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

Abstract

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.