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Bifunctional hydrous RuO(2) nanocluster electrocatalyst embedded in carbon matrix for efficient and durable operation of rechargeable zinc–air batteries
Ruthenium oxide (RuO(2)) is the best oxygen evolution reaction (OER) electrocatalyst. Herein, we demonstrated that RuO(2) can be also efficiently used as an oxygen reduction reaction (ORR) electrocatalyst, thereby serving as a bifunctional material for rechargeable Zn–air batteries. We found two for...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5540911/ https://www.ncbi.nlm.nih.gov/pubmed/28769087 http://dx.doi.org/10.1038/s41598-017-07259-9 |
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author | Park, Han-Saem Seo, Eunyong Yang, Juchan Lee, Yeongdae Kim, Byeong-Su Song, Hyun-Kon |
author_facet | Park, Han-Saem Seo, Eunyong Yang, Juchan Lee, Yeongdae Kim, Byeong-Su Song, Hyun-Kon |
author_sort | Park, Han-Saem |
collection | PubMed |
description | Ruthenium oxide (RuO(2)) is the best oxygen evolution reaction (OER) electrocatalyst. Herein, we demonstrated that RuO(2) can be also efficiently used as an oxygen reduction reaction (ORR) electrocatalyst, thereby serving as a bifunctional material for rechargeable Zn–air batteries. We found two forms of RuO(2) (i.e. hydrous and anhydrous, respectively h-RuO(2) and ah-RuO(2)) to show different ORR and OER electrocatalytic characteristics. Thus, h-RuO(2) required large ORR overpotentials, although it completed the ORR via a 4e process. In contrast, h-RuO(2) triggered the OER at lower overpotentials at the expense of showing very unstable electrocatalytic activity. To capitalize on the advantages of h-RuO(2) while improving its drawbacks, we designed a unique structure (RuO(2)@C) where h-RuO(2) nanoparticles were embedded in a carbon matrix. A double hydrophilic block copolymer-templated ruthenium precursor was transformed into RuO(2) nanoparticles upon formation of the carbon matrix via annealing. The carbon matrix allowed overcoming the limitations of h-RuO(2) by improving its poor conductivity and protecting the catalyst from dissolution during OER. The bifunctional RuO(2)@C catalyst demonstrated a very low potential gap (ΔE (OER-ORR) = ca. 1.0 V) at 20 mA cm(−2). The Zn||RuO(2)@C cell showed an excellent stability (i.e. no overpotential was observed after more than 40 h). |
format | Online Article Text |
id | pubmed-5540911 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-55409112017-08-07 Bifunctional hydrous RuO(2) nanocluster electrocatalyst embedded in carbon matrix for efficient and durable operation of rechargeable zinc–air batteries Park, Han-Saem Seo, Eunyong Yang, Juchan Lee, Yeongdae Kim, Byeong-Su Song, Hyun-Kon Sci Rep Article Ruthenium oxide (RuO(2)) is the best oxygen evolution reaction (OER) electrocatalyst. Herein, we demonstrated that RuO(2) can be also efficiently used as an oxygen reduction reaction (ORR) electrocatalyst, thereby serving as a bifunctional material for rechargeable Zn–air batteries. We found two forms of RuO(2) (i.e. hydrous and anhydrous, respectively h-RuO(2) and ah-RuO(2)) to show different ORR and OER electrocatalytic characteristics. Thus, h-RuO(2) required large ORR overpotentials, although it completed the ORR via a 4e process. In contrast, h-RuO(2) triggered the OER at lower overpotentials at the expense of showing very unstable electrocatalytic activity. To capitalize on the advantages of h-RuO(2) while improving its drawbacks, we designed a unique structure (RuO(2)@C) where h-RuO(2) nanoparticles were embedded in a carbon matrix. A double hydrophilic block copolymer-templated ruthenium precursor was transformed into RuO(2) nanoparticles upon formation of the carbon matrix via annealing. The carbon matrix allowed overcoming the limitations of h-RuO(2) by improving its poor conductivity and protecting the catalyst from dissolution during OER. The bifunctional RuO(2)@C catalyst demonstrated a very low potential gap (ΔE (OER-ORR) = ca. 1.0 V) at 20 mA cm(−2). The Zn||RuO(2)@C cell showed an excellent stability (i.e. no overpotential was observed after more than 40 h). Nature Publishing Group UK 2017-08-02 /pmc/articles/PMC5540911/ /pubmed/28769087 http://dx.doi.org/10.1038/s41598-017-07259-9 Text en © The Author(s) 2017 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 Park, Han-Saem Seo, Eunyong Yang, Juchan Lee, Yeongdae Kim, Byeong-Su Song, Hyun-Kon Bifunctional hydrous RuO(2) nanocluster electrocatalyst embedded in carbon matrix for efficient and durable operation of rechargeable zinc–air batteries |
title | Bifunctional hydrous RuO(2) nanocluster electrocatalyst embedded in carbon matrix for efficient and durable operation of rechargeable zinc–air batteries |
title_full | Bifunctional hydrous RuO(2) nanocluster electrocatalyst embedded in carbon matrix for efficient and durable operation of rechargeable zinc–air batteries |
title_fullStr | Bifunctional hydrous RuO(2) nanocluster electrocatalyst embedded in carbon matrix for efficient and durable operation of rechargeable zinc–air batteries |
title_full_unstemmed | Bifunctional hydrous RuO(2) nanocluster electrocatalyst embedded in carbon matrix for efficient and durable operation of rechargeable zinc–air batteries |
title_short | Bifunctional hydrous RuO(2) nanocluster electrocatalyst embedded in carbon matrix for efficient and durable operation of rechargeable zinc–air batteries |
title_sort | bifunctional hydrous ruo(2) nanocluster electrocatalyst embedded in carbon matrix for efficient and durable operation of rechargeable zinc–air batteries |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5540911/ https://www.ncbi.nlm.nih.gov/pubmed/28769087 http://dx.doi.org/10.1038/s41598-017-07259-9 |
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