Abstract
The H uptake/release performance of Mg is studied by combining transition metal (Ni) and lightweight C-based (rGO) catalysts. Further, the effect of the synthesis route on the morphology and catalytic ability of rGO is understood by synthesizing it via electrochemical (erGO), chemical (crGO) and thermal (trGO) exfoliation. These rGOs (10 wt%) and 3 atom% of Ni were ball-milled with Mg and subjected to isothermal H uptake at 15 bar and 320 °C. The Mg97-Ni03-erGO nanocomposite shows the lowest incubation period of 2–3 h, whereas it is 8–9 h for Mg97-Ni03-trGO. Moreover, the Mg97-Ni03-erGO nanocomposite shows the lowest onset temperature of H release at 275 °C, which is 300 °C in the case of Mg97-Ni03-trGO. From the spectroscopic analysis, it is inferred that the presence of lower defects in erGO and higher C–C sp2 domains facilitate enhanced Mg–C interaction during the H uptake/release.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call