Teaching old precursors new tricks: Fast room temperature synthesis of surfactant-free colloidal platinum nanoparticles.

Autor: Quinson J; University of Copenhagen, Chemistry Department, Universitetsparken 5, 2100 Copenhagen Ø, Denmark. Electronic address: jonathan.quinson@chem.ku.dk., Mathiesen JK; University of Copenhagen, Chemistry Department, Universitetsparken 5, 2100 Copenhagen Ø, Denmark., Schröder J; University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3 CH-3012 Bern, Switzerland., Dworzak A; School of Mathematics and Science, Department of Chemistry, Carl von Ossietzky Universität Oldenburg, 26111 Oldenburg, Germany., Bizzotto F; University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3 CH-3012 Bern, Switzerland., Zana A; University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3 CH-3012 Bern, Switzerland., Simonsen SB; Technical, University of Denmark, Department of Energy Conversion and Storage, Fysikvej Bldg. 310, DK-2800 Kgs. Lyngby, Denmark., Theil Kuhn L; Technical, University of Denmark, Department of Energy Conversion and Storage, Fysikvej Bldg. 310, DK-2800 Kgs. Lyngby, Denmark., Oezaslan M; School of Mathematics and Science, Department of Chemistry, Carl von Ossietzky Universität Oldenburg, 26111 Oldenburg, Germany., Jensen KMØ; University of Copenhagen, Chemistry Department, Universitetsparken 5, 2100 Copenhagen Ø, Denmark. Electronic address: kirsten@chem.ku.dk., Arenz M; University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3 CH-3012 Bern, Switzerland. Electronic address: matthias.arenz@dcb.unibe.ch.
Jazyk: angličtina
Zdroj: Journal of colloid and interface science [J Colloid Interface Sci] 2020 Oct 01; Vol. 577, pp. 319-328. Date of Electronic Publication: 2020 May 25.
DOI: 10.1016/j.jcis.2020.05.078
Abstrakt: A fast, simple, instrument-free room temperature synthesis of stable electroactive surfactant-free colloidal Pt nanoparticles in alkaline methanol and methanol-water mixtures is presented. Pair distribution function (PDF) analysis suggests that methoxy substitution of chloride ligands from H 2 PtCl 6 occurs in methanol. X-ray absorption spectroscopy (XAS) studies and UV-vis measurements show that solutions of H 2 PtCl 6 in methanol age and are reduced to Pt(II) species over time. These species are ideal precursors to significantly reduce the induction period typically observed in colloidal Pt nanoparticle syntheses as well as the temperature needed to form nanoparticles. The room temperature synthesis presented here allows designing simple in situ studies of the nanoparticle formation. In situ infra-red spectroscopy gives insight into the formation and stabilization mechanism of surfactant-free nanoparticles by CO surface groups. Finally, the surfactant-free nanoparticles ca. 2-3 nm in diameter obtained are shown to be readily active electrocatalysts e.g. for methanol oxidation. The synthesis approach presented bears several advantages to design new studies and new syntheses of surfactant-free colloidal nanomaterials.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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