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Shape selection through epitaxy of supported platinum nanocrystals

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Supported nanocrystals of original shapes are highly desirable for the development of optimized catalysts; however, conventional methods for the preparation of supported catalysts do not allow shape control. In this work, we have synthesized concave platinum nanocubes exposing {110} crystallographic facets at 20 °C. In the presence of a crystallographically oriented Pt(111) support in the reaction medium, the concave nanocubes grow epitaxially on the support, producing macroscopic nanostructured surfaces. Higher reaction temperature produces a mixture of different nanostructures in solution; however, only the nanostructures growing along the 〈111〉 direction are obtained on the Pt(111) support. Therefore, the oriented surface acts as a template for a selective immobilization of specific nanostructures out of a mixture, which can be regarded as an “epitaxial resolution” of an inhomogeneous mixture of nanocrystals. Thus, a judicious choice of the support crystallographic orientation may allow the isolation of original nanostructures that cannot be obtained in a pure form.

Graphical abstract: Shape selection through epitaxy of supported platinum nanocrystals

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The article was received on 14 Sep 2018, accepted on 13 Nov 2018 and first published on 14 Nov 2018

Article type: Communication
DOI: 10.1039/C8NR07515H
Citation: Nanoscale, 2018, Advance Article
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    Shape selection through epitaxy of supported platinum nanocrystals

    L. Peres, D. Yi, S. Bustos-Rodriguez, C. Marcelot, A. Pierrot, P. Fazzini, I. Florea, R. Arenal, L. Lacroix, B. Warot-Fonrose, T. Blon and K. Soulantica, Nanoscale, 2018, Advance Article , DOI: 10.1039/C8NR07515H

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