发明名称 |
Core/shell-type catalyst particles 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 |
US8691717(B2) |
申请公布日期 |
2014.04.08 |
申请号 |
US201213557103 |
申请日期 |
2012.07.24 |
申请人 |
LOPEZ MARCO;LENNARTZ MICHAEL;GOIA DAN V.;BECKER CARSTEN;CHEVALLIOT STEPHANIE;UMICORE AG & CO. KG |
发明人 |
LOPEZ MARCO;LENNARTZ MICHAEL;GOIA DAN V.;BECKER CARSTEN;CHEVALLIOT STEPHANIE |
分类号 |
H01M4/02;B01J21/18;B01J23/00;B01J23/40;B01J23/74;B32B5/16;B32B9/00;B32B15/02;B32B17/02;B32B19/00;B32B21/02;B32B23/02;B32B27/02;H01M4/36;H01M4/88;H01M4/90;H01M4/92;H01M4/94 |
主分类号 |
H01M4/02 |
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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