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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Sajdl, Petr
University of Chemistry and Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2024Measurement system for in-situ estimation of instantaneous corrosion rate in supercritical watercitations
- 2023Beyond the Platinum Era─Scalable Preparation and Electrochemical Activation of TaS2 Flakescitations
- 2023Exploring morphological diversity of Q-carbon structures through laser energy density variationcitations
- 2022KrF Laser and Plasma Exposure of PDMS–Carbon Composite and Its Antibacterial Propertiescitations
- 2022Carbon Transformation Induced by High Energy Excimer Treatmentcitations
- 2022Surface modifications of a silicalite film designed for coating orthopaedic implantscitations
- 2022Plasma treatment of PTFE at elevated temperature: The effect of surface properties on its biological performancecitations
- 2021The effect of material and process parameters on the surface energy of polycaprolactone fibre layerscitations
- 2020Studium oxidových vrstev na slitinách zirkonia Ramanovou spektroskopií
- 2020Zr alloy protection against high-temperature oxidation: Coating by a double-layered structure with active and passive functional propertiescitations
- 2020Raman study of oxide layers on zirconium alloys using 18O tracerscitations
- 2020Cellulose acetate honeycomb-like pattern created by improved phase separationcitations
- 2017Nanocrystalline diamond protects Zr cladding surface against oxygen and hydrogen uptake : Nuclear fuel durability enhancementcitations
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article
Beyond the Platinum Era─Scalable Preparation and Electrochemical Activation of TaS2 Flakes
Abstract
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.