Engineering gold-platinum core-shell nanoparticles by self-limitation in solution

Ledendecker M, Paciok P, Osowiecki WT, Pander M, Heggen M, Goehl D, Kamat GA, Erbe A, Mayrhofer K, Alivisatos AP (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Communications Chemistry Nature Research

Book Volume: 5

Journal Issue: 1

DOI: 10.1038/s42004-022-00680-w

Abstract

Core-shell particles with thin noble metal shells represent an attractive material class with potential for various applications ranging from catalysis to biomedical and pharmaceutical applications to optical crystals. The synthesis of well-defined core-shell architectures remains, however, highly challenging. Here, we demonstrate that atomically-thin and homogeneous platinum shells can be grown via a colloidal synthesis method on a variety of gold nanostructures ranging from spherical nanoparticles to nanorods and nanocubes. The synthesis is based on the exchange of low binding citrate ligands on gold, the reduction of platinum and the subsequent kinetically hindered growth by carbon monoxide as strong binding ligand. The prerequisites for homogeneous growth are low core-binding ligands with moderate fast ligand exchange in solution, a mild reducing agent to mitigate homonucleation and a strong affinity of a second ligand system that can bind to the shell's surface. The simplicity of the described synthetic route can potentially be adapted to various other material libraries to obtain atomically smooth core-shell systems.

Authors with CRIS profile

Karl Mayrhofer Lehrstuhl für Elektrokatalyse (HIERN)

Involved external institutions

Max-Planck-Institut für Eisenforschung GmbH (MPIE) / Max Planck Institute for Iron Research DE Germany (DE) Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE) Technische Universität Darmstadt DE Germany (DE) University of California, Berkeley US United States (USA) (US) NTNU Trondheim - Norwegian University of Science and Technology NO Norway (NO)

How to cite

APA:

Ledendecker, M., Paciok, P., Osowiecki, W.T., Pander, M., Heggen, M., Goehl, D.,... Alivisatos, A.P. (2022). Engineering gold-platinum core-shell nanoparticles by self-limitation in solution. Communications Chemistry, 5(1). https://doi.org/10.1038/s42004-022-00680-w

MLA:

Ledendecker, Marc, et al. "Engineering gold-platinum core-shell nanoparticles by self-limitation in solution." Communications Chemistry 5.1 (2022).

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