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Influence of pH Modification on Catalytic Activities of Metal-Doped IrO(2) Nanoparticles
The effects of pH variation on the catalytic activity of IrO(2) nanoparticles (NPs) doped with Cr (an early transition metal) or Ni (a late transition metal) depending on the amount of defect structures on the NP surfaces were analyzed. It was found that both Cr@IrO(2) and Ni@IrO(2) NPs, fabricated...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6456596/ https://www.ncbi.nlm.nih.gov/pubmed/30967622 http://dx.doi.org/10.1038/s41598-019-42358-9 |
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author | Kim, Joo Yeon Lee, Hangil |
author_facet | Kim, Joo Yeon Lee, Hangil |
author_sort | Kim, Joo Yeon |
collection | PubMed |
description | The effects of pH variation on the catalytic activity of IrO(2) nanoparticles (NPs) doped with Cr (an early transition metal) or Ni (a late transition metal) depending on the amount of defect structures on the NP surfaces were analyzed. It was found that both Cr@IrO(2) and Ni@IrO(2) NPs, fabricated under basic conditions (pH = 13.5) denoted as Cr@IrO(2)-B and Ni@IrO(2)-B, respectively, were the best catalysts among the eight tested ones. Moreover, it was confirmed that variation in pH resulted in the changes in the surface area (defect structure), which were considered to be responsible for the changes in the catalytic properties of these NPs. For the oxygen evolution reaction, these NPs exhibited relatively smaller overpotential (η) values than other tested Cr@IrO(2)- and Ni@IrO(2)-containing NPs. Furthermore, methylene blue degradation analysis and OH radical formation experiments by benzoic acid showed the same trend. Thus, we confirmed that the catalytic activity of transition metals doped IrO(2) NPs fabricated under basic conditions can be improved. |
format | Online Article Text |
id | pubmed-6456596 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-64565962019-04-15 Influence of pH Modification on Catalytic Activities of Metal-Doped IrO(2) Nanoparticles Kim, Joo Yeon Lee, Hangil Sci Rep Article The effects of pH variation on the catalytic activity of IrO(2) nanoparticles (NPs) doped with Cr (an early transition metal) or Ni (a late transition metal) depending on the amount of defect structures on the NP surfaces were analyzed. It was found that both Cr@IrO(2) and Ni@IrO(2) NPs, fabricated under basic conditions (pH = 13.5) denoted as Cr@IrO(2)-B and Ni@IrO(2)-B, respectively, were the best catalysts among the eight tested ones. Moreover, it was confirmed that variation in pH resulted in the changes in the surface area (defect structure), which were considered to be responsible for the changes in the catalytic properties of these NPs. For the oxygen evolution reaction, these NPs exhibited relatively smaller overpotential (η) values than other tested Cr@IrO(2)- and Ni@IrO(2)-containing NPs. Furthermore, methylene blue degradation analysis and OH radical formation experiments by benzoic acid showed the same trend. Thus, we confirmed that the catalytic activity of transition metals doped IrO(2) NPs fabricated under basic conditions can be improved. Nature Publishing Group UK 2019-04-09 /pmc/articles/PMC6456596/ /pubmed/30967622 http://dx.doi.org/10.1038/s41598-019-42358-9 Text en © The Author(s) 2019 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/. |
spellingShingle | Article Kim, Joo Yeon Lee, Hangil Influence of pH Modification on Catalytic Activities of Metal-Doped IrO(2) Nanoparticles |
title | Influence of pH Modification on Catalytic Activities of Metal-Doped IrO(2) Nanoparticles |
title_full | Influence of pH Modification on Catalytic Activities of Metal-Doped IrO(2) Nanoparticles |
title_fullStr | Influence of pH Modification on Catalytic Activities of Metal-Doped IrO(2) Nanoparticles |
title_full_unstemmed | Influence of pH Modification on Catalytic Activities of Metal-Doped IrO(2) Nanoparticles |
title_short | Influence of pH Modification on Catalytic Activities of Metal-Doped IrO(2) Nanoparticles |
title_sort | influence of ph modification on catalytic activities of metal-doped iro(2) nanoparticles |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6456596/ https://www.ncbi.nlm.nih.gov/pubmed/30967622 http://dx.doi.org/10.1038/s41598-019-42358-9 |
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