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Study on the hydrogen production using the metal oxide (Cu-ferrite)  

Park, Chu-Sik (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Seo, In-Tai (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Kim, Jung-Min (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Lee, Sang-Ho (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Hwang, Gap-Jin (Hydrogen Energy Research Center, Korea Institute of Energy Research)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.15, no.3, 2004 , pp. 201-207 More about this Journal
Abstract
Redox characteristics of metal oxide for hydrogen production by thermochemical water-splitting were investigated. $CuFe_2O_4$ as a redox pair that had a different molar ratio of Cu and Fe were prepared by co-precipitation method. Hydrogen production consisted of water-splitting step and thermal reduction step was performed below 1200K. Redox characteristics of Cu-ferrites were studied using the thermal gravimetric analysis technique. Also, structure change of Cu-ferrite during thermal reduction was investigated using the high temperature controlled XRD. In results, oxygen release of Cu-ferrite during the thermal reduction was initiated at oxygen site combined with Cu. Consequently, oxygen release amount of Cu-ferrite was increased with increase of Cu molar ratio of Cu-ferrite. It was found that thermal reduction of Cu-ferrite was begun at $875^\circ{C}$. It was confirmed that structure of Cu-ferrite was changed to metal and cation excess metal oxide during the thermal reduction step.
Keywords
Hydrogen Production; Water-splitting; Thermochemical; Redox Pair; Metal Oxide;
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