Metallic 1T′-MoTe₂ Nanoparticle-Incorporated Graphene for Enhanced High Current Hydrogen Evolution and Supercapacitor Performance

Abstract

The achievement of excellent electrochemically active materials integrating bifunctional hydrogen evolution and supercapacitor performance is very promising in practice. Herein, metallic 1T′-MoTe2 nanoparticles immobilized on reduced graphene oxide (1T′-MoTe2 NPs/rGO) were constructed by in situ tellurization of uniform MoO2 nanospheres. Benefiting from the interaction between 1T′-MoTe2 NPs and rGO via a C–O–Mo bond, the as-obtained 1T′-MoTe2 NPs/rGO has excellent electrochemical activity and kinetics. As a catalyst, 1T′-MoTe2 NPs/rGO exhibited efficient HER performance, and a high current density (1 A cm–2) has been achieved with an overpotential of 520 mV. Furthermore, the cooperative effect of improved conductivity and increased specific surface areas enables the assembling asymmetric 1T′-MoTe2 NPs/rGO//active carbon supercapacitor to exhibit high energy storage performance (98.8 F g–1 at 1 A g–1), excellent rate capacitance, and high operational stability. This work offers a feasible method to construct a multifunctional nanocomposite for green energy generation and storage.

Strategies for Advanced Supercapacitors Based on 2D Transition Metal Dichalcogenides: From Material Design to Device Setup

“…[45] More and more strategies such as chemical vapor deposition, ion intercalation, space confinement have been applied to obtain the expected phase constitution (Figure 6e,f). [162,163] After more controllable synthesis is achieved, future researches are expected to combine doping, morphology and structure, composite, and other strategies with phase engineering to optimize the performance of 2D TMDsbased SCs and the structure-performance relationship can be more clearly understood.…”

“…Reproduced with permission. [ 162 ] Copyright 2022, American Chemical Society. f) The molecular model illustration for the underlying mechanisms of solvated‐ion‐intercalated reaction and properties of the intercalated 1T MoS 2 nanosheets.…”

“…e) Schematic diagram of the preparation steps of 1T′-MoTe 2 NPs/rGO. Reproduced with permission [162]. Copyright 2022, American Chemical Society.…”

A 1T-WS2 “electron pump” regulates charge transfer over ZnCdS/NiV-LDH p–n heterostructures for enhanced photocatalytic hydrogen evolution

“…These layers are constrained by the interaction of van der Waals forces and stacked to form a hexagonal structure. 1T metal phase VIB metal chalcogenides have been widely studied in recent years and are widely used in electrocatalysis, 33 photocatalysis, 34 supercapacitors, 35 and batteries. 36 Layered double hydroxides (LDHs), specifically, are layered compounds composed of positively charged brucite-like layers, anions, and water charge compensation layers.…”

“…These layers are constrained by the interaction of van der Waals forces and stacked to form a hexagonal structure. 1T metal phase VIB metal chalcogenides have been widely studied in recent years and are widely used in electrocatalysis, 33 photocatalysis, 34 supercapacitors, 35 and batteries. 36…”