at Google ScholarTitle 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
(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 Inorganic Colloids for Electrochemical Energy storage > Chair Chair Inorganic Colloids for Electrochemical Energy storage - 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 Inorganic Colloids for Electrochemical Energy storage |
| Result of work at the UBT: | Yes |
| DDC Subjects: | 500 Science > 540 Chemistry |
| Date Deposited: | 23 Mar 2018 08:25 |
| Last Modified: | 06 Jun 2024 12:31 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/9996 |