发明名称 |
CORE/SHELL-TYPE CATALYST PARTICLES COMPRISING METAL OR CERAMIC CORE MATERIALS AND METHODS FOR THEIR PREPARATION |
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. |
申请公布号 |
EP2059361(A1) |
申请公布日期 |
2009.05.20 |
申请号 |
EP20070802928 |
申请日期 |
2007.08.27 |
申请人 |
UMICORE AG & CO. KG |
发明人 |
LOPEZ, MARCO;LENNARTZ, MICHAEL;GOIA, DAN V.;BECKER, CARSTEN;CHEVALLIOT, STEPHANIE |
分类号 |
B22F1/02;B01J23/38;B01J23/74;B22F1/00 |
主分类号 |
B22F1/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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