MoS₂ Nanosheet Assembling Superstructure with a Three-Dimensional Ion Accessible Site: A New Class of Bifunctional Materials for Batteries and Electrocatalysis

Abstract

The layered molybdenum disulfide (MoS 2 ) nanostructured materials are of great interest for electrochemical energy storage and conversion and electrocatalytic water splitting. However, they still exhibit very limited performance because of their limited active sites. To create more efficient MoS 2 materials, herein, we develop a simple yet efficient approach to a unique column-like MoS 2 superstructure composed of edge-terminated MoS 2 nanosheets (CLET MoS 2 ). These MoS 2 nanosheets as building blocks with fully exposed active edges are oriented in a preferred manner, rendering CLET MoS 2 that exhibits excellent electrochemical performance in both lithium ion storage and hydrogen evolution reaction (HER). Compared with that of commercial MoS 2 , these hierarchical MoS 2 superstructures possess much higher specific capacity and superior cycling performance for lithium ion storage and excellent electrocatalytic activity and stability for HER with a very low Tafel slope of 39 mV decade −1 , showing their great potential applications in lithium ion batteries and water splitting.

Interlayer Nanoarchitectonics of Two‐Dimensional Transition‐Metal Dichalcogenides Nanosheets for Energy Storage and Conversion Applications

“…[77] On the other hand, several groups have synthesized non-expanded MoS 2 at reaction temperatures ≥ 200 °C, which may also support this deduction. [16,[87][88][89] Reaction time is also found to be an important parameter for obtaining interlayer-expanded MX 2 . Tian and co-workers revealed that MoS 2 nanosheets prepared under hydrothermal conditions at 200 °C show time-dependent interlayer spacing.…”

Engineered 2D Transition Metal Dichalcogenides—A Vision of Viable Hydrogen Evolution Reaction Catalysis

“…Improvements on the catalytic performance have been realized via the following strategies: i)the formation of nanomaterials and amorphous phases; [ 33–41 ] ii)the edge‐aligned TMDs, [ 42–51 ] and iii)3D porous TMDs. [ 52–59 ] …”

The effect of citric acid on the catalytic activity of nano‐sized MoS2 toward sulfur‐resistant CO methanation

“…Over the past few years, inorganic nanomaterials have drawn much attention because of their functional properties and potential applications, such as electrochemical hydrogen storage, supercapacitor, magnesium batteries and industrial catalysts . Nano‐sized transition metal sulfide MoS 2 , one of the famous inorganic nanomaterials, was commonly used as catalyst for CO methanation and hydrodesulfurization .…”