NDLI: Aerosol spray pyrolysis synthesis of water-splitting ferrites for solar hydrogen production

Content Provider	Springer Nature Link
Author	Lorentzou, Souzana Agrafiotis, Christos C. Konstandopoulos, Athanasios G.
Copyright Year	2007
Abstract	Aerosol spray pyrolysis (ASP) was employed for the synthesis of oxygen-deficient doped ferrite systems to be used as redox materials for the production of solar Hydrogen from water via a two-step thermochemical water-splitting cycle. In the first step (water splitting) the reduced state of a metal oxide is oxidized by taking oxygen from water and producing hydrogen; in the second step (regeneration) it is reduced again by delivering some of its lattice oxygen. Redox materials of the iron spinel family doped with other bivalent metals (Zn, Ni, Mn) were synthesized via ASP, characterized and evaluated with respect to their water-splitting activity. Organic additives, like citric acid, in the precursor solutions were found to result in products with finer particle size and to enhance the water-splitting activity of the synthesized materials. Material performance (water splitting activity, hydrogen yield, regeneration capability) was found to depend on the dopants’ kind and stoichiometry; in particular high percentages of Zn dopant seem to enhance the overall materials’ performance. ASP synthesized materials have demonstrated higher water conversion and hydrogen yields than materials of the same composition synthesized through solid-state routes. The ASP synthesis process was scaled-up successfully maintaining the favorable characteristics of the synthesized materials.
Starting Page	113
Ending Page	122
Page Count	10
File Format	PDF
ISSN	14345021
Journal	Granular Matter
Volume Number	10
Issue Number	2
e-ISSN	14347636
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-11-15
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ferrites Aerosol spray pyrolysis Water splitting Hydrogen production Redox materials Engineering Thermodynamics, Transport Phenomena Industrial Chemistry/Chemical Engineering Structural Foundations, Hydraulic Engineering Engineering Fluid Dynamics Granular Media
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Mechanics of Materials Materials Science

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