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Preparing Alumina-Supported Gold Nanowires for Alcohol Oxidation
[Image: see text] The development of shape-controlled noble metal nanocrystals such as nanowires (NWs) is progressing steadily owing to their potentially novel catalytic properties and the ease with which they can be prepared by reducing the metal ions in a particular solution as capping agents. Rec...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8223421/ https://www.ncbi.nlm.nih.gov/pubmed/34179649 http://dx.doi.org/10.1021/acsomega.1c01895 |
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author | Imura, Yoshiro Maniwa, Motoki Iida, Kazuki Saito, Haruna Morita-Imura, Clara Kawai, Takeshi |
author_facet | Imura, Yoshiro Maniwa, Motoki Iida, Kazuki Saito, Haruna Morita-Imura, Clara Kawai, Takeshi |
author_sort | Imura, Yoshiro |
collection | PubMed |
description | [Image: see text] The development of shape-controlled noble metal nanocrystals such as nanowires (NWs) is progressing steadily owing to their potentially novel catalytic properties and the ease with which they can be prepared by reducing the metal ions in a particular solution as capping agents. Recently, many reports have been presented on the preparation of shape-controlled Au nanocrystals, such as nanostars and nanoflowers, by a one-pot method using 2-[4-(2-hydroxyethyl)-1-piperazinyl] ethanesulfonic acid (HEPES) as capping and reducing agents. The catalytic activity is depressed due to the adsorption of the capping agent onto a Au surface. Since HEPES has low binding affinities on the Au surface, shape-controlled nanocrystals obtained using HEPES are effective for application as nanocatalysts because HEPES was easily removed from the Au surface. In this study, we report the preparation of AuNWs, with an average diameter of 7.7 nm and lengths of a few hundred nanometers, in an aqueous solution containing HEPES and sodium borohydride. A γ-Al(2)O(3)-supported AuNW (AuNW/γ-Al(2)O(3)) catalyst was obtained using catalytic supporters and a water extraction method that removed HEPES from the Au surface without morphological changes. AuNW/γ-Al(2)O(3) was then utilized to catalyze the oxidation of 1-phenylethyl alcohol to acetophenone. The formation rate of acetophenone over AuNW/γ-Al(2)O(3) was 3.2 times that over γ-Al(2)O(3)-supported spherical Au nanoparticles (AuNP/γ-Al(2)O(3)) with almost the same diameter. |
format | Online Article Text |
id | pubmed-8223421 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-82234212021-06-25 Preparing Alumina-Supported Gold Nanowires for Alcohol Oxidation Imura, Yoshiro Maniwa, Motoki Iida, Kazuki Saito, Haruna Morita-Imura, Clara Kawai, Takeshi ACS Omega [Image: see text] The development of shape-controlled noble metal nanocrystals such as nanowires (NWs) is progressing steadily owing to their potentially novel catalytic properties and the ease with which they can be prepared by reducing the metal ions in a particular solution as capping agents. Recently, many reports have been presented on the preparation of shape-controlled Au nanocrystals, such as nanostars and nanoflowers, by a one-pot method using 2-[4-(2-hydroxyethyl)-1-piperazinyl] ethanesulfonic acid (HEPES) as capping and reducing agents. The catalytic activity is depressed due to the adsorption of the capping agent onto a Au surface. Since HEPES has low binding affinities on the Au surface, shape-controlled nanocrystals obtained using HEPES are effective for application as nanocatalysts because HEPES was easily removed from the Au surface. In this study, we report the preparation of AuNWs, with an average diameter of 7.7 nm and lengths of a few hundred nanometers, in an aqueous solution containing HEPES and sodium borohydride. A γ-Al(2)O(3)-supported AuNW (AuNW/γ-Al(2)O(3)) catalyst was obtained using catalytic supporters and a water extraction method that removed HEPES from the Au surface without morphological changes. AuNW/γ-Al(2)O(3) was then utilized to catalyze the oxidation of 1-phenylethyl alcohol to acetophenone. The formation rate of acetophenone over AuNW/γ-Al(2)O(3) was 3.2 times that over γ-Al(2)O(3)-supported spherical Au nanoparticles (AuNP/γ-Al(2)O(3)) with almost the same diameter. American Chemical Society 2021-06-13 /pmc/articles/PMC8223421/ /pubmed/34179649 http://dx.doi.org/10.1021/acsomega.1c01895 Text en © 2021 The Authors. Published by American Chemical Society Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Imura, Yoshiro Maniwa, Motoki Iida, Kazuki Saito, Haruna Morita-Imura, Clara Kawai, Takeshi Preparing Alumina-Supported Gold Nanowires for Alcohol Oxidation |
title | Preparing Alumina-Supported Gold Nanowires for Alcohol
Oxidation |
title_full | Preparing Alumina-Supported Gold Nanowires for Alcohol
Oxidation |
title_fullStr | Preparing Alumina-Supported Gold Nanowires for Alcohol
Oxidation |
title_full_unstemmed | Preparing Alumina-Supported Gold Nanowires for Alcohol
Oxidation |
title_short | Preparing Alumina-Supported Gold Nanowires for Alcohol
Oxidation |
title_sort | preparing alumina-supported gold nanowires for alcohol
oxidation |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8223421/ https://www.ncbi.nlm.nih.gov/pubmed/34179649 http://dx.doi.org/10.1021/acsomega.1c01895 |
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