Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Thermal Behavior of NiFe2O4 for Hydrogen Generation

NiFe2O4를 이용한 열화학 사이클 H2 제조

  • 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)
  • 한상범 (상명대학교 화학과) ;
  • 강태범 (상명대학교 화학과) ;
  • 주오심 (한국과학기술연구원 나노환경센터) ;
  • 정광덕 (한국과학기술연구원 나노환경센터)
  • Published : 2003.12.30
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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

Acknowledgement

Supported by : 과학기술부

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