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:
Apr. 08, 2014
Filed:
Jul. 24, 2012
Marco Lopez, Frankfurt, DE;
Michael Lennartz, Frankfurt, DE;
Dan V. Goia, Potsdam, NY (US);
Carsten Becker, Niedernberg, DE;
Stéphanie Chevalliot, Ancemont, FR;
Marco Lopez, Frankfurt, DE;
Michael Lennartz, Frankfurt, DE;
Dan V. Goia, Potsdam, NY (US);
Carsten Becker, Niedernberg, DE;
Stéphanie Chevalliot, Ancemont, FR;
Umicore AG & Co. KG, Hanau-Wolfgang, DE;
Abstract
The invention discloses core/shell, type catalyst particles comprising a M/Mstructure with M=inner particle core and M=outer particle shell, wherein the medium diameter of the catalyst particle (d) is in the range of 20 to 100 nm, preferably in the range of 20 to 50 nm. The thickness of the outer shell (t) is about 5 to 20% of the diameter of the inner particle core of said catalyst particle, preferably comprising at least 3 atomic layers. The core/shell type catalyst particles, particularly the particles comprising a Pt˜based shell reveal a high specific activity. The catalyst particles are preferably supported on suitable support materials such as carbon black and are used as electrocatalysts for fuel cells.