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Thermal Behavior of NiFe2O4 for Hydrogen Generation  

Han, S.B. (Department of Chemistry, Sangmyung Univ.)
Kang, T.B. (Department of Chemistry, Sangmyung Univ.)
Joo, O.S. (Eco-nano Research Center, Korea Institute Science and Technology)
Jung, K.D. (Eco-nano Research Center, Korea Institute Science and Technology)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.14, no.4, 2003 , pp. 298-304 More about this Journal
Abstract
The thermal behavior of $NiFe_2O_4$ prepared by a solid-state reaction was investigated for $H_2$ generation by the thermochemical cycle. The reduction of $NiFe_2O_4$ started from $800^{\circ}C$, and the weight loss was 0.2-0.3 wt% up to $1000^{\circ}C$. In the $H_2O$ decomposition reaction, $H_2$ was generated by oxidation of reduced $NiFe_2O_4$. The crystal structure of $NiFe_2O_4$ maintained during the redox reaction of 5 cycles. From this observation, the lattice oxygen in $NiFe_2O_4$ is released without the structural change during the thermal reduction and oxygen deficient $NiFe_2O_4$ can be restored to the spinel structure of $NiFe_2O_4$.
Keywords
Thermochemical cycle; Ferrite; Thermal behavior; Hydrogen production; Redox;
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Times Cited By KSCI : 2  (Citation Analysis)
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