Monovalent Alkali Cations: Simple and Eco-Friendly Stabilizers for Surfactant-Free Precious Metal Nanoparticle Colloids

Jonathan Quinson; Jan Rudolf Bucher; Søren Bredmose Simonsen; Luise Theil Kuhn; Sebastian Kunz; Matthias Arenz

doi:10.1021/acssuschemeng.9b00681

Monovalent Alkali Cations: Simple and Eco-Friendly Stabilizers for Surfactant-Free Precious Metal Nanoparticle Colloids

Jonathan Quinson, Jan Rudolf Bucher, Søren Bredmose Simonsen, Luise Theil Kuhn, Sebastian Kunz, Matthias Arenz

Department of Chemistry

9 Citations (Scopus)

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Abstract

The Co4Cat approach is a surfactant-free industry-relevant method to synthesize precious metal nanoparticles with enhanced catalytic properties. Colloidal nanoparticles are obtained by reduction of a metal salt in a monoalcohol such as methanol in the presence of a base. As opposed to alternative surfactant-free syntheses, in the Co4Cat approach, the nature of the alkali cations used strongly influences the most suitable strategy to achieve different nanoparticle size, to process and to stabilize surfactant-free platinum nanoparticles. The rational selection of the base needed in the Co4Cat process is detailed here. Monovalent alkali cations stabilize the as-synthesized and redispersed nanoparticles in monoalcohols and aqueous solvents with the decreasing order of efficiency: Li⁺> Na⁺ > K⁺ ≈ Cs⁺ which correlates with the decreasing hydration energy of the cation. Li⁺ and Na⁺ cations are shown to serve as simple, eco-friendly, and efficient stabilizers for surfactant-free platinum nanoparticle colloids.

Original language	English
Journal	ACS Sustainable Chemistry & Engineering
Volume	7
Issue number	16
Pages (from-to)	13680-13686
Number of pages	7
ISSN	2168-0485
DOIs	https://doi.org/10.1021/acssuschemeng.9b00681
Publication status	Published - 19 Aug 2019

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Monovalent Alkali Cations: Simple and Eco-Friendly Stabilizers for Surfactant-Free Precious Metal Nanoparticle Colloids. / Quinson, Jonathan; Bucher, Jan Rudolf; Simonsen, Søren Bredmose et al.
In: ACS Sustainable Chemistry & Engineering, Vol. 7, No. 16, 19.08.2019, p. 13680-13686.

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abstract = "The Co4Cat approach is a surfactant-free industry-relevant method to synthesize precious metal nanoparticles with enhanced catalytic properties. Colloidal nanoparticles are obtained by reduction of a metal salt in a monoalcohol such as methanol in the presence of a base. As opposed to alternative surfactant-free syntheses, in the Co4Cat approach, the nature of the alkali cations used strongly influences the most suitable strategy to achieve different nanoparticle size, to process and to stabilize surfactant-free platinum nanoparticles. The rational selection of the base needed in the Co4Cat process is detailed here. Monovalent alkali cations stabilize the as-synthesized and redispersed nanoparticles in monoalcohols and aqueous solvents with the decreasing order of efficiency: Li+> Na+ > K+ ≈ Cs+ which correlates with the decreasing hydration energy of the cation. Li+ and Na+ cations are shown to serve as simple, eco-friendly, and efficient stabilizers for surfactant-free platinum nanoparticle colloids.",

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AU - Kuhn, Luise Theil

AU - Kunz, Sebastian

AU - Arenz, Matthias

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AB - The Co4Cat approach is a surfactant-free industry-relevant method to synthesize precious metal nanoparticles with enhanced catalytic properties. Colloidal nanoparticles are obtained by reduction of a metal salt in a monoalcohol such as methanol in the presence of a base. As opposed to alternative surfactant-free syntheses, in the Co4Cat approach, the nature of the alkali cations used strongly influences the most suitable strategy to achieve different nanoparticle size, to process and to stabilize surfactant-free platinum nanoparticles. The rational selection of the base needed in the Co4Cat process is detailed here. Monovalent alkali cations stabilize the as-synthesized and redispersed nanoparticles in monoalcohols and aqueous solvents with the decreasing order of efficiency: Li+> Na+ > K+ ≈ Cs+ which correlates with the decreasing hydration energy of the cation. Li+ and Na+ cations are shown to serve as simple, eco-friendly, and efficient stabilizers for surfactant-free platinum nanoparticle colloids.

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Monovalent Alkali Cations: Simple and Eco-Friendly Stabilizers for Surfactant-Free Precious Metal Nanoparticle Colloids

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