A New Class of Molecular-Based Photoelectrochemical Cell for Solar Hydrogen Production Consisting of Two Mesoporous TiO 2 Electrodes

Kohei Morita, Ken Sakai, Hironobu Ozawa

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

A new class of molecular-based photoelectrochemical cell for solar hydrogen production consisting of a TiO 2 -based photoanode modified with a polypyridyl ruthenium photosensitizer (Ru-qpy) and a TiO 2 -based cathode modified with a platinum porphyrin H 2 evolution catalyst has been investigated, showing that the electron accumulation at the conduction band of TiO 2 at the photoanode is promoted via electron injection from the Ru-qpy together with hole scavenging by a sacrificial donor. Our study here for the first time unveils that the upward shift given in the Fermi level of the TiO 2 at the photoanode provides an electromotive force required to flow electrical current leading to solar hydrogen production from water even without applying external electrical bias.

元の言語英語
ページ(範囲)987-992
ページ数6
ジャーナルACS Applied Energy Materials
2
発行部数2
DOI
出版物ステータス出版済み - 2 25 2019

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Photoelectrochemical cells
Hydrogen production
Electromotive force
Electrodes
Electron injection
Photosensitizing Agents
Photosensitizers
Ruthenium
Scavenging
Porphyrins
Platinum
Fermi level
Conduction bands
Cathodes
Catalysts
Electrons
Water

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Chemical Engineering (miscellaneous)
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

これを引用

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AB - A new class of molecular-based photoelectrochemical cell for solar hydrogen production consisting of a TiO 2 -based photoanode modified with a polypyridyl ruthenium photosensitizer (Ru-qpy) and a TiO 2 -based cathode modified with a platinum porphyrin H 2 evolution catalyst has been investigated, showing that the electron accumulation at the conduction band of TiO 2 at the photoanode is promoted via electron injection from the Ru-qpy together with hole scavenging by a sacrificial donor. Our study here for the first time unveils that the upward shift given in the Fermi level of the TiO 2 at the photoanode provides an electromotive force required to flow electrical current leading to solar hydrogen production from water even without applying external electrical bias.

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