Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/2097
Title: Significant reduction in the operating temperature of the Mn(II)/Mn(III) oxide-based thermochemical water splitting cycle brought about by the use of nanoparticles
Authors: Dey, Sunita
Rajesh, S.
Rao, C. N. R.
Keywords: Chemistry
Energy & Fuels
Materials Science
Lanthanum Manganite Perovskites
Hydrogen-Production
Fuel Production
Solar Hydrogen
Co2
2-Step
Ceria
H2O
Ferrite
H-2
Issue Date: 2016
Publisher: Royal Society of Chemistry
Citation: Dey, S.; Rajesh, S.; Rao, C. N. R., Significant reduction in the operating temperature of the Mn(II)/Mn(III) oxide-based thermochemical water splitting cycle brought about by the use of nanoparticles. Journal of Materials Chemistry A 2016, 4 (43), 16830-16833 http://dx.doi.org/10.1039/c6ta06271g
Journal of Materials Chemistry A
4
43
Abstract: Among the many efforts to devise thermochemical cycles to generate H-2 by water splitting, the Mn(II)/Mn(III) oxide based cycle operating at 850 degrees C is a significant one and involves no toxic and corrosive materials. The essential process in this cycle is the shuttling of Na+ ions in and out of Mn oxides. In an effort to bring down the temperature of this cycle, we have found that the use of Mn3O4 nanoparticles is particularly effective. Ball milling has been applied to decrease the particle size of commercial Mn3O4 to less than 500 nm. Thus the solid state reaction between Na2CO3 and Mn3O4 nanoparticles occurs at a temperature 200 degrees C lower than with bulk samples. One of the challenges of this particular cycle lies in its slow H-2 evolution. It has been possible to operate this cycle and generate H-2 at a much faster rate at 750 degrees C and even at 700 degrees C by this means. Furthermore, the step involving hydrolysis of NaMnO2 can be performed at 50 degrees C instead of 100 degrees C.
Description: Restricted Access
URI: http://hdl.handle.net/10572/2097
ISSN: 2050-7488
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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