Beyond the Platinum Era─Scalable Preparation and Electrochemical Activation of TaS2 Flakes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43926209" target="_blank" >RIV/60461373:22310/23:43926209 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22320/23:43926209 RIV/60461373:22810/23:43926209
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acsami.2c20261" target="_blank" >https://pubs.acs.org/doi/10.1021/acsami.2c20261</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acsami.2c20261" target="_blank" >10.1021/acsami.2c20261</a>
Alternative languages
Result language
angličtina
Original language name
Beyond the Platinum Era─Scalable Preparation and Electrochemical Activation of TaS2 Flakes
Original language description
Among 2D materials, transition-metal dichalcogenides (TMDCs) of group 5 metals recently have attracted substantial interest due to their superior electrocatalytic activity toward hydrogen evolution reaction (HER). However, a straightforward and efficient synthesis of the TMDCs which can be easily scaled up is missing. Herein, we report an innovative, simple, and scalable method for tantalum disulfide (TaS2) synthesis, involving CS2 as a sulfurizing agent and Ta2O5 as a metal precursor. The structure of the created TaS2 flakes was analyzed by Raman, XRD, XPS, SEM, and HRTEM techniques. It was demonstrated that a tuning between 1T (metallic) and 3R (semiconductor) TaS2 phases can be accomplished by varying the reaction conditions. The created materials were tested for HER, and the electrocatalytic activity of both phases was significantly enhanced by electrochemical self-activation, up to that comparable with the Pt one. The final values of the Tafel slopes of activated TaS2 were found to be 35 and 43 mV/dec for 3R-TaS2 and 1T-TaS2, respectively, with the corresponding overpotentials of 63 and 109 mV required to reach a current density of 10 mA/cm2. We also investigated the mechanism of flake activation, which can be attributed to the changes in the flake morphology and surface chemistry. Our work provides a scalable and simple synthesis method to produce transition-metal sulfides which could replace the platinum catalyst in water splitting technology. © 2023 American Chemical Society.
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
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/GA22-02022S" target="_blank" >GA22-02022S: Hybrid materials and advanced structures for mimicking natural photosynthesis</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS Applied Materials and Interfaces
ISSN
1944-8244
e-ISSN
—
Volume of the periodical
15
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
5679-5686
UT code for WoS article
000921731800001
EID of the result in the Scopus database
2-s2.0-85146907071