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Single-atomic-site platinum steers photogenerated charge carrier lifetime of hematite nanoflakes for photoelectrochemical water splitting

Although much effort has been devoted to improving photoelectrochemical water splitting of hematite (α-Fe(2)O(3)) due to its high theoretical solar-to-hydrogen conversion efficiency of 15.5%, the low applied bias photon-to-current efficiency remains a huge challenge for practical applications. Herei...

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Autores principales: Gao, Rui-Ting, Zhang, Jiangwei, Nakajima, Tomohiko, He, Jinlu, Liu, Xianhu, Zhang, Xueyuan, Wang, Lei, Wu, Limin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10167323/
https://www.ncbi.nlm.nih.gov/pubmed/37156781
http://dx.doi.org/10.1038/s41467-023-38343-6
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author Gao, Rui-Ting
Zhang, Jiangwei
Nakajima, Tomohiko
He, Jinlu
Liu, Xianhu
Zhang, Xueyuan
Wang, Lei
Wu, Limin
author_facet Gao, Rui-Ting
Zhang, Jiangwei
Nakajima, Tomohiko
He, Jinlu
Liu, Xianhu
Zhang, Xueyuan
Wang, Lei
Wu, Limin
author_sort Gao, Rui-Ting
collection PubMed
description Although much effort has been devoted to improving photoelectrochemical water splitting of hematite (α-Fe(2)O(3)) due to its high theoretical solar-to-hydrogen conversion efficiency of 15.5%, the low applied bias photon-to-current efficiency remains a huge challenge for practical applications. Herein, we introduce single platinum atom sites coordination with oxygen atom (Pt-O/Pt-O-Fe) sites into single crystalline α-Fe(2)O(3) nanoflakes photoanodes (SAs Pt:Fe(2)O(3)-Ov). The single-atom Pt doping of α-Fe(2)O(3) can induce few electron trapping sites, enhance carrier separation capability, and boost charge transfer lifetime in the bulk structure as well as improve charge carrier injection efficiency at the semiconductor/electrolyte interface. Further introduction of surface oxygen vacancies can suppress charge carrier recombination and promote surface reaction kinetics, especially at low potential. Accordingly, the optimum SAs Pt:Fe(2)O(3)-Ov photoanode exhibits the photoelectrochemical performance of 3.65 and 5.30 mA cm(−2) at 1.23 and 1.5 V(RHE), respectively, with an applied bias photon-to-current efficiency of 0.68% for the hematite-based photoanodes. This study opens an avenue for designing highly efficient atomic-level engineering on single crystalline semiconductors for feasible photoelectrochemical applications.
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spelling pubmed-101673232023-05-10 Single-atomic-site platinum steers photogenerated charge carrier lifetime of hematite nanoflakes for photoelectrochemical water splitting Gao, Rui-Ting Zhang, Jiangwei Nakajima, Tomohiko He, Jinlu Liu, Xianhu Zhang, Xueyuan Wang, Lei Wu, Limin Nat Commun Article Although much effort has been devoted to improving photoelectrochemical water splitting of hematite (α-Fe(2)O(3)) due to its high theoretical solar-to-hydrogen conversion efficiency of 15.5%, the low applied bias photon-to-current efficiency remains a huge challenge for practical applications. Herein, we introduce single platinum atom sites coordination with oxygen atom (Pt-O/Pt-O-Fe) sites into single crystalline α-Fe(2)O(3) nanoflakes photoanodes (SAs Pt:Fe(2)O(3)-Ov). The single-atom Pt doping of α-Fe(2)O(3) can induce few electron trapping sites, enhance carrier separation capability, and boost charge transfer lifetime in the bulk structure as well as improve charge carrier injection efficiency at the semiconductor/electrolyte interface. Further introduction of surface oxygen vacancies can suppress charge carrier recombination and promote surface reaction kinetics, especially at low potential. Accordingly, the optimum SAs Pt:Fe(2)O(3)-Ov photoanode exhibits the photoelectrochemical performance of 3.65 and 5.30 mA cm(−2) at 1.23 and 1.5 V(RHE), respectively, with an applied bias photon-to-current efficiency of 0.68% for the hematite-based photoanodes. This study opens an avenue for designing highly efficient atomic-level engineering on single crystalline semiconductors for feasible photoelectrochemical applications. Nature Publishing Group UK 2023-05-08 /pmc/articles/PMC10167323/ /pubmed/37156781 http://dx.doi.org/10.1038/s41467-023-38343-6 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Gao, Rui-Ting
Zhang, Jiangwei
Nakajima, Tomohiko
He, Jinlu
Liu, Xianhu
Zhang, Xueyuan
Wang, Lei
Wu, Limin
Single-atomic-site platinum steers photogenerated charge carrier lifetime of hematite nanoflakes for photoelectrochemical water splitting
title Single-atomic-site platinum steers photogenerated charge carrier lifetime of hematite nanoflakes for photoelectrochemical water splitting
title_full Single-atomic-site platinum steers photogenerated charge carrier lifetime of hematite nanoflakes for photoelectrochemical water splitting
title_fullStr Single-atomic-site platinum steers photogenerated charge carrier lifetime of hematite nanoflakes for photoelectrochemical water splitting
title_full_unstemmed Single-atomic-site platinum steers photogenerated charge carrier lifetime of hematite nanoflakes for photoelectrochemical water splitting
title_short Single-atomic-site platinum steers photogenerated charge carrier lifetime of hematite nanoflakes for photoelectrochemical water splitting
title_sort single-atomic-site platinum steers photogenerated charge carrier lifetime of hematite nanoflakes for photoelectrochemical water splitting
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10167323/
https://www.ncbi.nlm.nih.gov/pubmed/37156781
http://dx.doi.org/10.1038/s41467-023-38343-6
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