Catalyst support material comprising polyazole, electrochemical catalyst, and the preparation of a gas diffusion electrode and a membrane-electrode assembly therefrom

摘要

A process for preparing a catalyst material comprising an electrically conducting support material, a proton-conducting, polyazole-based polymer and a catalytically active material. A catalyst material prepared by the process of the invention. A catalyst ink comprising a catalyst material of the invention and a solvent. A catalyst-coated membrane (CCM) comprising a polymer electrolyte membrane and also catalytically active layers comprising a catalyst material of the present invention. A gas diffusion electrode (GDE) comprising a gas diffusion layer and a catalytically active layer comprising a catalyst material of the invention. A membrane-electrode assembly (MEA) comprising a polymer electrolyte membrane, catalytically active layers comprising a catalyst material of the invention, and gas diffusion layers. And a fuel cell comprising a membrane-electrode assembly of the present invention.

主权项

1. A process of preparing a catalyst material, the process comprising:
contacting an electrically conductive support material with a proton-conducting polyazole-based polymer that is not a membrane, and thereafter applying a precursor compound of a catalytically active material suitable for a fuel cell or applying a catalytically active material suitable for a fuel cell itself to the support material, and if a precursor compound of the catalytically active material is applied, converting the precursor compound into the catalytically active material by reduction, thereby obtaining a catalyst material comprising the electrically conductive support material, the proton-conducting polyazole-based polymer, and the catalytically active material, wherein the catalytically active material is not masked by the polyazole-based polymer.