Improved in hydrogen storage properties of MgH₂ catalyzed by as-prepared Graphene oxide-supported SnO₂ nanoparticles

Hydrogen has emerged as a promising clean energy carrier for automobile applications. Magnesium hydride (MgH₂) has garnered significant attention as a potential H₂ storage material due to its high capacity and low cost. Nonetheless, its practical use is hindered by unfavorable H₂ sorption kinetics and operating temperatures. This study presents a novel approach to enhance the H₂ storage properties of MgH₂ by adding graphene oxide (GO) supported tin dioxide (cSnO₂) nanoparticles. The as-prepared catalysts (GO/SnO₂) were synthesized through modified chemical methods followed by ball-milling with MgH₂ characterized using various techniques, including X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray and Fourier transform infrared spectroscopy (FTIR). The catalytic effect of GO-SnO₂ nanoparticles on MgH₂ was investigated through systematic H₂ sorption studies as well as thermal analysis. Results demonstrate that the onset temperature for H₂ desorption was significantly reduced, and the dehydrogenation kinetics were substantially enhanced.