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Showing 1 to 9 of 9 for “"Catalyst Ink"”.
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Influence of catalyst ink mixing procedures on catalyst layer properties and in-situ PEMFC performance
… been directed towards developing more active catalysts, the amount of catalyst required in the fuel cell can be further reduced by improving the platinum utilisation in the membrane electrode assembly. The platinum utilisation is a strong function of the catalyst layer preparation step and …
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Preparation of catalyst coated membranes using screen printing
… A key component of a PEFC is its platinum electrocatalyst. With an estimated 75% of the world’s platinum reserves and resources in South Africa, local development of this technology will allow South Africa to become a major player in the growing hydrogen economy. This project therefore forms part …
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The Leaching of Cobalt in Platinum-Cobalt Fuel Cell Catalysts
Platinum-cobalt catalysts have proved to be promising alternatives to the conventional platinum catalyst used for the ORR reaction at the cathode of PEM fuel cells. These catalysts, however, undergo leaching of cobalt in the harsh environment of the fuel cell during its operation as well as during …
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An Investigation of Different Methods of Fabricating Membrane Electrode Assemblies for Methanol Fuel Cells
… method using different processes to apply the catalyst ink. The performances of fabricated MEAs were evaluated using a potentiostat. Polarization curves and power density curves were produced to compare the performance of the cells and gain insight into the effects of various parameters on fuel …
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Direct Methanol Fuel Cells Using Pure Methanol
… influence on fuel crossover. First, an optimal catalyst ink design will be assessed by considering factors such as ionomer-to-catalyst ratios, solvent and substrate selection, and briefly, catalyst mass loading. Then, the use of a vapor feed direct methanol fuel cell (VFDMFC) will be employed …
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Fabrication of Catalyst Coated Membranes by Ultrasonic Spray for Proton Exchange Membrane Water Electrolysers
… utilising an important component called the catalyst-coated membrane (CCM). The CCM is composed of a membrane coated with noble metal-based catalyst nanoparticles that make up the anode and cathode electrodes. The sluggish anode kinetics and the elevated cost associated with the CCM have …
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Investigation of the Colloidal Behaviour of Carbon Black and Perfluorosulfonated Ionomer in Various Solvents
… black in solution as influenced by different ink parameters. The motivation for this work is to collect necessary data that would lead toward the development of an improved microstructure model of catalyst layer of polymer electrolyte membrane fuel cells. Ionomer aggregation behaviour in …
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Manufacturing all-polymer laminar flow-based fuel cells
… fabricated by hand-painting or spray painting a catalyst ink onto a gas diffusion electrode or membrane, however electrodes prepared via these techniques do not always have a uniform distribution of catalyst. Recently, e-jet printing has been developed as a method to deposit a variety of chemical …
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Low PGM PtCo alloy catalysts for low loading Polymer Electrolyte Membrane Fuel Cells
… electrode assemblies (MEAs) over costly Pt catalyst which limits PEMFC cost viability. PtCo alloy catalysts are attractive alternatives to Pt, with similar or higher catalytic activity at a reduced cost. The catalyst is combined with a perfluorosulfonic acid (PFSA) ionomer which serves as …