Controlled Synthesis of Surfactant-Free Water-Dispersible Colloidal Platinum Nanoparticles by the Co4Cat Process
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Controlled Synthesis of Surfactant-Free Water-Dispersible Colloidal Platinum Nanoparticles by the Co4Cat Process. / Quinson, Jonathan; Kacenauskaite, Laura; Bucher, Jan; Simonsen, Søren B.; Theil Kuhn, Luise; Oezaslan, Mehtap; Kunz, Sebastian; Arenz, Matthias.
I: ChemSusChem, Bind 12, Nr. 6, 2019, s. 1229-1239.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Controlled Synthesis of Surfactant-Free Water-Dispersible Colloidal Platinum Nanoparticles by the Co4Cat Process
AU - Quinson, Jonathan
AU - Kacenauskaite, Laura
AU - Bucher, Jan
AU - Simonsen, Søren B.
AU - Theil Kuhn, Luise
AU - Oezaslan, Mehtap
AU - Kunz, Sebastian
AU - Arenz, Matthias
PY - 2019
Y1 - 2019
N2 - The recently reported Co4Cat process is a synthesis method bearing ecological and economic benefits to prepare precious-metal nanoparticles (NPs) with optimized catalytic properties. In the Co4Cat process, a metal precursor (e.g., H 2 PtCl 6 ) is dissolved in an alkaline solution of a low-boiling-point solvent (methanol) and reduced to NPs at low temperature (<80 °C) without the use of surfactants. Here, the Co4Cat process to prepare Pt NPs is described in detail. The advantages of this new synthesis method for research and development but also industrial production are highlighted in a comparison with the popular “polyol” synthesis. The reduction of H 2 PtCl 6 from Pt IV to Pt II and further to Pt 0 is followed by UV/Vis and XANES/EXAFS measurements. It is demonstrated how the synthesis can be accelerated, how size control is achieved, and how the colloidal dispersions can be stabilized without the use of surfactants. Despite being surfactant-free, the Pt NPs exhibit surprisingly long-term (up to 16 months) stability in water over a wide pH range (4–12) and in aqueous buffer solutions. The Co4Cat process is thus relevant to produce NPs for heterogeneous catalysis, electro-catalysis, or bio/medical applications.
AB - The recently reported Co4Cat process is a synthesis method bearing ecological and economic benefits to prepare precious-metal nanoparticles (NPs) with optimized catalytic properties. In the Co4Cat process, a metal precursor (e.g., H 2 PtCl 6 ) is dissolved in an alkaline solution of a low-boiling-point solvent (methanol) and reduced to NPs at low temperature (<80 °C) without the use of surfactants. Here, the Co4Cat process to prepare Pt NPs is described in detail. The advantages of this new synthesis method for research and development but also industrial production are highlighted in a comparison with the popular “polyol” synthesis. The reduction of H 2 PtCl 6 from Pt IV to Pt II and further to Pt 0 is followed by UV/Vis and XANES/EXAFS measurements. It is demonstrated how the synthesis can be accelerated, how size control is achieved, and how the colloidal dispersions can be stabilized without the use of surfactants. Despite being surfactant-free, the Pt NPs exhibit surprisingly long-term (up to 16 months) stability in water over a wide pH range (4–12) and in aqueous buffer solutions. The Co4Cat process is thus relevant to produce NPs for heterogeneous catalysis, electro-catalysis, or bio/medical applications.
KW - Co4Cat
KW - colloids
KW - nanoparticles
KW - platinum
KW - water-dispersibility
U2 - 10.1002/cssc.201802897
DO - 10.1002/cssc.201802897
M3 - Journal article
C2 - 30673164
AN - SCOPUS:85063204448
VL - 12
SP - 1229
EP - 1239
JO - ChemSusChem
JF - ChemSusChem
SN - 1864-5631
IS - 6
ER -
ID: 216930224