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Enhanced Oxygen Evolution Reaction Activity in Hematite Photoanodes: Effect of Sb-Li Co-Doping
[Image: see text] Co-doping represents a valid approach to maximize the performance of photocatalytic and photoelectrocatalytic semiconductors. Albeit theoretical predictions in hematite suggesting a bulk n-type doping and a surface p-type doping would deliver best results, hematite co-doping with c...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9850461/ https://www.ncbi.nlm.nih.gov/pubmed/36687027 http://dx.doi.org/10.1021/acsomega.2c05241 |
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author | Rudatis, Paolo Hrubesch, Jakob Kremshuber, Stefan Apaydin, Dogukan H. Eder, Dominik |
author_facet | Rudatis, Paolo Hrubesch, Jakob Kremshuber, Stefan Apaydin, Dogukan H. Eder, Dominik |
author_sort | Rudatis, Paolo |
collection | PubMed |
description | [Image: see text] Co-doping represents a valid approach to maximize the performance of photocatalytic and photoelectrocatalytic semiconductors. Albeit theoretical predictions in hematite suggesting a bulk n-type doping and a surface p-type doping would deliver best results, hematite co-doping with coupled cations possessing low and high oxidation states has shown promising results. Herein, we report, for the first time, Sb and Li co-doping of hematite photoanodes. Particularly, this is also a seminal work for the introduction of the highly reactive Sb(5+) directly into the hematite thin films. Upon co-doping, we have a synergistic effect on the current densities with a 67-fold improvement over the standard. Via a combined investigation with profuse photoelectrochemical measurements, X-ray diffraction, X-ray photoelectron spectroscopy, and Raman analyses, we confirm the two doping roles of Sb(5+) and Li(+) as the substitutional and interstitial dopant, respectively. The improvements are attributed to a higher charge carrier concentration along with a lower charge transfer resistance at the surface. |
format | Online Article Text |
id | pubmed-9850461 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-98504612023-01-20 Enhanced Oxygen Evolution Reaction Activity in Hematite Photoanodes: Effect of Sb-Li Co-Doping Rudatis, Paolo Hrubesch, Jakob Kremshuber, Stefan Apaydin, Dogukan H. Eder, Dominik ACS Omega [Image: see text] Co-doping represents a valid approach to maximize the performance of photocatalytic and photoelectrocatalytic semiconductors. Albeit theoretical predictions in hematite suggesting a bulk n-type doping and a surface p-type doping would deliver best results, hematite co-doping with coupled cations possessing low and high oxidation states has shown promising results. Herein, we report, for the first time, Sb and Li co-doping of hematite photoanodes. Particularly, this is also a seminal work for the introduction of the highly reactive Sb(5+) directly into the hematite thin films. Upon co-doping, we have a synergistic effect on the current densities with a 67-fold improvement over the standard. Via a combined investigation with profuse photoelectrochemical measurements, X-ray diffraction, X-ray photoelectron spectroscopy, and Raman analyses, we confirm the two doping roles of Sb(5+) and Li(+) as the substitutional and interstitial dopant, respectively. The improvements are attributed to a higher charge carrier concentration along with a lower charge transfer resistance at the surface. American Chemical Society 2023-01-04 /pmc/articles/PMC9850461/ /pubmed/36687027 http://dx.doi.org/10.1021/acsomega.2c05241 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Rudatis, Paolo Hrubesch, Jakob Kremshuber, Stefan Apaydin, Dogukan H. Eder, Dominik Enhanced Oxygen Evolution Reaction Activity in Hematite Photoanodes: Effect of Sb-Li Co-Doping |
title | Enhanced Oxygen
Evolution Reaction Activity in Hematite
Photoanodes: Effect of Sb-Li Co-Doping |
title_full | Enhanced Oxygen
Evolution Reaction Activity in Hematite
Photoanodes: Effect of Sb-Li Co-Doping |
title_fullStr | Enhanced Oxygen
Evolution Reaction Activity in Hematite
Photoanodes: Effect of Sb-Li Co-Doping |
title_full_unstemmed | Enhanced Oxygen
Evolution Reaction Activity in Hematite
Photoanodes: Effect of Sb-Li Co-Doping |
title_short | Enhanced Oxygen
Evolution Reaction Activity in Hematite
Photoanodes: Effect of Sb-Li Co-Doping |
title_sort | enhanced oxygen
evolution reaction activity in hematite
photoanodes: effect of sb-li co-doping |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9850461/ https://www.ncbi.nlm.nih.gov/pubmed/36687027 http://dx.doi.org/10.1021/acsomega.2c05241 |
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