Surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven Z-scheme for overall water splitting

While dye-sensitized metal oxides are good candidates as H(2) evolution 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–...

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Autores principales: Nishioka, Shunta, Hojo, Koya, Xiao, Langqiu, Gao, Tianyue, Miseki, Yugo, Yasuda, Shuhei, Yokoi, Toshiyuki, Sayama, Kazuhiro, Mallouk, Thomas E., Maeda, Kazuhiko
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2022
Materias:
Physical and Materials Sciences
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9365272/
https://www.ncbi.nlm.nih.gov/pubmed/35947708
http://dx.doi.org/10.1126/sciadv.adc9115
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author Nishioka, Shunta
Hojo, Koya
Xiao, Langqiu
Gao, Tianyue
Miseki, Yugo
Yasuda, Shuhei
Yokoi, Toshiyuki
Sayama, Kazuhiro
Mallouk, Thomas E.
Maeda, Kazuhiko
author_facet Nishioka, Shunta
Hojo, Koya
Xiao, Langqiu
Gao, Tianyue
Miseki, Yugo
Yasuda, Shuhei
Yokoi, Toshiyuki
Sayama, Kazuhiro
Mallouk, Thomas E.
Maeda, Kazuhiko
author_sort Nishioka, Shunta
collection PubMed
description While dye-sensitized metal oxides are good candidates as H(2) evolution 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 HCa(2)Nb(3)O(10) nanosheets (Ru/Pt/HCa(2)Nb(3)O(10)) with both amorphous Al(2)O(3) and 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 WO(3)-based O(2) evolution photocatalyst and an I(3)(−)/I(−) redox mediator, relative to an analogous system that uses unmodified Ru/Pt/HCa(2)Nb(3)O(10). By using the optimized photocatalyst, PSS/Ru/Al(2)O(3)/Pt/HCa(2)Nb(3)O(10), 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.
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spelling pubmed-93652722022-08-18 Surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven Z-scheme for overall water splitting Nishioka, Shunta Hojo, Koya Xiao, Langqiu Gao, Tianyue Miseki, Yugo Yasuda, Shuhei Yokoi, Toshiyuki Sayama, Kazuhiro Mallouk, Thomas E. Maeda, Kazuhiko Sci Adv Physical and Materials Sciences While dye-sensitized metal oxides are good candidates as H(2) evolution 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 HCa(2)Nb(3)O(10) nanosheets (Ru/Pt/HCa(2)Nb(3)O(10)) with both amorphous Al(2)O(3) and 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 WO(3)-based O(2) evolution photocatalyst and an I(3)(−)/I(−) redox mediator, relative to an analogous system that uses unmodified Ru/Pt/HCa(2)Nb(3)O(10). By using the optimized photocatalyst, PSS/Ru/Al(2)O(3)/Pt/HCa(2)Nb(3)O(10), 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. American Association for the Advancement of Science 2022-08-10 /pmc/articles/PMC9365272/ /pubmed/35947708 http://dx.doi.org/10.1126/sciadv.adc9115 Text en Copyright © 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Physical and Materials Sciences
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
title Surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven Z-scheme for overall water splitting
title_full Surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven Z-scheme for overall water splitting
title_fullStr Surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven Z-scheme for overall water splitting
title_full_unstemmed Surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven Z-scheme for overall water splitting
title_short Surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven Z-scheme for overall water splitting
title_sort surface-modified, dye-sensitized niobate nanosheets enabling an efficient solar-driven z-scheme for overall water splitting
topic Physical and Materials Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9365272/
https://www.ncbi.nlm.nih.gov/pubmed/35947708
http://dx.doi.org/10.1126/sciadv.adc9115
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