Fabrication of samarium oxide embedded carbon nanotubes electrocatalyst for oxygen evolution reaction
The economically unfeasible electrochemical breakdown ofwater is linked to the production of materialswith low overpotential using a simple method. The study demonstrates the fabrication and use of samarium oxide (Sm2O3) on carbon nanotubes (CNTs) as an effective and long-lasting electrocatalyst for oxygen evolution reaction (OER). X-ray diffraction analysis confirms fabrication of Sm2O3 embedded CNTs (Sm2O3/CNTs) phases with 0.052 nm lattice strain, while scanning electron microscopy structural analysis shows a ball-like shape with 78 nm average particle size. The synthesized catalyst performs well, attaining a current density of 10 mA cm−2 and having an onset potential of 1.33 V versus reversible hydrogen electrode (RHE). In contrast to Sm2O3 and CNT, which exhibit higher overpotentials of 311 and 342 mV with corresponding Tafel slopes of 62 and 83 mV dec−1, respectively, Sm2O3‒CNT has a low Tafel slope of 38 mV dec−1 and a lower overpotential of 276mV. With a current density of more than 50mA cm−2, the catalyst demonstrated remarkable stability over 180 h. The electrochemical impedance spectroscopy analysis attributed the robust ionic conductivity of K+ ions, their small hydration sphere, and reduced electrode impedance to their Rct value of 3.4 Ω. The composite potential of CNTs and Sm2O3 as a long-term and effective OER electrocatalysis substitute has been demonstrated through promising results.
A comprehensive study was conducted to explore the photoelectrochemical (PEC) water-splitting performance of metal vanadates, MeV2O6 (Me = Zn, Cu, Ni), with a focus on morphology optimization and…
The economically unfeasible electrochemical breakdown ofwater is linked to the production of materialswith low overpotential using a simple method. The study demonstrates the fabrication and use…
The global energy shortage and urgent need to mitigate energy-related fatalities have driven a pressing demand for highly efficient energy storage systems. Supercapacitors (SCs) have emerged as…