Surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven Z-scheme for overall water splitting
Abstract
While dye-sensitized metal oxides are good candidates as H2evolution photocatalysts for solar-driven Z-scheme water splitting, their solar-to-hydrogen (STH) energy conversion efficiencies remain low because of uncontrolled charge recombination reactions. Here, we show that modification of Ru dye–sensitized, Pt-intercalated HCa2Nb3O10nanosheets (Ru/Pt/HCa2Nb3O10) with both amorphous Al2O3and poly(styrenesulfonate) (PSS) improves the STH efficiency of Z-scheme overall water splitting by a factor of ~100, when the nanosheets are used in combination with a WO3-based O2evolution photocatalyst and an I3-/I-redox mediator, relative to an analogous system that uses unmodified Ru/Pt/HCa2Nb3O10. By using the optimized photocatalyst, PSS/Ru/Al2O3/Pt/HCa2Nb3O10, a maximum STH of 0.12% and an apparent quantum yield of 4.1% at 420 nm were obtained, by far the highest among dye-sensitized water splitting systems and comparable to conventional semiconductor-based suspended particulate photocatalyst systems.
- Authors:
-
[1];
[1];
[2];
[3];
[1];
[3];
[4];
[1]
- Tokyo Institute of Technology (Japan)
- Univ. of Pennsylvania, Philadelphia, PA (United States)
- National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)
- Univ. of Pennsylvania, Philadelphia, PA (United States); National Institute for Materials Science (NIMS), Tsukuba (Japan)
- Publication Date:
- Research Org.:
- Univ. of Pennsylvania, Philadelphia, PA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); Japan Society for the Promotion of Science (JSPS)
- OSTI Identifier:
- 1904316
- Grant/Contract Number:
- SC0019781; JP19H02511; JP22H01862; JP22H05148; JP21K20555
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Science Advances
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 32; Journal ID: ISSN 2375-2548
- Publisher:
- AAAS
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Science & Technology
Citation Formats
Nishioka, Shunta, Hojo, Koya, Xiao, Langqiu, Gao, Tianyue, Miseki, Yugo, Yasuda, Shuhei, Yokoi, Toshiyuki, Sayama, Kazuhiro, Mallouk, Thomas E., and Maeda, Kazuhiko. Surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven Z-scheme for overall water splitting. United States: N. p., 2022.
Web. doi:10.1126/sciadv.adc9115.
Nishioka, Shunta, Hojo, Koya, Xiao, Langqiu, Gao, Tianyue, Miseki, Yugo, Yasuda, Shuhei, Yokoi, Toshiyuki, Sayama, Kazuhiro, Mallouk, Thomas E., & Maeda, Kazuhiko. Surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven Z-scheme for overall water splitting. United States. https://doi.org/10.1126/sciadv.adc9115
Nishioka, Shunta, Hojo, Koya, Xiao, Langqiu, Gao, Tianyue, Miseki, Yugo, Yasuda, Shuhei, Yokoi, Toshiyuki, Sayama, Kazuhiro, Mallouk, Thomas E., and Maeda, Kazuhiko. Wed .
"Surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven Z-scheme for overall water splitting". United States. https://doi.org/10.1126/sciadv.adc9115. https://www.osti.gov/servlets/purl/1904316.
@article{osti_1904316,
title = {Surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven Z-scheme for overall water splitting},
author = {Nishioka, Shunta and Hojo, Koya and Xiao, Langqiu and Gao, Tianyue and Miseki, Yugo and Yasuda, Shuhei and Yokoi, Toshiyuki and Sayama, Kazuhiro and Mallouk, Thomas E. and Maeda, Kazuhiko},
abstractNote = {While dye-sensitized metal oxides are good candidates as H2evolution photocatalysts for solar-driven Z-scheme water splitting, their solar-to-hydrogen (STH) energy conversion efficiencies remain low because of uncontrolled charge recombination reactions. Here, we show that modification of Ru dye–sensitized, Pt-intercalated HCa2Nb3O10nanosheets (Ru/Pt/HCa2Nb3O10) with both amorphous Al2O3and poly(styrenesulfonate) (PSS) improves the STH efficiency of Z-scheme overall water splitting by a factor of ~100, when the nanosheets are used in combination with a WO3-based O2evolution photocatalyst and an I3-/I-redox mediator, relative to an analogous system that uses unmodified Ru/Pt/HCa2Nb3O10. By using the optimized photocatalyst, PSS/Ru/Al2O3/Pt/HCa2Nb3O10, a maximum STH of 0.12% and an apparent quantum yield of 4.1% at 420 nm were obtained, by far the highest among dye-sensitized water splitting systems and comparable to conventional semiconductor-based suspended particulate photocatalyst systems.},
doi = {10.1126/sciadv.adc9115},
journal = {Science Advances},
number = 32,
volume = 8,
place = {United States},
year = {Wed Aug 10 00:00:00 EDT 2022},
month = {Wed Aug 10 00:00:00 EDT 2022}
}
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