Expanding the Range: AuCu Metal Aerogels from H<sub<2</sub<O and EtOH

Due to their self-supporting and nanoparticulate structure, metal aerogels have emerged as excellent electrocatalysts, especially in the light of the shift to renewable energy cycles. While a large number of synthesis parameters have already been studied in depth, only superficial attention has been...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Maximilian Georgi [verfasserIn] Johannes Kresse [verfasserIn] Karl Hiekel [verfasserIn] René Hübner [verfasserIn] Alexander Eychmüller [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2022

Schlagwörter:	metal aerogel gold copper ethanol water

Übergeordnetes Werk:	In: Catalysts - MDPI AG, 2012, 12(2022), 4, p 441
Übergeordnetes Werk:	volume:12 ; year:2022 ; number:4, p 441

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/catal12040441

Katalog-ID:	DOAJ04442633X

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language	English
source	In Catalysts 12(2022), 4, p 441 volume:12 year:2022 number:4, p 441
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authorswithroles_txt_mv	Maximilian Georgi @@aut@@ Johannes Kresse @@aut@@ Karl Hiekel @@aut@@ René Hübner @@aut@@ Alexander Eychmüller @@aut@@
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callnumber-first	T - Technology
author	Maximilian Georgi
spellingShingle	Maximilian Georgi misc TP1-1185 misc QD1-999 misc metal misc aerogel misc gold misc copper misc ethanol misc water misc Chemical technology misc Chemistry Expanding the Range: AuCu Metal Aerogels from H<sub<2</sub<O and EtOH
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topic_title	TP1-1185 QD1-999 Expanding the Range: AuCu Metal Aerogels from H<sub<2</sub<O and EtOH metal aerogel gold copper ethanol water
topic	misc TP1-1185 misc QD1-999 misc metal misc aerogel misc gold misc copper misc ethanol misc water misc Chemical technology misc Chemistry
topic_unstemmed	misc TP1-1185 misc QD1-999 misc metal misc aerogel misc gold misc copper misc ethanol misc water misc Chemical technology misc Chemistry
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title	Expanding the Range: AuCu Metal Aerogels from H<sub<2</sub<O and EtOH
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title_full	Expanding the Range: AuCu Metal Aerogels from H<sub<2</sub<O and EtOH
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author_browse	Maximilian Georgi Johannes Kresse Karl Hiekel René Hübner Alexander Eychmüller
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title_sort	expanding the range: aucu metal aerogels from h<sub<2</sub<o and etoh
callnumber	TP1-1185
title_auth	Expanding the Range: AuCu Metal Aerogels from H<sub<2</sub<O and EtOH
abstract	Due to their self-supporting and nanoparticulate structure, metal aerogels have emerged as excellent electrocatalysts, especially in the light of the shift to renewable energy cycles. While a large number of synthesis parameters have already been studied in depth, only superficial attention has been paid to the solvent. In order to investigate the influence of this parameter with respect to the gelation time, crystallinity, morphology, or porosity of metal gels, Au<sub<x</sub<Cu<sub<y</sub< aerogels were prepared in water and ethanol. It was shown that although gelation in water leads to highly porous gels (60 m<sup<2</sup<g<sup<−1</sup<), a CuO phase forms during this process. The undesired oxide could be selectively removed using a post-washing step with formic acid. In contrast, the solvent change to EtOH led to a halving of the gelation time and the suppression of Cu oxidation. Thus, pure Cu aerogels were synthesized in addition to various bimetallic Au<sub<3</sub<X (X = Ni, Fe, Co) gels. The faster gelation, caused by the lower permittivity of EtOH, led to the formation of thicker gel strands, which resulted in a lower porosity of the Au<sub<x</sub<Cu<sub<y</sub< aerogels. The advantage given by the solvent choice simplifies the preparation of metal aerogels and provides deeper knowledge about their gelation.
abstractGer	Due to their self-supporting and nanoparticulate structure, metal aerogels have emerged as excellent electrocatalysts, especially in the light of the shift to renewable energy cycles. While a large number of synthesis parameters have already been studied in depth, only superficial attention has been paid to the solvent. In order to investigate the influence of this parameter with respect to the gelation time, crystallinity, morphology, or porosity of metal gels, Au<sub<x</sub<Cu<sub<y</sub< aerogels were prepared in water and ethanol. It was shown that although gelation in water leads to highly porous gels (60 m<sup<2</sup<g<sup<−1</sup<), a CuO phase forms during this process. The undesired oxide could be selectively removed using a post-washing step with formic acid. In contrast, the solvent change to EtOH led to a halving of the gelation time and the suppression of Cu oxidation. Thus, pure Cu aerogels were synthesized in addition to various bimetallic Au<sub<3</sub<X (X = Ni, Fe, Co) gels. The faster gelation, caused by the lower permittivity of EtOH, led to the formation of thicker gel strands, which resulted in a lower porosity of the Au<sub<x</sub<Cu<sub<y</sub< aerogels. The advantage given by the solvent choice simplifies the preparation of metal aerogels and provides deeper knowledge about their gelation.
abstract_unstemmed	Due to their self-supporting and nanoparticulate structure, metal aerogels have emerged as excellent electrocatalysts, especially in the light of the shift to renewable energy cycles. While a large number of synthesis parameters have already been studied in depth, only superficial attention has been paid to the solvent. In order to investigate the influence of this parameter with respect to the gelation time, crystallinity, morphology, or porosity of metal gels, Au<sub<x</sub<Cu<sub<y</sub< aerogels were prepared in water and ethanol. It was shown that although gelation in water leads to highly porous gels (60 m<sup<2</sup<g<sup<−1</sup<), a CuO phase forms during this process. The undesired oxide could be selectively removed using a post-washing step with formic acid. In contrast, the solvent change to EtOH led to a halving of the gelation time and the suppression of Cu oxidation. Thus, pure Cu aerogels were synthesized in addition to various bimetallic Au<sub<3</sub<X (X = Ni, Fe, Co) gels. The faster gelation, caused by the lower permittivity of EtOH, led to the formation of thicker gel strands, which resulted in a lower porosity of the Au<sub<x</sub<Cu<sub<y</sub< aerogels. The advantage given by the solvent choice simplifies the preparation of metal aerogels and provides deeper knowledge about their gelation.
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title_short	Expanding the Range: AuCu Metal Aerogels from H<sub<2</sub<O and EtOH
url	https://doi.org/10.3390/catal12040441 https://doaj.org/article/7f7a9c3c77844c7d978a7b7687d0c4c5 https://www.mdpi.com/2073-4344/12/4/441 https://doaj.org/toc/2073-4344
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up_date	2024-07-03T22:57:19.512Z
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Expanding the Range: AuCu Metal Aerogels from H<sub<2</sub<O and EtOH

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