Atomic-Scale Edge Morphology, Stability, and Oxidation of Single-Layer 2H-TaS2

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F20%3A73603953" target="_blank" >RIV/61989592:15310/20:73603953 - isvavai.cz</a>

Result on the web

<a href="https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/cplu.202000599" target="_blank" >https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/cplu.202000599</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/cplu.202000599" target="_blank" >10.1002/cplu.202000599</a>

Result language

angličtina

Original language name

Atomic-Scale Edge Morphology, Stability, and Oxidation of Single-Layer 2H-TaS2

Original language description

Tantalum disulphide belongs to the group of transition metal dichalcogenides (TMDs) and has attracted attention for its unique structural, electronic, and catalytic properties. Herein, we report the edge properties of single-layer 2H-TaS2 studied by using density functional theory calculations, because the knowledge of the edge morphology, stability, and surface energy is essential for the determination of nanoparticle shapes and understanding the nature of catalytically active sites. We calculate the grand canonical potential of TaS2 clusters having various edge morphologies to evaluate the edge energies of the Ta-edge and S-edge terminated surfaces. Under S-rich conditions, the most likely shape of TaS2 is a deformed hexagon dominated by the Ta-edge covered by S monomers, while the triangular shape is preferred under S-poor conditions. Exposed edges of the single-layer TaS2 are susceptible to oxidation in air because both oxygen adsorption and substitution at the edge are strongly exothermic, -0.96 and -2.20 eV for single O atom, respectively. The XPS calculation shows that specific initial steps of oxidative process (adsorption, vacancy creation, substitution) are unlikely to be distinguished in the XPS spectra due to small shift of respective binding energies, but initial edge oxidation of TaS2 should be observable by an asymmetry of the Ta 4f doublet towards higher binding energies.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

<a href="/en/project/EF16_019%2F0000754" target="_blank" >EF16_019/0000754: Nanotechnologies for Future</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

ChemPlusChem

ISSN

2192-6506

e-ISSN

—

Volume of the periodical

85

Issue of the periodical within the volume

12

Country of publishing house

DE - GERMANY

Number of pages

8

Pages from-to

2557-2564

UT code for WoS article

000603402700004

EID of the result in the Scopus database

2-s2.0-85097038463