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

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Redox reaction of Fe-based oxide mediums for hydrogen storage and release: cooperative effects of Rh, Ce and Zr additives

수소 저장 및 방출을 위한 Fe 계 산화물 매체의 환원-산화 반응: Rh, Ce 및 Zr 첨가제의 협동 효과

  • Lee, Dong-Hee (Department of Fine Chemicals Engineering & Applied Chemistry, BK21-E2M, Chungnam National University) ;
  • Park, Chu-Sik (Korea Institute of Energy Research) ;
  • Kim, Young-Ho (Department of Fine Chemicals Engineering & Applied Chemistry, BK21-E2M, Chungnam National University)
  • 이동희 (충남대학교 정밀응용화학과 BK21-에너지환경소재사업단) ;
  • 박주식 (한국 에너지기술연구원) ;
  • 김영호 (충남대학교 정밀응용화학과 BK21-에너지환경소재사업단)
  • Published : 2008.06.30
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Abstract

Cooperative effects of Rh, Ce and Zr added to Fe-based oxide mediums were investigated using temperature programmed redox reaction (TPR/TPO) and isothermal redox reaction in the view point of hydrogen storage and release. As the results of TPR/TPO, Rh was a sale additive to remarkably promote the redox reaction on the medium as evidenced by the lower highest peak temperature, even though its addition was to accelerate deactivation of the mediums due to sintering. On the other hand, Ce and Zr additives played an important role to suppress deactivation of the medium in repeated redox cycles. The medium co-added by Rh, Ce and Zr (FRCZ) exhibited synergistic performance in the repeated isothermal redox reaction, and the amount of hydrogen produced in the water splitting step at 623 K was highly maintained at ca. $17\;mmol{\cdot}g^{-1}-Fe$ during three repeated redox cycles.

Keywords

References

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