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Title: An Artificial Z-Scheme Constructed from Dye-Sensitized Metal Oxide Nanosheets for Visible Light-Driven Overall Water Splitting

Abstract

Sensitization of a wide-gap oxide semiconductor with a visible-light-absorbing dye has been studied for decades as a means of producing H2 from water. However, efficient overall water splitting using a dye-sensitized oxide photocatalyst has remained an unmet challenge. Here in this paper we demonstrate visible-light-driven overall water splitting into H2 and O2 using HCa2Nb3O10 nanosheets sensitized by a Ru(II) tris-diimine type photosensitizer, in combination with a WO3-based water oxidation photocatalyst and a triiodide/iodide redox couple. With the use of Pt-intercalated HCa2Nb3O10 nanosheets further modified with amorphous Al2O3 clusters as the H2 evolution component, the dye-based turnover number and frequency for H2 evolution reached 4580 and 1960 h–1, respectively. The apparent quantum yield for overall water splitting using 420 nm light was 2.4%, by far the highest among dye- sensitized overall water splitting systems reported to date. The present work clearly shows that a carefully designed dye/oxide hybrid has great potential for photocatalytic H2 production, and represents a significant leap forward in the development of solar-driven water splitting systems.

Authors:
 [1]; ORCiD logo [2];  [3];  [4];  [5]; ORCiD logo [6]; ORCiD logo [7];  [3]; ORCiD logo [8];  [5]; ORCiD logo [7]; ORCiD logo [4]; ORCiD logo [9]; ORCiD logo [4]
  1. Tokyo Inst. of Technology, Tokyo (Japan); Japan Society for the Promotion of Science, Tokyo (Japan)
  2. Tokyo Inst. of Technology, Tokyo (Japan); Japan Society for the Promotion of Science, Tokyo (Japan); Univ. of Pennsylvania, Philadelphia, PA (United States)
  3. Niigata Univ., Niigata (Japan)
  4. Tokyo Inst. of Technology, Tokyo (Japan)
  5. National Inst. for Materials Science, Tsukuba (Japan). Research Centre for Advanced Measurement and Characterization
  6. National Inst. for Materials Science, Tsukuba (Japan). Research Centre for Functional Materials
  7. National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan). Research Centre for Photovoltaics (RCPV)
  8. Tokyo Institute of Technology (Japan). Inst. of Innovative Research
  9. Univ. of Pennsylvania, Philadelphia, PA (United States); National Inst. for Materials Science (NIMS), Tsukuba (Japan). International Centre for Materials Nanoarchitectonics (WPI-MANA)
Publication Date:
Research Org.:
Univ. of Pennsylvania, Philadelphia, PA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1614807
Grant/Contract Number:  
SC0019781
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 142; Journal Issue: 18; Journal ID: ISSN 0002-7863
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; solar water splitting; Z-scheme; dye sensitization

Citation Formats

Oshima, Takayoshi, Nishioka, Shunta, Kikuchi, Yuka, Hirai, Shota, Yanagisawa, Kei-ichi, Eguchi, Miharu, Miseki, Yugo, Yokoi, Toshiyuki, Yui, Tatsuto, Kimoto, Koji, Sayama, Kazuhiro, Ishitani, Osamu, Mallouk, Thomas E., and Maeda, Kazuhiko. An Artificial Z-Scheme Constructed from Dye-Sensitized Metal Oxide Nanosheets for Visible Light-Driven Overall Water Splitting. United States: N. p., 2020. Web. doi:10.1021/jacs.0c02053.
Oshima, Takayoshi, Nishioka, Shunta, Kikuchi, Yuka, Hirai, Shota, Yanagisawa, Kei-ichi, Eguchi, Miharu, Miseki, Yugo, Yokoi, Toshiyuki, Yui, Tatsuto, Kimoto, Koji, Sayama, Kazuhiro, Ishitani, Osamu, Mallouk, Thomas E., & Maeda, Kazuhiko. An Artificial Z-Scheme Constructed from Dye-Sensitized Metal Oxide Nanosheets for Visible Light-Driven Overall Water Splitting. United States. https://doi.org/10.1021/jacs.0c02053
Oshima, Takayoshi, Nishioka, Shunta, Kikuchi, Yuka, Hirai, Shota, Yanagisawa, Kei-ichi, Eguchi, Miharu, Miseki, Yugo, Yokoi, Toshiyuki, Yui, Tatsuto, Kimoto, Koji, Sayama, Kazuhiro, Ishitani, Osamu, Mallouk, Thomas E., and Maeda, Kazuhiko. Mon . "An Artificial Z-Scheme Constructed from Dye-Sensitized Metal Oxide Nanosheets for Visible Light-Driven Overall Water Splitting". United States. https://doi.org/10.1021/jacs.0c02053. https://www.osti.gov/servlets/purl/1614807.
@article{osti_1614807,
title = {An Artificial Z-Scheme Constructed from Dye-Sensitized Metal Oxide Nanosheets for Visible Light-Driven Overall Water Splitting},
author = {Oshima, Takayoshi and Nishioka, Shunta and Kikuchi, Yuka and Hirai, Shota and Yanagisawa, Kei-ichi and Eguchi, Miharu and Miseki, Yugo and Yokoi, Toshiyuki and Yui, Tatsuto and Kimoto, Koji and Sayama, Kazuhiro and Ishitani, Osamu and Mallouk, Thomas E. and Maeda, Kazuhiko},
abstractNote = {Sensitization of a wide-gap oxide semiconductor with a visible-light-absorbing dye has been studied for decades as a means of producing H2 from water. However, efficient overall water splitting using a dye-sensitized oxide photocatalyst has remained an unmet challenge. Here in this paper we demonstrate visible-light-driven overall water splitting into H2 and O2 using HCa2Nb3O10 nanosheets sensitized by a Ru(II) tris-diimine type photosensitizer, in combination with a WO3-based water oxidation photocatalyst and a triiodide/iodide redox couple. With the use of Pt-intercalated HCa2Nb3O10 nanosheets further modified with amorphous Al2O3 clusters as the H2 evolution component, the dye-based turnover number and frequency for H2 evolution reached 4580 and 1960 h–1, respectively. The apparent quantum yield for overall water splitting using 420 nm light was 2.4%, by far the highest among dye- sensitized overall water splitting systems reported to date. The present work clearly shows that a carefully designed dye/oxide hybrid has great potential for photocatalytic H2 production, and represents a significant leap forward in the development of solar-driven water splitting systems.},
doi = {10.1021/jacs.0c02053},
journal = {Journal of the American Chemical Society},
number = 18,
volume = 142,
place = {United States},
year = {Mon Apr 13 00:00:00 EDT 2020},
month = {Mon Apr 13 00:00:00 EDT 2020}
}

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