发明授权
- 专利标题: Platinum-containing catalyst and method of producing the same, electrode and electrochemical device
- 专利标题(中): 含铂催化剂及其制备方法,电极和电化学装置
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申请号: US13124960申请日: 2009-10-29
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公开(公告)号: US08871672B2公开(公告)日: 2014-10-28
- 发明人: Shuji Goto , Shizuka Hosoi , Yuli Li , Yoshihiro Kudo , Akihiro Maesaka
- 申请人: Shuji Goto , Shizuka Hosoi , Yuli Li , Yoshihiro Kudo , Akihiro Maesaka
- 申请人地址: JP
- 专利权人: Sony Corporation
- 当前专利权人: Sony Corporation
- 当前专利权人地址: JP
- 代理机构: Sheridan Ross P.C.
- 优先权: JP2008-279144 20081030; JP2009-202426 20090902; JP2009-245394 20091026
- 国际申请: PCT/JP2009/068578 WO 20091029
- 国际公布: WO2010/050550 WO 20100506
- 主分类号: B01J21/18
- IPC分类号: B01J21/18 ; B01J23/40 ; B01J23/74 ; B01J23/00 ; B01J23/42 ; B01J23/72 ; H01M4/02 ; H01M4/36 ; H01M4/92 ; H01M4/94 ; H01M4/90 ; H01M8/00 ; H01M4/86
摘要:
In one example embodiment, a core-shell type platinum-containing catalyst is allowed to reduce the amount of used platinum and has high catalytic activity and stability. In one example embodiment, the core-shell type platinum-containing catalyst includes a core particle (with an average particle diameter R1) made of a non-platinum element and a platinum shell layer (with an average thickness ts) satisfying 1.4 nm≦R1≦3.5 nm and 0.25 nm≦ts≦0.9 nm. The core particle includes an element satisfying Eout≧3.0 eV, where average binding energy relative to the Fermi level of 5d orbital electrons of platinum present on an outermost surface of the shell layer is Eout. In a fuel cell including a platinum-containing catalyst which contains a Ru particle as a core particle, the output density at a current density of 300 mA/cm2 is 70 mW/cm2 or over, and an output retention ratio is approximately 90% or over.