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Single Nanocrystals of Platinum Prepared by Partial Dissolution of Au-Pt Nanoalloys

Title data

Schrinner, Marc C. ; Ballauff, Matthias ; Talmon, Yeshayahu ; Kauffmann, Yaron ; Thun, Jürgen ; Möller, Michael W. ; Breu, Josef:
Single Nanocrystals of Platinum Prepared by Partial Dissolution of Au-Pt Nanoalloys.
In: Science. Vol. 323 (30 January 2009) Issue 5914 . - pp. 617-620.
ISSN 1095-9203
DOI: https://doi.org/10.1126/science.1166703

Abstract in another language

Small metal nanoparticles that are also highly crystalline have the potential for showing enhanced catalytic activity. We describe the preparation of single nanocrystals of platinum that are 2 to 3 nanometers in diameter. These particles were generated and immobilized on spherical polyelectrolyte brushes consisting of a polystyrene core (diameter of ∼100 nanometers) onto which long chains of a cationic polyelectrolyte were affixed. In a first step, a nanoalloy of gold and platinum (a solid solution) was generated within the layer of cationic polyelectrolyte chains. In a second step, the gold was slowly and selectively dissolved by cyanide ions in the presence of oxygen. Cryogenic transmission electron microscopy, wide-angle x-ray scattering, and high-resolution transmission electron microscopy showed that the resulting platinum nanoparticles are faceted single crystals that remain embedded in the polyelectrolyte-chain layer. The composite systems of the core particles and the platinum single nanocrystals exhibit an excellent colloidal stability, as well as high catalytic activity in hydrogenation reactions in the aqueous phase.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry I > Chair Anorganic Chemistry I - Univ.-Prof. Dr. Josef Breu
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry I
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 23 Mar 2018 08:25
Last Modified: 23 Mar 2018 08:25
URI: https://eref.uni-bayreuth.de/id/eprint/9996