Solvent-Dependent Growth and Stabilization Mechanisms of Surfactant-Free Colloidal Pt Nanoparticles
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Solvent-Dependent Growth and Stabilization Mechanisms of Surfactant-Free Colloidal Pt Nanoparticles. / Quinson, Jonathan; Neumann, Sarah; Kacenauskaite, Laura; Bucher, Jan; Kirkensgaard, Jacob J. K.; Simonsen, Søren B.; Kuhn, Luise Theil; Zana, Alessandro; Vosch, Tom; Oezaslan, Mehtap; Kunz, Sebastian; Arenz, Matthias.
In: Chemistry: A European Journal, Vol. 26, No. 41, 2020, p. 9012-9023.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Solvent-Dependent Growth and Stabilization Mechanisms of Surfactant-Free Colloidal Pt Nanoparticles
AU - Quinson, Jonathan
AU - Neumann, Sarah
AU - Kacenauskaite, Laura
AU - Bucher, Jan
AU - Kirkensgaard, Jacob J. K.
AU - Simonsen, Søren B.
AU - Kuhn, Luise Theil
AU - Zana, Alessandro
AU - Vosch, Tom
AU - Oezaslan, Mehtap
AU - Kunz, Sebastian
AU - Arenz, Matthias
PY - 2020
Y1 - 2020
N2 - Understanding the formation of nanoparticles (NPs) is key to develop materials by 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. The reducing 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.
AB - Understanding the formation of nanoparticles (NPs) is key to develop materials by 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. The reducing 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.
KW - Co4Cat technology
KW - colloids
KW - nanoparticles
KW - surfactant-free
KW - synthesis
KW - PARTICLE-SIZE
KW - METAL NANOPARTICLES
KW - CATALYTIC-ACTIVITY
KW - PLATINUM
KW - NANOCRYSTALS
KW - OXIDATION
KW - REDUCTION
KW - METHANOL
KW - ETHANOL
KW - IONS
U2 - 10.1002/chem.202001553
DO - 10.1002/chem.202001553
M3 - Journal article
C2 - 32428349
VL - 26
SP - 9012
EP - 9023
JO - Chemistry: A European Journal
JF - Chemistry: A European Journal
SN - 0947-6539
IS - 41
ER -
ID: 244690292