Abstract
As hydrogen is an alternative to fossil fuels that are hazardous to the environment, this study explores the application of Pr0.7Sr0.3MnO3/PrMn2O5/Fe3O4/graphene oxide (GO) as a potentially effective nanocomposite for the storage of hydrogen. As a means of evaluating the contribution of each component, this nanocomposite was prepared in several stages. Various analyses were conducted to study the effects of Sr, Fe3O4 and GO. According to the results, Sr is responsible for increasing the amount of charge carriers that are capable of storing hydrogen. The Sr amount was therefore optimized by altering the calcination temperature. At higher temperatures, there is a reduction in the amount of Sr. In addition, increases in the calcination temperature as well as the presence of Fe3O4 may result in mixed metal oxides being formed as a result of thermodynamic reactions. As a result, PrMn2O5 became one of the components of the Fe3O4-containing nanocomposites. Upon the presence of Fe3O4, Pr-manganite's magnetic property changed from paramagnetism to super-paramagnetism, and, in addition, magnetization decreased upon the presence of GO. According to electrochemical studies, the anodic peak current of the multi-component composite was 3183.37 μA whereas this was 1126.48 μA for pristine Sr-doped manganite.
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