专利详情

专利名称	Method of preparing of nanometer electrocatalyst for proton exchange membrane fuel cell
申请号	US20010932048	专利类型	US
公开（公告）号	US6518217	公开（授权）日	2003.02.11
申请（专利权）人	中国科学院长春应用化学研究所	发明（设计）人	DU RONGBING (CN); LU TIANHONG (CN); XING WEI (CN)
主分类号	B01J27/13	IPC主分类号	B01J27/13;B01J21/18;B01J27/06;H01M4/88;H01M4/86
专利有效期	Method of preparing of nanometer electrocatalyst for proton exchange membrane fuel cell 至Method of preparing of nanometer electrocatalyst for proton exchange membrane fuel cell	法律状态
说明书摘要	The present invention relates a method for preparing nanometer electrocatalyst for proton exchange membrane fuel cells, comprising the steps of: 1) adding in water a platinum halogen compound or a mixture of a platinum halogen compound and a ruthenium halogen compound, and active carbon, the amount of noble metal in the solution is 0.5-10 g/L, and the amount of active carbon is 0.05-2 g/L; 2) adjusting the pH of the solution to 2.5-10.5 with potassium hydroxide and/or ammonium hydroxide; 3) adding dropwise a reducing agent to an amount of 2.5 to 5 times in excess of that of the noble metal in moles, and allowing the reduction reaction to proceed; 4) filtering off the liquid and washing the remains; and 6) drying the remains. The catalysts prepared by the present invention have uniform particle sizes in the range of 4 0.5 nm, and superior electrochemical properties.