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:
Jul. 05, 2016
Filed:
Nov. 07, 2012
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Audi Ag, Ingolstadt, DE;
Keiichi Kaneko, Susono, JP;
Naoki Takehiro, Shizuoka-ken, JP;
Takumi Taniguchi, Susono, JP;
Tatsuya Arai, Susono, JP;
Noriyuki Kitao, Shizuoka-ken, JP;
Makoto Adachi, Numazu, JP;
Hiroko Kimura, Susono, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-Shi, JP;
AUDI AG, Ingolstadt, DE;
Abstract
An object of the present invention is to provide a production method which can increase the activity of a catalyst particle comprising a core particle and an outermost layer, the core particle comprising at least one of palladium and a palladium alloy, and the outermost layer comprising at least one of platinum and a platinum alloy and covering the core particle. The method is for producing a catalyst for fuel cells, in which a catalyst particle is supported by an electroconductive carrier, the method comprising the steps of: preparing a supported catalyst in which a catalyst particle comprising a core particle and an outermost layer is supported by an electroconductive carrier, the core particle comprising at least one of palladium and a palladium alloy, and the outermost layer comprising at least one of platinum and a platinum alloy and covering the core particle; acid treatment to bring the supported catalyst into contact with an acid solution which dissolves palladium more preferentially than platinum; and firing the supported catalyst at 80° C. or more and less than 200° C. in a reducing gas atmosphere after the acid treatment step.