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. 24, 2012
Filed:
Aug. 27, 2007
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 is directed to 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, 5 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 inner particle core (M) of the particles comprises metal or ceramic materials, whereas the material of the outer shell (M) comprises precious metals and/or alloys thereof. The core/shell type catalyst particles are preferably supported on suitable support materials such as carbon black and can be used as electrocatalysts for fuel cells and for other catalytic applications.