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Synthesis of 2D cobalt oxide nanosheets using a room temperature liquid metal

Room temperature liquid metals based on Ga can be used as a synthesis medium for the creation of metal oxide nanomaterials, however one thermodynamic limitation is that metals that are more easily oxidised than Ga are required to ensure their preferential formation. In this work we demonstrate a pro...

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Detalles Bibliográficos
Autores principales: Crawford, Jessica, Cowman, Aidan, O'Mullane, Anthony P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9055942/
https://www.ncbi.nlm.nih.gov/pubmed/35521128
http://dx.doi.org/10.1039/d0ra06010k
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author Crawford, Jessica
Cowman, Aidan
O'Mullane, Anthony P.
author_facet Crawford, Jessica
Cowman, Aidan
O'Mullane, Anthony P.
author_sort Crawford, Jessica
collection PubMed
description Room temperature liquid metals based on Ga can be used as a synthesis medium for the creation of metal oxide nanomaterials, however one thermodynamic limitation is that metals that are more easily oxidised than Ga are required to ensure their preferential formation. In this work we demonstrate a proof of principle approach whereby exposing the liquid metal alloyed with the required metal to acidic conditions circumvents preferential formation of Ga(2)O(3) and allows for the formation of the required 2D transition metal oxide nanosheets. The synthesis procedure is straightforward in that it only requires bubbling oxygen gas through the liquid metal alloy into a solution of 10 mM HCl. We show that the formation of thin nanosheets of ca. 1 nm in thickness of CoO is possible. The material is characterised using transmission electron microscopy, atomic force microscopy, X-ray photoelectron and Raman spectroscopy. The electrocatalytic activity of the CoO nanosheets was investigated for the oxygen evolution reaction where the nanosheet thickness was found to be a factor influencing the activity. This proof of principle offers a route to the possible formation of many other 2D transition metal oxides from metals that are less readily oxidised than Ga by taking advantage of the interesting properties of room temperature liquid metals.
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spelling pubmed-90559422022-05-04 Synthesis of 2D cobalt oxide nanosheets using a room temperature liquid metal Crawford, Jessica Cowman, Aidan O'Mullane, Anthony P. RSC Adv Chemistry Room temperature liquid metals based on Ga can be used as a synthesis medium for the creation of metal oxide nanomaterials, however one thermodynamic limitation is that metals that are more easily oxidised than Ga are required to ensure their preferential formation. In this work we demonstrate a proof of principle approach whereby exposing the liquid metal alloyed with the required metal to acidic conditions circumvents preferential formation of Ga(2)O(3) and allows for the formation of the required 2D transition metal oxide nanosheets. The synthesis procedure is straightforward in that it only requires bubbling oxygen gas through the liquid metal alloy into a solution of 10 mM HCl. We show that the formation of thin nanosheets of ca. 1 nm in thickness of CoO is possible. The material is characterised using transmission electron microscopy, atomic force microscopy, X-ray photoelectron and Raman spectroscopy. The electrocatalytic activity of the CoO nanosheets was investigated for the oxygen evolution reaction where the nanosheet thickness was found to be a factor influencing the activity. This proof of principle offers a route to the possible formation of many other 2D transition metal oxides from metals that are less readily oxidised than Ga by taking advantage of the interesting properties of room temperature liquid metals. The Royal Society of Chemistry 2020-08-11 /pmc/articles/PMC9055942/ /pubmed/35521128 http://dx.doi.org/10.1039/d0ra06010k Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Crawford, Jessica
Cowman, Aidan
O'Mullane, Anthony P.
Synthesis of 2D cobalt oxide nanosheets using a room temperature liquid metal
title Synthesis of 2D cobalt oxide nanosheets using a room temperature liquid metal
title_full Synthesis of 2D cobalt oxide nanosheets using a room temperature liquid metal
title_fullStr Synthesis of 2D cobalt oxide nanosheets using a room temperature liquid metal
title_full_unstemmed Synthesis of 2D cobalt oxide nanosheets using a room temperature liquid metal
title_short Synthesis of 2D cobalt oxide nanosheets using a room temperature liquid metal
title_sort synthesis of 2d cobalt oxide nanosheets using a room temperature liquid metal
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9055942/
https://www.ncbi.nlm.nih.gov/pubmed/35521128
http://dx.doi.org/10.1039/d0ra06010k
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