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Templated synthesis of pure and bimetallic gold/platinum nanotubes using complementary seeding and plating reactions

Muench, Falk and Hussein, Laith and Stohr, Tobias and Kunz, Ulrike and Ayata, Sevda and Gärtner, Ingeborg and Kleebe, Hans-Joachim and Ensinger, Wolfgang (2016):
Templated synthesis of pure and bimetallic gold/platinum nanotubes using complementary seeding and plating reactions.
508, In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, pp. 197-204, ISSN 0927-7757, [Online-Edition: http://www.sciencedirect.com/science/article/pii/S0927775716...],
[Article]

Abstract

The application of electroless plating to porous template membranes displays an important route towards one-dimensional metal nanostructures such as nanotubes. For this reaction class, activation pretreatments are required to introduce catalyst seeds, which initiate surface-selective metal deposition from the metastable plating baths. Hitherto, these pretreatments are performed as a means to an end to ensure reliable metal film nucleation, and introduce often undesired contaminations. In this work, we demonstrate that the seeding step can be recognized as a synthetic tool to purposefully adjust the chemical composition of electrolessly plated nanomaterials. By consecutive application of several interfacial reactions (polymer swelling, reducing agent absorption, metal nanoparticle nucleation, autocatalytic metal deposition), we fabricate gold-platinum nanotubes of well-defined composition. Aside strictly monometallic gold and platinum nanotubes, bimetallic nanotubes are produced which consist of platinum nanoparticles embedded in gold walls. As shown in the electrooxidation of formic acid, the nanotube composition has a pronounced impact on the properties of the resulting materials and can be used to enhance the catalyst performance. The outlined strategy provides a versatile route towards sets of compositionally varying metal nanostructures and allows to examine and to exploit multi-element synergies.

Item Type: Article
Erschienen: 2016
Creators: Muench, Falk and Hussein, Laith and Stohr, Tobias and Kunz, Ulrike and Ayata, Sevda and Gärtner, Ingeborg and Kleebe, Hans-Joachim and Ensinger, Wolfgang
Title: Templated synthesis of pure and bimetallic gold/platinum nanotubes using complementary seeding and plating reactions
Language: English
Abstract:

The application of electroless plating to porous template membranes displays an important route towards one-dimensional metal nanostructures such as nanotubes. For this reaction class, activation pretreatments are required to introduce catalyst seeds, which initiate surface-selective metal deposition from the metastable plating baths. Hitherto, these pretreatments are performed as a means to an end to ensure reliable metal film nucleation, and introduce often undesired contaminations. In this work, we demonstrate that the seeding step can be recognized as a synthetic tool to purposefully adjust the chemical composition of electrolessly plated nanomaterials. By consecutive application of several interfacial reactions (polymer swelling, reducing agent absorption, metal nanoparticle nucleation, autocatalytic metal deposition), we fabricate gold-platinum nanotubes of well-defined composition. Aside strictly monometallic gold and platinum nanotubes, bimetallic nanotubes are produced which consist of platinum nanoparticles embedded in gold walls. As shown in the electrooxidation of formic acid, the nanotube composition has a pronounced impact on the properties of the resulting materials and can be used to enhance the catalyst performance. The outlined strategy provides a versatile route towards sets of compositionally varying metal nanostructures and allows to examine and to exploit multi-element synergies.

Journal or Publication Title: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume: 508
Uncontrolled Keywords: Electroless plating, Heterogeneous catalysis, Metal nanotubes, Nanoparticles, Polymer swelling, Template
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences > Material Science > Physical Metallurgy
Date Deposited: 20 Sep 2016 05:41
Official URL: http://www.sciencedirect.com/science/article/pii/S0927775716...
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