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Using the Colloidal Method to Prepare Au Catalysts for the Alkylation of Aniline by Benzyl Alcohol

Using the colloidal method, attempts were made to deposit Au NPs on seven different material supports (TiO(2), α and γ-Al(2)O(3), HFeO(2), CeO(2), C, and SiO(2)). The deposition between 0.8 and 1 wt% of Au NPs can be generally achieved, apart for SiO(2) (no deposition) and α-alumina (0.3 wt%). The r...

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Autores principales: Hare, Luka V., Parveen, Firdaus, Cookson, James, Ellis, Peter R., Hellgardt, Klaus, Hii, King Kuok (Mimi)
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10573501/
https://www.ncbi.nlm.nih.gov/pubmed/37834224
http://dx.doi.org/10.3390/ijms241914779
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author Hare, Luka V.
Parveen, Firdaus
Cookson, James
Ellis, Peter R.
Hellgardt, Klaus
Hii, King Kuok (Mimi)
author_facet Hare, Luka V.
Parveen, Firdaus
Cookson, James
Ellis, Peter R.
Hellgardt, Klaus
Hii, King Kuok (Mimi)
author_sort Hare, Luka V.
collection PubMed
description Using the colloidal method, attempts were made to deposit Au NPs on seven different material supports (TiO(2), α and γ-Al(2)O(3), HFeO(2), CeO(2), C, and SiO(2)). The deposition between 0.8 and 1 wt% of Au NPs can be generally achieved, apart for SiO(2) (no deposition) and α-alumina (0.3 wt%). The resultant sizes of the Au NPs were dependent on the nature as well as the surface area of the support. The catalytic activity and selectivity of the supported Au catalysts were then compared in the alkylation of aniline by benzyl alcohol. Correlations were made between the nature of the support, the size of the Au NP, and the H-binding energy. A minimum H-binding energy of 1100 μV K(−1) was found to be necessary for high selectivity for the secondary amine. Comparisons of the TEM images of the pre- and post-reaction catalysts also revealed the extent of Au NP agglomeration under the reaction conditions.
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spelling pubmed-105735012023-10-14 Using the Colloidal Method to Prepare Au Catalysts for the Alkylation of Aniline by Benzyl Alcohol Hare, Luka V. Parveen, Firdaus Cookson, James Ellis, Peter R. Hellgardt, Klaus Hii, King Kuok (Mimi) Int J Mol Sci Article Using the colloidal method, attempts were made to deposit Au NPs on seven different material supports (TiO(2), α and γ-Al(2)O(3), HFeO(2), CeO(2), C, and SiO(2)). The deposition between 0.8 and 1 wt% of Au NPs can be generally achieved, apart for SiO(2) (no deposition) and α-alumina (0.3 wt%). The resultant sizes of the Au NPs were dependent on the nature as well as the surface area of the support. The catalytic activity and selectivity of the supported Au catalysts were then compared in the alkylation of aniline by benzyl alcohol. Correlations were made between the nature of the support, the size of the Au NP, and the H-binding energy. A minimum H-binding energy of 1100 μV K(−1) was found to be necessary for high selectivity for the secondary amine. Comparisons of the TEM images of the pre- and post-reaction catalysts also revealed the extent of Au NP agglomeration under the reaction conditions. MDPI 2023-09-30 /pmc/articles/PMC10573501/ /pubmed/37834224 http://dx.doi.org/10.3390/ijms241914779 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hare, Luka V.
Parveen, Firdaus
Cookson, James
Ellis, Peter R.
Hellgardt, Klaus
Hii, King Kuok (Mimi)
Using the Colloidal Method to Prepare Au Catalysts for the Alkylation of Aniline by Benzyl Alcohol
title Using the Colloidal Method to Prepare Au Catalysts for the Alkylation of Aniline by Benzyl Alcohol
title_full Using the Colloidal Method to Prepare Au Catalysts for the Alkylation of Aniline by Benzyl Alcohol
title_fullStr Using the Colloidal Method to Prepare Au Catalysts for the Alkylation of Aniline by Benzyl Alcohol
title_full_unstemmed Using the Colloidal Method to Prepare Au Catalysts for the Alkylation of Aniline by Benzyl Alcohol
title_short Using the Colloidal Method to Prepare Au Catalysts for the Alkylation of Aniline by Benzyl Alcohol
title_sort using the colloidal method to prepare au catalysts for the alkylation of aniline by benzyl alcohol
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10573501/
https://www.ncbi.nlm.nih.gov/pubmed/37834224
http://dx.doi.org/10.3390/ijms241914779
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