Carbon-Supported Gold, Platinum, Gold-Based Binary and Ternary Alloy Nanoparticles for Fuel Cell Catalysts
This invention describes a new technology that allows controllable preparation of highly active carbon-supported monometallic, binary and ternary nanoparticles as fuel cell catalysts. The working principles of the preparation involve core-shell approach in nanoparticle synthesis, controlled assembly and controlled calcination. The immediate application of this technology is fuel cell catalysis technology. In addition, it may find a wide range of applications involving the use of metal catalysts.
In comparison with existing methods for catalyst preparation (e.g., co-precipitation, impregnation, etc.), this new technology offers advantages in a number of areas. First, the size is fully controllable in the 2-nm range with highly monodispersity. Secondly, the monometallic, binary and ternary compositions are fully controllable. Thirdly, the nanoparticles are assembled onto carbon support with controllable loading. Fourthly, the carbon-supported nanoparticle catalysts can controllably calcinated with desired sizes and compositions. Finally, the calcinated carbon-supported catalysts exhibited electrocatalytic activities higher than existing commercial catalysts.
U.S. 7,335,245; 7,687,428
Binghamton University RB193