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Applications of 2D MXenes in energy conversion and storage systems

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TLDR
The potential of MXenes for the photocatalytic degradation of organic pollutants in water, such as dye waste, is addressed, along with their promise as catalysts for ammonium synthesis from nitrogen.
Abstract
Transition metal carbides and nitrides (MXenes), a family of two-dimensional (2D) inorganic compounds, are materials composed of a few atomic layers of transition metal carbides, nitrides, or carbonitrides. Ti3C2, the first 2D layered MXene, was isolated in 2011. This material, which is a layered bulk material analogous to graphite, was derived from its 3D phase, Ti3AlC2 MAX. Since then, material scientists have either determined or predicted the stable phases of >200 different MXenes based on combinations of various transition metals such as Ti, Mo, V, Cr, and their alloys with C and N. Extensive experimental and theoretical studies have shown their exciting potential for energy conversion and electrochemical storage. To this end, we comprehensively summarize the current advances in MXene research. We begin by reviewing the structure types and morphologies and their fabrication routes. The review then discusses the mechanical, electrical, optical, and electrochemical properties of MXenes. The focus then turns to their exciting potential in energy storage and conversion. Energy storage applications include electrodes in rechargeable lithium- and sodium-ion batteries, lithium-sulfur batteries, and supercapacitors. In terms of energy conversion, photocatalytic fuel production, such as hydrogen evolution from water splitting, and carbon dioxide reduction are presented. The potential of MXenes for the photocatalytic degradation of organic pollutants in water, such as dye waste, is also addressed, along with their promise as catalysts for ammonium synthesis from nitrogen. Finally, their application potential is summarized.

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Nitrogen-Containing Gas Sensing Properties of 2-D Ti2N and Its Derivative Nanosheets: Electronic Structures Insight

TL;DR: In this article, the potentials of two-dimensional Ti2N and its derivative nanosheets for some harmful nitrogen-containing gas (NCG) adsorption and sensing applications have been unveiled based on the quantum-mechanical Density Functional Theory calculations.
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An electrical microenvironment constructed based on electromagnetic induction stimulates neural differentiation

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Journal ArticleDOI

Graphene-mediated dense integration of Ti3C2Tx MXene monoliths for compact energy storage: Balancing kinetics and packing density

TL;DR: In this paper , the authors reported highly dense Ti3C2Tx MXene monoliths with hierarchical porous structure involving a graphene-assisted hydrothermal method followed by capillary evaporation.
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Recent Advancements in Selenium-Based Cathode Materials for Lithium Batteries: A Mini-Review

TL;DR: In this paper , the authors briefly examined numerous approaches to overcome these obstacles, including selecting an adequate electrolyte, the composition of Se with carbonaceous materials, and the usage of metal selenide base electrodes.
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Nanoparticles of Fe3O4 Anchored on Ti3C2Tx MXene/rGO Aerogels as Hybrid Negative Electrodes for Advanced Supercapacitors

TL;DR: In this paper , a 3D hierarchical porous structure of the aerogel and intimate anchoring of Fe3O4 nanoparticles on the Ti3C2Tx/rGO (M/G) nanosheets are successfully fabricated by a one-step hydrothermal gelation process.
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TL;DR: An overview of the synthesis, properties, and applications of graphene and related materials (primarily, graphite oxide and its colloidal suspensions and materials made from them), from a materials science perspective.
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Combining theory and experiment in electrocatalysis: Insights into materials design

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Two‐Dimensional Nanocrystals Produced by Exfoliation of Ti 3 AlC 2

TL;DR: 2D nanosheets, composed of a few Ti 3 C 2 layers and conical scrolls, produced by the room temperature exfoliation of Ti 3 AlC 2 in hydrofl uoric acid are reported, which opens a door to the synthesis of a large number of other 2D crystals.
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