Lu₂CrMnO₆ double perovskites: Sonochemical fabrication, optimization, characterization, and investigation of the electrochemical hydrogen storage properties

Dependence on fossil fuels results in significant environmental contamination and is a key factor in climate change. One possible remedy for these challenges is transitioning to renewable energy sources like hydrogen. This report uses a practical sonochemical approach to successfully create Lu₂CrMnO₆ (LCMO) nanostructures. These materials were developed through sonication and various alkaline solutions, adjusting ultrasound parameters and durations to enhance electrochemical hydrogen storage. Furthermore, we combined the optimal sample with g-C₃N₄ nanosheets for hydrogen storage utilizing an electrochemical technique. Different microscope varieties and spectroscopic technologies such as Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Energy-dispersive X-ray spectroscopy (EDX) and BET analysis, were used to evaluate the shape, size, and specific attributes of nanostructures. The effect of incorporating carbonous compounds (g-C₃N₄) regarding energy release and the material's performance was evaluated during multiple electrical tests. The LCMO/g-C₃N₄ nanomaterials can be used as a promising new combination for storing hydrogen through electrochemistry. The study revealed that [LCMO/g-C₃N₄50 %] nanocomposites are highly effective for hydrogen storage. The enhancement in hydrogen storage capacity to 494.72 mAhg⁻¹ at constant current 1 mA after 15 cycles can be attributed to the synergistic effects of LCMO and g-C₃N₄, which facilitate the charging and discharging processes.