Patents by Inventor Dianxue Cao

Dianxue Cao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of making chalcogen catalysts for polymer electrolyte fuel cells
    Patent number: 7851399
    Abstract: A method of making an electrode catalyst material using aqueous solutions. The electrode catalyst material includes a support comprising at least one transition metal and at least one chalcogen disposed on a surface of the transition metal. The method includes reducing a metal powder, mixing the metal powder with an aqueous solution containing at least one inorganic compound of the chalcogen to form a mixture, and providing a reducing agent to the mixture to form nanoparticles of the electrode catalyst. The electrode catalyst may be used in a membrane electrode assembly for a fuel cell.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: December 14, 2010
    Assignee: Los Alamos National Security, LLC
    Inventors: Jong-Ho Choi, Piotr Zelenay, Andrzej Wieckowski, Dianxue Cao
  • Chalcogen catalysts for polymer electrolyte fuel cell
    Patent number: 7781364
    Abstract: A methanol-tolerant cathode catalyst and a membrane electrode assembly for fuel cells that includes such a cathode catalyst. The cathode catalyst includes a support having at least one transition metal in elemental form and a chalcogen disposed on the support. Methods of making the cathode catalyst and membrane electrode assembly are also described.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: August 24, 2010
    Assignee: Los Alamos National Security, LLC
    Inventors: Piotr Zelenay, Jong-Ho Choi, Nicolas Alonso-Vante, Andrzej Wieckowski, Dianxue Cao
  • CHALCOGEN CATALYSTS FOR POLYMER ELECTROLYTE FUEL CELL
    Publication number: 20100003569
    Abstract: A methanol-tolerant cathode catalyst and a membrane electrode assembly for fuel cells that includes such a cathode catalyst. The cathode catalyst includes a support having at least one transition metal in elemental form and a chalcogen disposed on the support. Methods of making the cathode catalyst and membrane electrode assembly are also described.
    Type: Application
    Filed: August 5, 2009
    Publication date: January 7, 2010
    Applicant: LOS ALAMOS NATIONAL SECURITY, LLC
    Inventors: Nicolas Alonso-Vante, Andrzej Wieckowski, Dianxue Cao, Piotr Zelenay, Jong-Ho Choi
  • Chalcogen catalysts for polymer electrolyte fuel cell
    Patent number: 7588857
    Abstract: A methanol-tolerant cathode catalyst and a membrane electrode assembly for fuel cells that includes such a cathode catalyst. The cathode catalyst includes a support having at least one transition metal in elemental form and a chalcogen disposed on the support. Methods of making the cathode catalyst and membrane electrode assembly are also described.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: September 15, 2009
    Assignee: Los Alamos National Security, LLC
    Inventors: Nicolas Alonso-Vante, Piotr Zelenay, Jong-Ho Choi, Andrzej Wieckowski, Dianxue Cao
  • Method of making chalcogen catalysts for polymer electrolyte fuel cells
    Publication number: 20070281852
    Abstract: A method of making an electrode catalyst material using aqueous solutions. The electrode catalyst material includes a support comprising at least one transition metal and at least one chalcogen disposed on a surface of the transition metal. The method includes reducing a metal powder, mixing the metal powder with an aqueous solution containing at least one inorganic compound of the chalcogen to form a mixture, and providing a reducing agent to the mixture to form nanoparticles of the electrode catalyst. The electrode catalyst may be used in a membrane electrode assembly for a fuel cell.
    Type: Application
    Filed: May 31, 2006
    Publication date: December 6, 2007
    Inventors: Jong-Ho Choi, Piotr Zelenay, Andrzej Wieckowski, Dianxue Cao
  • Chalcogen catalysts for polymer electrolyte fuel cell
    Publication number: 20070128501
    Abstract: A methanol-tolerant cathode catalyst and a membrane electrode assembly for fuel cells that includes such a cathode catalyst. The cathode catalyst includes a support having at least one transition metal in elemental form and a chalcogen disposed on the support. Methods of making the cathode catalyst and membrane electrode assembly are also described.
    Type: Application
    Filed: December 5, 2005
    Publication date: June 7, 2007
    Inventors: Nicolas Alonso-Vante, Piotr Zelenay, Jong-Ho Choi, Andrzej Wieckowski, Dianxue Cao