Electrocatalysis of layered Group 5 metallic transition metal dichalcogenides (MX2, M = V, Nb, and Ta; X = S, Se, and Te)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F16%3A43901914" target="_blank" >RIV/60461373:22310/16:43901914 - isvavai.cz</a>

Alternative codes found

RIV/61989592:15310/16:33161242

Result on the web

<a href="http://pubs.rsc.org/-/content/articlehtml/2016/ta/c6ta05110c" target="_blank" >http://pubs.rsc.org/-/content/articlehtml/2016/ta/c6ta05110c</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c6ta05110c" target="_blank" >10.1039/c6ta05110c</a>

Result language

angličtina

Original language name

Electrocatalysis of layered Group 5 metallic transition metal dichalcogenides (MX2, M = V, Nb, and Ta; X = S, Se, and Te)

Original language description

The revelation of MoS2 as an efficient electrocatalyst for the hydrogen evolution reaction (HER) has ratcheted up interest in other transition metal dichalcogenides (TMDs). To date, extensive studies have been focused towards semiconducting Group 6 TMDs while research into metallic Group 5 TMDs has been comparatively limited. Past computational screening of Group 5 TMDs showed propitious Gibbs free energy of the adsorbed hydrogen (DGH) for HER, especially for VS2, which prompted us to experimentally explore their HER efficiency. In addition to the HER electrocatalytic performance, we examine the inherent electrochemistry and the charge-transfer property of the entire set of Group 5 TMDs in the bulk form: VS2, VSe2, VTe2, NbS2, NbSe2, NbTe2, TaS2, TaSe2 and TaTe2. We demonstrate that the nine Group 5 TMDs show distinctive inherent electroactivities arising from their intrinsic electrochemical processes or surface oxides. TaS2 possesses the fastest heterogeneous electron transfer (HET) rate at 3.4 x 10(-3) cm s(-1) amongst the Group 5 TMDs and may be ideal for electrochemical sensing. Chalcogen dependence is evident in the electrochemical charge-transfer ability of the Group 5 TMDs whereby tellurides show slower HET rates than sulfides and selenides. We identify VTe2 as the best-performing material for HER contrary to the widely predicted VS2. VTe2 manifests the lowest HER overpotential at 0.5 V vs. RHE and Tafel slope of 55 mV dec(-1).This fundamental study provides fresh insights into the electrochemical and electrocatalytic characteristics of metallic Group 5 TMDs that will be indispensable for the development of TMDs in future applications.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CA - Inorganic chemistry

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

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

Name of the periodical

Journal of Materials Chemistry A

ISSN

2050-7488

e-ISSN

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Volume of the periodical

4

Issue of the periodical within the volume

37

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

14241-14253

UT code for WoS article

000384444200021

EID of the result in the Scopus database

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