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Investigation of Photocatalytic Activity with a Metal Doped TiO2 Nanotubular Electrode for Hydrogen Production

금속담지 된 수소제조용 TiO2 나노튜브 전극의 광활성 연구

  • Lee, Jae-Min (Dept. of Chemical and Biomolecular. Engr., Yonsei Univ.) ;
  • Lee, Chang-Ha (Dept. of Chemical and Biomolecular. Engr., Yonsei Univ.) ;
  • Yoon, Jae-Kyung (Hydrogen Energy Research Center, Korea Institute of Energy Research) ;
  • Joo, Hyun-Ku (Hydrogen Energy Research Center, Korea Institute of Energy Research)
  • 이재민 (연세대학교 화공생명공학과) ;
  • 이창하 (연세대학교 화공생명공학과) ;
  • 윤재경 (한국에너지기술연구원 수소에너지센터) ;
  • 주현규 (한국에너지기술연구원 수소에너지센터)
  • Received : 2011.09.30
  • Accepted : 2011.10.21
  • Published : 2011.10.30

Abstract

The purpose of this study was to correlate between photoelectrochemcial hydrogen production rate and electron transfer with various types of metal doped $TiO_2$ nanotubes as photoanodes. In order to fabricate light sensitized photoanode, CdS, $WO_3$, and Pt were doped by electrodeposition method. As the results of experiments, the electron transfer was favorable from higher position to lower position of conduction band (CB). In consequence, the higher hydrogen production rate was as follows, CdS/$TiO_2$ (100 $umol/hr-cm^2$) > $WO_3/TiO_2$ (20 $umol/hr-cm^2$) > Pt/$TiO_2$ (10 $umol/hr-cm^2$). The surface characterizations exhibited that crystal structure, morphological and electrical properties of various metal depoed $TiO_2$ nanotubes by the results of SEM, TEM, XPS, and photocurrent measurements.

Acknowledgement

Supported by : 교육과학기술부

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