|Title||Synthesis and characterization of nanocrystalline MnFe2O 4: Advances in thermochemical water splitting|
|Publication Type||Articolo su Rivista peer-reviewed|
|Year of Publication||2005|
|Authors||Alvani, C., Ennas G., La Barbera A., Marongiu G., Padella F., and Varsano F.|
|Journal||International Journal of Hydrogen Energy|
|Keywords||Agglomeration, Ball milling, High-energy ball milling, Hydrogen energy, Manganese compounds, Manganese ferrite, Nanostructured materials, Stoichiometric mixtures, Stoichiometry, Synthesis (chemical), Thermal effects, Thermogravimetric analysis, Transmission electron microscopy|
Nanostructured MnFe2O4 was prepared by high-energy ball milling of a stoichiometric mixture of MnO and Fe2O3 powders and characterized by XRD, TEM and TGA techniques. The ball milling process leads to strained nanocrystals with an average size of about 5 nm, agglomerated in sizes of about 100 nm. It was used with mechanically activated Na2CO3 to produce hydrogen from water in the temperature range 973-1073 K. At 1023 K the mixture shows a hydrogen production five times higher than that obtained with manganese ferrite prepared by thermally activated solid-state reaction. © 2004 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
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