发明授权
- 专利标题: Core/shell-type catalyst particles and methods for their preparation
- 专利标题(中): 核/壳型催化剂颗粒及其制备方法
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申请号: US13557103申请日: 2012-07-24
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公开(公告)号: US08691717B2公开(公告)日: 2014-04-08
- 发明人: Marco Lopez , Michael Lennartz , Dan V. Goia , Carsten Becker , Stéphanie Chevalliot
- 申请人: Marco Lopez , Michael Lennartz , Dan V. Goia , Carsten Becker , Stéphanie Chevalliot
- 申请人地址: DE Hanau-Wolfgang
- 专利权人: Umicore AG & Co. KG
- 当前专利权人: Umicore AG & Co. KG
- 当前专利权人地址: DE Hanau-Wolfgang
- 代理机构: Levin Santalone LLP
- 代理商 John Santalone
- 主分类号: H01M4/02
- IPC分类号: H01M4/02 ; H01M4/36 ; H01M4/88 ; H01M4/90 ; H01M4/92 ; H01M4/94 ; B01J21/18 ; B01J23/00 ; B01J23/40 ; B01J23/74 ; B32B5/16 ; B32B9/00 ; B32B15/02 ; B32B17/02 ; B32B19/00 ; B32B21/02 ; B32B23/02 ; B32B27/02
摘要:
The invention discloses core/shell, type catalyst particles comprising a Mcore/Mshell structure with Mcore=inner particle core and Mshell=outer particle shell, wherein the medium diameter of the catalyst particle (dcore+shell) is in the range of 20 to 100 nm, preferably in the range of 20 to 50 nm. The thickness of the outer shell (tshell) 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.