한국태양에너지학회 논문집 (Journal of the Korean Solar Energy Society)

  • 제23권4호
  • /
  • Pages.29-35
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  • 2003
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  • 1598-6411(pISSN)
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  • 2508-3562(eISSN)
한국태양에너지학회 (The Korean Solar Energy Society)
권호 표지

광합성을 모사한 광촉매 물분해 수소 제조

The photocatalytic water splitting into $H_2$ and $O_2$ mimicking a Z-scheme mechanism

  • Jeon, Myung-Seok (Energy Conversion & Storage Research Center, Korea Institute of Energy Research) ;
  • Hong, Joon-Gi (Department of Chemical Engineering Chungnam National University) ;
  • Chun, Young-Gab (Energy Conversion & Storage Research Center, Korea Institute of Energy Research) ;
  • Choi, Ho-Suk (Department of Chemical Engineering Chungnam National University)
  • 발행 : 2003.12.30
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초록

We studied the water splitting into $H_2$ and $O_2$ using two different semiconductor photo catalysts and redox mediator, mimicking the Z-scheme mechanism of the photosynthesis, $H_2$ evolution took place on a Pt-$SrTiO_2$ (Cr-Ta doped) photocatalyst using $I^-$ electron donor under the visible light irradiation. The Pt-$WO_3$ photocatalyst showed an excellent activity of the $O_2$ evolution using $IO_3^-$ electron acceptor under visible light. $H_2$ and $O_2$ gases evolved in the stoichiometric ratio($H_2/O_2$=2) under visible light using a mixture of the Pt-$WO_3$ and Pt-$SrTiO_3$ (Cr-Ta doped) suspended in NaI aqueous solution. We proposed a two-step photo-excitation mechanism using redox mediator under the visible irradiation.

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참고문헌

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