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Enhanced catalytic activity in strained chemically exfoliated WS 2 nanosheets for hydrogen evolution

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TLDR
Analyses indicate that the enhanced electrocatalytic activity of WS₂ is associated with the high concentration of the strained metallic 1T (octahedral) phase in the as-exfoliated nanosheets.
Abstract
Efficient evolution of hydrogen via electrocatalysis at low overpotentials is promising for clean energy production. Monolayered nanosheets of chemically exfoliated WS2 are shown to be efficient catalysts for hydrogen evolution at very low overpotentials. The enhanced catalytic performance is associated with the high concentration of the strained metallic octahedral phase in the exfoliated nanosheets.

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The Phases of WS2 Nanosheets Influence Uptake, Oxidative Stress, Lipid Peroxidation, Membrane Damage, and Metabolism in Algae.

TL;DR: Insight is provided into the environmentally friendly design of two-dimensional TMDCs with higher levels of cellular uptake, oxidative stress, lipid peroxidation, membrane damage, and inhibition of photosynthesis than Ae-WS2 in Chlorella vulgaris.
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Scalable synthesis of Mo2C/CNT networks as highly efficient and stable electrocatalyst for hydrogen evolution reaction

TL;DR: Mo2C/CNT-SC as discussed by the authors is an efficient and stable Mo2C-CNT hybrid via spray drying followed by carbonization process, which can not only provide sufficient HER active sites, but also guarantee full contact between the Mo 2C nanoparticles and CNT networks.
Journal ArticleDOI

Rhenium dichalcogenides (ReX2, X = S or Se): an emerging class of TMDs family

TL;DR: In this article, a review of the 2D transition metal dichalcogenides (ReX2, X = S or Se) is presented, where the diamond-shaped chains (DS-chains) comprising interlinked Re4 clusters make the structure anisotropic.
Journal ArticleDOI

Well-dispersed CoS2 nano-octahedra grown on a carbon fibre network as efficient electrocatalysts for hydrogen evolution reaction

TL;DR: In this article, a confinement strategy for preparing well-dispersed octahedral CoS2 nanocrystals through in situ sulfidization of the carbon fibre-wrapped Co nanoparticles, in order to fully expose the active sites of every nanocatalytic unit was proposed.
Journal ArticleDOI

Direct synthesis and in situ characterization of monolayer parallelogrammic rhenium diselenide on gold foil

TL;DR: In this paper, the authors describe the direct CVD growth of high-quality monolayer ReSe2 single crystals with a parallelogram shape arising from its anisotropic structure on a gold foil substrate.
References
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Journal ArticleDOI

Generalized Gradient Approximation Made Simple

TL;DR: A simple derivation of a simple GGA is presented, in which all parameters (other than those in LSD) are fundamental constants, and only general features of the detailed construction underlying the Perdew-Wang 1991 (PW91) GGA are invoked.
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Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set.

TL;DR: An efficient scheme for calculating the Kohn-Sham ground state of metallic systems using pseudopotentials and a plane-wave basis set is presented and the application of Pulay's DIIS method to the iterative diagonalization of large matrices will be discussed.
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Projector augmented-wave method

TL;DR: An approach for electronic structure calculations is described that generalizes both the pseudopotential method and the linear augmented-plane-wave (LAPW) method in a natural way and can be used to treat first-row and transition-metal elements with affordable effort and provides access to the full wave function.
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Atomically thin MoS2: a new direct-gap semiconductor

TL;DR: The electronic properties of ultrathin crystals of molybdenum disulfide consisting of N=1,2,…,6 S-Mo-S monolayers have been investigated by optical spectroscopy and the effect of quantum confinement on the material's electronic structure is traced.
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Single-layer MoS2 transistors

TL;DR: Because monolayer MoS(2) has a direct bandgap, it can be used to construct interband tunnel FETs, which offer lower power consumption than classical transistors, and could also complement graphene in applications that require thin transparent semiconductors, such as optoelectronics and energy harvesting.
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