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Low-temperature synthesis and investigation into the formation mechanism of high quality Ni-Fe layered double hydroxides hexagonal platelets

This paper describes the wet-chemistry synthesis of highly crystalline hexagonal flakes of Ni-Fe layered double hydroxide (LDH) produced at temperature as low as 100 °C. The flakes with diameter in the range of 0.5–1.5 μm and the thickness between 15 and 20 nm were obtained by homogeneous precipitat...

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Autores principales: Jaśkaniec, Sonia, Hobbs, Christopher, Seral-Ascaso, Andrés, Coelho, João, Browne, Michelle P., Tyndall, Daire, Sasaki, Takayoshi, Nicolosi, Valeria
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5843585/
https://www.ncbi.nlm.nih.gov/pubmed/29520108
http://dx.doi.org/10.1038/s41598-018-22630-0
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author Jaśkaniec, Sonia
Hobbs, Christopher
Seral-Ascaso, Andrés
Coelho, João
Browne, Michelle P.
Tyndall, Daire
Sasaki, Takayoshi
Nicolosi, Valeria
author_facet Jaśkaniec, Sonia
Hobbs, Christopher
Seral-Ascaso, Andrés
Coelho, João
Browne, Michelle P.
Tyndall, Daire
Sasaki, Takayoshi
Nicolosi, Valeria
author_sort Jaśkaniec, Sonia
collection PubMed
description This paper describes the wet-chemistry synthesis of highly crystalline hexagonal flakes of Ni-Fe layered double hydroxide (LDH) produced at temperature as low as 100 °C. The flakes with diameter in the range of 0.5–1.5 μm and the thickness between 15 and 20 nm were obtained by homogeneous precipitation method with the use of triethanolamine (TEA) and urea. By analyzing the intermediate products, it is suggested that, differently from previous reports, a thermodynamically metastable iron oxyhydroxide and Ni-TEA complex are firstly formed at room temperature. Subsequently, when the mixture is heated to 100 °C and the pH increases due to the thermal decomposition of urea, Ni(2+) and Fe(3+) are slowly released and then recombine, thus leading to formation of pure, highly-crystalline Ni-Fe LDH flakes. This material showed promising results as an electrocatalyst in oxygen evolution reaction (OER) providing an overpotential value of 0.36 V.
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spelling pubmed-58435852018-03-14 Low-temperature synthesis and investigation into the formation mechanism of high quality Ni-Fe layered double hydroxides hexagonal platelets Jaśkaniec, Sonia Hobbs, Christopher Seral-Ascaso, Andrés Coelho, João Browne, Michelle P. Tyndall, Daire Sasaki, Takayoshi Nicolosi, Valeria Sci Rep Article This paper describes the wet-chemistry synthesis of highly crystalline hexagonal flakes of Ni-Fe layered double hydroxide (LDH) produced at temperature as low as 100 °C. The flakes with diameter in the range of 0.5–1.5 μm and the thickness between 15 and 20 nm were obtained by homogeneous precipitation method with the use of triethanolamine (TEA) and urea. By analyzing the intermediate products, it is suggested that, differently from previous reports, a thermodynamically metastable iron oxyhydroxide and Ni-TEA complex are firstly formed at room temperature. Subsequently, when the mixture is heated to 100 °C and the pH increases due to the thermal decomposition of urea, Ni(2+) and Fe(3+) are slowly released and then recombine, thus leading to formation of pure, highly-crystalline Ni-Fe LDH flakes. This material showed promising results as an electrocatalyst in oxygen evolution reaction (OER) providing an overpotential value of 0.36 V. Nature Publishing Group UK 2018-03-08 /pmc/articles/PMC5843585/ /pubmed/29520108 http://dx.doi.org/10.1038/s41598-018-22630-0 Text en © The Author(s) 2018 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
Jaśkaniec, Sonia
Hobbs, Christopher
Seral-Ascaso, Andrés
Coelho, João
Browne, Michelle P.
Tyndall, Daire
Sasaki, Takayoshi
Nicolosi, Valeria
Low-temperature synthesis and investigation into the formation mechanism of high quality Ni-Fe layered double hydroxides hexagonal platelets
title Low-temperature synthesis and investigation into the formation mechanism of high quality Ni-Fe layered double hydroxides hexagonal platelets
title_full Low-temperature synthesis and investigation into the formation mechanism of high quality Ni-Fe layered double hydroxides hexagonal platelets
title_fullStr Low-temperature synthesis and investigation into the formation mechanism of high quality Ni-Fe layered double hydroxides hexagonal platelets
title_full_unstemmed Low-temperature synthesis and investigation into the formation mechanism of high quality Ni-Fe layered double hydroxides hexagonal platelets
title_short Low-temperature synthesis and investigation into the formation mechanism of high quality Ni-Fe layered double hydroxides hexagonal platelets
title_sort low-temperature synthesis and investigation into the formation mechanism of high quality ni-fe layered double hydroxides hexagonal platelets
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5843585/
https://www.ncbi.nlm.nih.gov/pubmed/29520108
http://dx.doi.org/10.1038/s41598-018-22630-0
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