Investigation of the Influence of Graphitisation Degree of Carbon Nano Fibres Serving as Catalyst Support Material for Noble Metal Electro Catalysts on the Performance of PEM Fuel Cells

  • In polymer electrolyte membrane fuel cells (PEMFC) noble metal nano particles are deposited on graphitic supports serving as electrocatalysts for devices with high power density. In this study anodes are analysed with low platinum loading of about 0.1 mg cm-2. These electrodes are prepared by carbon nano fibres (CNF) decorated with platinum nano particles. For electrode manufacturing two sorts of fibres, which are produced in an industrial scale, are used with different graphitisation degree and surface area. CNF layers are applied on commercially available graphitic substrate by spray coating which leads to a porous structure with high surface area. Subsequently, platinum deposition is achieved by pulsed electroplating for an improved platinum utilisation in PEMFC electrodes. Spray coating and platinum deposition are assisted by a previous oxygen plasma activation process. Prepared anode material is characterised by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction spectroscopy (XRD), X-ray fluorescence spectroscopy (XRF) and thermogravimetry (TGA). Electrochemical analyses (cyclic voltammetry and corrosion test) are carried out in 0.5 M sulphuric acid. The effect of graphitisation degree of carbon nano fibres on the performance of prepared electrodes is investigated in-situ in a PEM fuel cell test bench.

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Author:Ulrich Rost, Roxana Muntean, Pit Podleschny, Gabriela Marginean, Michael Brodmann, Viorel-Aurel Serban
Parent Title (English):Sixth International Conference on Advanced Materials and Structures. 16-17 October 2015, Timisoara, Romania
Publisher:Editura Politehnica
Place of publication:Timișoara
Editor: Politehnica University of Timisoara
Document Type:Conference Proceeding
Language:English
Date of Publication (online):2017/01/31
Date of first Publication:2015/10/16
Publishing Institution:Westfälische Hochschule Gelsenkirchen Bocholt Recklinghausen
Release Date:2017/02/02
First Page:6
Departments / faculties:Institute / Westfälisches Energieinstitut
Licence (German):License LogoEs gilt das Urheberrechtsgesetz

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