic Performance of Hydrogen Evolution Reaction.

Tuning the electronic structures of transition metal dichalcogenides (TMD) is essential for their implementation in next-generation energy technologies. In this study, we synthesized composition-tuned WSe-VSe (WVSe, = 0-1) alloyed nanosheets using a colloidal reaction. Alloying the semiconducting WSe with VSe converts the material into a metallic one, followed by a 2H-to-1T phase transition at = 0.

Polytypic Phase Transition of NbVSe via Colloidal Synthesis and Their Catalytic Activity toward Hydrogen Evolution Reaction.

Polytypes of two-dimensional transition metal dichalcogenide can extend the architecture and application of nanostructures. Herein, NbVSe alloy nanosheets in the full composition range () were synthesized by a colloidal reaction. At = 0.