A nano-modified Si/TiO2 composite electrode for efficient solar water splitting

Susumu Takabayashi; Ryuhei Nakamura; Yoshihiro Nakato

doi:10.1016/j.jphotochem.2004.04.037

A nano-modified Si/TiO₂ composite electrode for efficient solar water splitting

Susumu Takabayashi, Ryuhei Nakamura, Yoshihiro Nakato

Research Institute of Electrical Communication (RIEC)

Research output: Contribution to journal › Article › peer-review

92 Citations (Scopus)

Abstract

Solar water splitting with a composite polycrystalline-Si/doped TiO₂ thin-film electrode is proposed as a promising new approach to high-efficiency and low-cost solar-to-chemical conversion. The advantage, efficiency, stability, and some problems to be solved are reviewed mainly on the basis of reported results. It is shown that (1) an n-Si electrode with surface alkylation and metal nano-dot coating gives an efficient and stable photovoltaic characteristic, (2) TiO₂ (and similar metal oxides) doped with other elements, such as nitrogen and sulfur, can cause water photooxidation (oxygen photoevolution) by visible-light illumination, and thus (3) a coupling of these two electrodes is effective for efficient water splitting under solar illumination.

Original language	English
Pages (from-to)	107-113
Number of pages	7
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	166
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jphotochem.2004.04.037
Publication status	Published - 2004 Aug 12

Keywords

Hydrogen
Nano-particles
Photocatalysis
Photoelectrochemistry
Surface modification
Thin film

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Physics and Astronomy(all)

UN SDGs

This output contributes to the following Sustainable Development Goal(s)

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10.1016/j.jphotochem.2004.04.037

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title = "A nano-modified Si/TiO2 composite electrode for efficient solar water splitting",

abstract = "Solar water splitting with a composite polycrystalline-Si/doped TiO2 thin-film electrode is proposed as a promising new approach to high-efficiency and low-cost solar-to-chemical conversion. The advantage, efficiency, stability, and some problems to be solved are reviewed mainly on the basis of reported results. It is shown that (1) an n-Si electrode with surface alkylation and metal nano-dot coating gives an efficient and stable photovoltaic characteristic, (2) TiO2 (and similar metal oxides) doped with other elements, such as nitrogen and sulfur, can cause water photooxidation (oxygen photoevolution) by visible-light illumination, and thus (3) a coupling of these two electrodes is effective for efficient water splitting under solar illumination.",

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author = "Susumu Takabayashi and Ryuhei Nakamura and Yoshihiro Nakato",

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AU - Takabayashi, Susumu

AU - Nakamura, Ryuhei

AU - Nakato, Yoshihiro

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Y1 - 2004/8/12

N2 - Solar water splitting with a composite polycrystalline-Si/doped TiO2 thin-film electrode is proposed as a promising new approach to high-efficiency and low-cost solar-to-chemical conversion. The advantage, efficiency, stability, and some problems to be solved are reviewed mainly on the basis of reported results. It is shown that (1) an n-Si electrode with surface alkylation and metal nano-dot coating gives an efficient and stable photovoltaic characteristic, (2) TiO2 (and similar metal oxides) doped with other elements, such as nitrogen and sulfur, can cause water photooxidation (oxygen photoevolution) by visible-light illumination, and thus (3) a coupling of these two electrodes is effective for efficient water splitting under solar illumination.

AB - Solar water splitting with a composite polycrystalline-Si/doped TiO2 thin-film electrode is proposed as a promising new approach to high-efficiency and low-cost solar-to-chemical conversion. The advantage, efficiency, stability, and some problems to be solved are reviewed mainly on the basis of reported results. It is shown that (1) an n-Si electrode with surface alkylation and metal nano-dot coating gives an efficient and stable photovoltaic characteristic, (2) TiO2 (and similar metal oxides) doped with other elements, such as nitrogen and sulfur, can cause water photooxidation (oxygen photoevolution) by visible-light illumination, and thus (3) a coupling of these two electrodes is effective for efficient water splitting under solar illumination.

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