Heterolayered 2D nanohybrids of uniformly stacked transition metal dichalcogenide–transition metal oxide monolayers with improved energy-related functionalities

Heterolayered 2D nanohybrids of uniformly stacked transition metal dichalcogenide (TMD)–transition metal oxide (TMO) monolayers are synthesized by a self-assembly of exfoliated nanosheets (NSs) with charge-balancing cations. This is the first example of a layer-by-layer-ordered 2D nanohybrid of exfo...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2018, Vol.6 (31), p.15237-15244
Main Authors: Jin, Xiaoyan, Shin, Seung-Jae, Kim, Jungeun, Lee, Nam-Suk, Kim, Hyungjun, Hwang, Seong-Ju
Format: Article
Language:English
Subjects:
Batteries
Cations
Chalcogenides
Charge transfer
Density functional theory
Heterostructures
Hydrogen evolution reactions
Hydrogen storage
Kinetics
Lithium-ion batteries
Manganese dioxide
Metal oxides
Metals
Molybdenum disulfide
Monolayers
Nanostructure
Porosity
Reaction kinetics
Rechargeable batteries
Self-assembly
Stabilization
Transition metal oxides
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Heterolayered 2D nanohybrids of uniformly stacked transition metal dichalcogenide (TMD)–transition metal oxide (TMO) monolayers are synthesized by a self-assembly of exfoliated nanosheets (NSs) with charge-balancing cations. This is the first example of a layer-by-layer-ordered 2D nanohybrid of exfoliated TMD and TMO nanosheets. The homogeneous incorporation of MnO 2 NSs into restacked MoS 2 NSs is quite effective in improving the multifunctionality of MoS 2 as an electrocatalyst for the hydrogen evolution reaction (HER) and electrode for Li-ion batteries, underscoring the universal merit of layer-by-layer ordering of TMD and TMO NSs. In situ spectroscopic analysis of the present TMD–TMO nanohybrid during the electrocatalytic reaction highlights the efficient interfacial charge transfer of the restacked nanosheets with enhanced porosity. The beneficial effect of incorporated TMO NSs on the performance of TMD NSs is attributable to an efficient interfacial charge transfer and increased porosity with depressed self-stacking of NSs and the stabilization of the metallic 1T TMD phase, resulting in the improvement of charge transfer kinetics, the enhancement of reactivity, and the provision of many reaction sites upon hybridization. Density functional theory (DFT) calculations further support the stabilization of the 1T TMD structure over the 2H TMD one via the interaction with neighboring TMO NSs. The present study clearly demonstrates that the restacking of the colloidal mixtures of TMO and TMD NSs can provide an effective way to explore novel multifunctional heterostructures.
ISSN:2050-7488
2050-7496
DOI:10.1039/C8TA04167A