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Electroless Synthesis of Highly Stable and Free-Standing Porous Pt Nanotube Networks and their Application in Methanol Oxidation

Walbert, Torsten and Antoni, Markus and Muench, Falk and Späth, Thomas and Ensinger, Wolfgang (2018):
Electroless Synthesis of Highly Stable and Free-Standing Porous Pt Nanotube Networks and their Application in Methanol Oxidation.
5, In: ChemElectroChem, (7), pp. 1087-1097. Wiley-VCH Verlag GmbH, Weinheim, ISSN 21960216,
DOI: 10.1002/celc.201701271,
[Article]

Abstract

Free‐standing 3D metal nanostructures represent an upcoming class of electrocatalysts for fuel cell technology, combining high aging stability and activity with efficient metal utilization while abstaining from additives such as polymer binders. Until now, most fabrication routes are complex and produce disordered nanostructures. Here, we present a highly adjustable, wet‐chemical synthesis route toward ordered, thin‐walled Pt nanotube networks. The approach includes an optimized electroless plating procedure and enables easy regulation of structural parameters (i. e. nanotube diameter, wall thickness, density) by using ion track‐etched polycarbonate templates. In comparison to individual nanotubes, the resulting nanonetworks exhibit a free‐standing and robust frame, which is a great advantage for use in various electrochemical and catalytic applications. Cyclic voltammetry studies of the methanol oxidation reaction demonstrate enhanced electrocatalytic activity compared to commercially available Pt nanoparticles. The nanonetworks provide outstanding long‐life stability with up to 97 % of the initial active surface area after 1000 cycles, which makes them a promising material in different application fields, for example, in direct methanol fuel cells.

Item Type: Article
Erschienen: 2018
Creators: Walbert, Torsten and Antoni, Markus and Muench, Falk and Späth, Thomas and Ensinger, Wolfgang
Title: Electroless Synthesis of Highly Stable and Free-Standing Porous Pt Nanotube Networks and their Application in Methanol Oxidation
Language: English
Abstract:

Free‐standing 3D metal nanostructures represent an upcoming class of electrocatalysts for fuel cell technology, combining high aging stability and activity with efficient metal utilization while abstaining from additives such as polymer binders. Until now, most fabrication routes are complex and produce disordered nanostructures. Here, we present a highly adjustable, wet‐chemical synthesis route toward ordered, thin‐walled Pt nanotube networks. The approach includes an optimized electroless plating procedure and enables easy regulation of structural parameters (i. e. nanotube diameter, wall thickness, density) by using ion track‐etched polycarbonate templates. In comparison to individual nanotubes, the resulting nanonetworks exhibit a free‐standing and robust frame, which is a great advantage for use in various electrochemical and catalytic applications. Cyclic voltammetry studies of the methanol oxidation reaction demonstrate enhanced electrocatalytic activity compared to commercially available Pt nanoparticles. The nanonetworks provide outstanding long‐life stability with up to 97 % of the initial active surface area after 1000 cycles, which makes them a promising material in different application fields, for example, in direct methanol fuel cells.

Journal or Publication Title: ChemElectroChem
Volume: 5
Number: 7
Publisher: Wiley-VCH Verlag GmbH, Weinheim
Uncontrolled Keywords: cyclic voltammetry, electrocatalysis, electroless plating, nanotubes, platinum
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
Date Deposited: 27 Jun 2018 07:55
DOI: 10.1002/celc.201701271
Official URL: https://doi.org/10.1002/celc.201701271
Funders: Financial support by the German Research Foundation is gratefully acknowledged (Project MIT-Nano).
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