The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2005
Filed:
Nov. 28, 2001
Rolf Hempelmann, Ingbert, DE;
Heinz Schmitz, Jülich, DE;
March-simon Löffler, Saarbrücken, DE;
Harald Natter, Saarbrücken, DE;
Jiri Divisek, Jülich, DE;
Rolf Hempelmann, Ingbert, DE;
Heinz Schmitz, Jülich, DE;
March-Simon Löffler, Saarbrücken, DE;
Harald Natter, Saarbrücken, DE;
Jiri Divisek, Jülich, DE;
Forschungszentrum Julich GmbH, Julich, DE;
Prof. Dr. Rolf Hempelmann, Ingbert, DE;
Abstract
The invention relates to a method for deposition of a catalyst, in particular a method for coating a membrane electrode unit (MEA) for a fuel cell. Said method requires no external electrical field as usual for conventional galvanic techniques. The support for the catalytic layer is first capacitively charged (pseudocapacitance). When brought into contact with an electrolyte solution, comprising the catalyst in the form of dissolved metal salt ions, an in-situ reduction (deposition) of the metal salt ions to give metallic catalyst occurs at the site of contact.