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Chalcogenide vacancies drive the electrocatalytic performance of rhenium dichalcogenides

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43918023" target="_blank" >RIV/60461373:22310/19:43918023 - isvavai.cz</a>

  • Alternative codes found

    RIV/61989592:15310/19:73597745

  • Result on the web

    <a href="https://pubs.rsc.org/en/content/articlepdf/2019/nr/c9nr03281a" target="_blank" >https://pubs.rsc.org/en/content/articlepdf/2019/nr/c9nr03281a</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1039/c9nr03281a" target="_blank" >10.1039/c9nr03281a</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Chalcogenide vacancies drive the electrocatalytic performance of rhenium dichalcogenides

  • Original language description

    The hydrogen evolution reaction (HER) is one of the most promising ways to produce clean energy. However, its wide-spread use is hindered by the price of the state-of-the-art catalysts based on precious metals. Transition metal dichalcogenide (TMD) nanomaterials are a cheap alternative, but a relatively large portion of them remains unexplored in terms of the HER. Here we report the HER performance of rhenium disulfide and diselenide in an acidic environment. We used sodium naphthalenide as an exfoliation agent. In comparison with other TMDs, the degree of exfoliation was relatively low. On the other hand, rhenium disulfide and diselenide both exhibit high chemical stability towards oxidation even after the exfoliation. The reported HER performance of the exfoliated rhenium dichalcogenides was strongly dependent on electrochemical treatment and to further enhance the performance, we used a series of electrochemical pretreatments at potentials as high as -2 V in sulfuric acid. While the morphology of the samples remained unchanged, the surface was found out to be chalcogen deficient, pointing out the formation of chalcogen vacancies. Consequentially, the HER performance was substantially enhanced. These results were corroborated by theoretical calculations showing improved bonding of hydrogen by chalcogenide vacancies at the surface. Our results show that a very simple electrochemical procedure can be used to improve the electrocatalytic performance of rhenium dichalcogenides and, possibly, also other TMDs.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10402 - Inorganic and nuclear chemistry

Result continuities

  • 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)

Others

  • Publication year

    2019

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Nanoscale

  • ISSN

    2040-3364

  • e-ISSN

  • Volume of the periodical

    11

  • Issue of the periodical within the volume

    31

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    7

  • Pages from-to

    14684-14690

  • UT code for WoS article

    000484297400016

  • EID of the result in the Scopus database

    2-s2.0-85070808541