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Electrocatalytic water splitting is an essential hydrogen production method for resolving present energy shortage and progress toward more efficient technologies. For this purpose, a versatile and cheap electrocatalysts are the main challenge along the way. In this report, we synthesized vanadium telluride and carbon nanotube (VTe–CNT)‐based nanocomposite via facile hydrothermal route. The VTe–CNTs are characterized by X‐ray diffraction analysis, scanning electron microscopy, energy‐dispersive spectroscopy, Fourier transform infrared spectroscopy, and Brunauer–Emmett–Teller. These characterizations depict nanosphere structures, morphology, and high surface area that maintains high porosity, which are essential for inclusive water‐splitting phenomena in 1.0 M solution of KOH. Additionally, the electrochemical performance of VTe–CNTs has shown best O2 evolution reactions activity with of onset potential of 1.42 V versus reversible hydrogen electrode and required 10 mA/cm2 of current density at 278 mV overpotential, which is excellent among other electrocatalysts, VTe (342 mV@10 mA/cm−2) and CNTs (365 mV@10mA/cm−2). Moreover, VTe–CNT exhibits remarkable stability for almost 20 h. It also requires a low onset potential of 0.05 V with a small Tafel slope of 47 mV/dec for H2 evolution reactions. Hence, this research might facilitate the easy transportation of electrons and open up the new era, serving as an excellent replacement for noble metal–derived materials. [ABSTRACT FROM AUTHOR]

Electrochemical water splitting is one of the promising approaches for the production of molecular hydrogen as well as to meet the clean and sustainable energy demand of the modern world. However, the key task for the research communities is to design a cost‐effective and efficient electrocatalyst to contribute positively to recent world crises. This study presents a novel SiO2@TiN nanocomposite and utilize it for oxygen evolution reaction (OER) as an electrocatalysts. The different techniques use for the characterization of SiO2@TiN nanocomposite. The electrochemical investigations encompass linear sweep voltammetry (LSV), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) which collectively yield critical parameters for assessing electrocatalytic performance. At a current density of 10 mAcm−2 the SiO2@TiN nanocomposite has a substantially lower overpotential of 256 mV compared to pure SiO2 and TiN. The composite also shows smaller tafel slope of 40 mV dec−1 as well as lower overpotential. The SiO2@TiN nanocomposite also demonstrates the enhanced redox activity as a result of its synergistic effect. Consequently, the increased electrical conductivity of TiN facilitates the attachment of metal oxides and more active sites are exposed to improve the OER activity of the fabricated materials. [ABSTRACT FROM AUTHOR]

Significant energy conversion systems like hydrogen production will necessitate the creation of an affordable oxygen evolution reaction (OER). In this field, numerous materials are investigated, especially under more advantageous alkaline environments, and among all transition metal chalcogenides have shown a great promise for OER. On the other hand, when all chalcogenides are oxidized in alkaline conditions, they are thermodynamically less stable than hydroxides and oxides materials. The in-situ molecular, physical, and surface morphology of all the synthesized materials are confirmed via various analytical techniques and then employed for oxygen evolution process (OER) in an alkaline media. In consideration, the VTe/CuO nanostructures grown on surface of copper mesh (CM) as a substrate have enhanced OER functionality compared to VTe and CuO nanostructures. In comparison to CuO and VTe, nanocomposite has a lower overpotential around 316 mV, a smaller Tafel value around 81 mV dec−1, and long-term stability up to 35 h. The very large specific surface area, lower overpotential, smaller tafel slope, and low resistance of VTe/CuO make it a superior component for upcoming uses. This work illustrates the usefulness of an interface-engineering technique for developing effective electrocatalyst for oxygen evolution process employing transition metal chalcogenides. [Display omitted] • VTe/CuO electrode exhibits a low overpotential of 311 mV showcasing its good efficiency. • VTe/CuO nano-composite achieved tafel slope of 74 mV/dec, with smaller Rct value of 128 Ω. • The synthesized electrode achieves a long-term stability for elongated 30 h, and for 1000 CV cycles. [ABSTRACT FROM AUTHOR]