Solvent‐Dependent Growth and Stabilization Mechanisms of Surfactant‐Free Colloidal Pt Nanoparticles

Autor:	Sarah Neumann, Alessandro Zana, Søren Bredmose Simonsen, Tom Vosch, Jacob J. K. Kirkensgaard, Luise Theil Kuhn, Laura Kacenauskaite, Mehtap Oezaslan, Matthias Arenz, Jan Bucher, Jonathan Quinson, Sebastian Kunz
Rok vydání:	2020
Předmět:	IONS synthesis education Nucleation Nanoparticle METAL NANOPARTICLES OXIDATION 010402 general chemistry 01 natural sciences surfactant-free Catalysis chemistry.chemical_compound Colloid Adsorption colloids Co4Cat technology ETHANOL 540 Chemistry CATALYTIC-ACTIVITY PLATINUM 010405 organic chemistry Chemistry Organic Chemistry technology industry and agriculture General Chemistry PARTICLE-SIZE Nanomaterial-based catalyst 0104 chemical sciences Solvent REDUCTION NANOCRYSTALS Chemical engineering 570 Life sciences biology Particle nanoparticles METHANOL Methanol
Zdroj:	Chemistry – A European Journal Quinson, J, Neumann, S, Kacenauskaite, L, Bucher, J, Kirkensgaard, J J K, Simonsen, S B, Kuhn, L T, Zana, A, Vosch, T, Oezaslan, M, Kunz, S & Arenz, M 2020, ' Solvent-Dependent Growth and Stabilization Mechanisms of Surfactant-Free Colloidal Pt Nanoparticles ', Chemistry: A European Journal, vol. 26, no. 41, pp. 9012-9023 . https://doi.org/10.1002/chem.202001553 Quinson, J, Neumann, S, Kacenauskaite, L, Bucher, J, Kirkensgaard, J J K, Bredmose Simonsen, S, Kuhn, L T, Zana, A, Vosch, T, Oezaslan, M, Kunz, S & Arenz, M 2020, ' Solvent-dependent growth and stabilization mechanisms of surfactant-free colloidal Pt nanoparticles ', Chemistry-A European Journal, vol. 26, no. 41, pp. 9012-9023 . https://doi.org/10.1002/chem.202001553
ISSN:	1521-3765 0947-6539
DOI:	10.1002/chem.202001553
Popis:	Understanding the formation of nanoparticles (NPs) is key to develop materials via sustainable routes. The Co4Cat TM process is a new synthesis of precious metal NPs in alkaline mono-alcohols well-suited to develop active nanocatalysts. The synthesis is 'facile', surfactant-free and performed under mild conditions like low temperature. Interestingly, this process is sensitive to parameters masked in other colloidal syntheses. The oxidation properties of the solvent are here shown to strongly influence the formation of Pt NPs. Based on the in situ formation of CO adsorbed on the NP surface by solvent oxidation, a model is proposed that accounts for the different growth and stabilization mechanisms as well as re-dispersion properties of the surfactant-free NPs in different solvents. Using in situ and ex situ characterizations, it is established that in methanol, a slow nucleation with a limited NP growth is achieved. In ethanol, a fast nucleation followed by continuous and pronounced particle sintering occurs. The results support further strategies to rationally design, investigate, control and produce improved NPs for fundamental and applied research.
Databáze:	OpenAIRE
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