| Autor: |
Kumar S P, Arunachala, Kartigueyane, Saravanan, Rajendra, Saradh Prasad, Rajaram, Rajamohan, AlSalhi, Mohamad S., Angaiah, Subramania |
| Zdroj: |
Energy & Fuels; November 2024, Vol. 38 Issue: 21 p21219-21231, 13p |
| Abstrakt: |
In recent advancements, bimetal MXene has emerged as a promising electrocatalyst as well as a catalytic supportive material due to its unique properties, including rich chemistry and potential metal-like conductivity. This study introduces a novel bifunctional electrocatalyst for overall water splitting, involving the synthesis of sea urchin-like CoNi2Se4onto Ti2NbC2Txusing a simple two-step solvothermal method. The developed CoNi2Se4@Ti2NbC2Txis subjected to physical and surface topographical investigation using X-ray diffraction, field-emission scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy techniques. The synergistic effect of the prepared bifunctional nanocomposite shows extraordinary kinetic metrics for both HER and OER processes. It shows a low overpotential of 76 mV at 10 mA cm–2and a small Tafel slope of 78.6 mV dec–1for the HER and an overpotential of 203 mV at 10 mA cm–2with a Tafel slope of 102.2 mV dec–1for the OER. CoNi2Se4@Ti2NbC2Txexhibits a lower exchange current density with an onset potential that highlights its enhanced performance. This CoNi2Se4@Ti2NbC2Txelectrocatalyst has achieved a current density of 10 mA cm–2at 1.55 V and maintained excellent electrocatalytic stability for 24 h. It reveals that CoNi2Se4@Ti2NbC2Txcould be used as a cost-effective and efficient catalyst, paving the way for its application in clean hydrogen production through overall water splitting. Owing to its better electrochemical behavior, the prepared CoNi2Se4@Ti2NbC2Txmaterial is also used as the electrode material for supercapacitor applications, and it exhibits a specific capacitance of about 2.05 F cm–2at 2 mA cm–2. |
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