公开(公告)号：US06518217B2

公开(公告)日：2003-02-11

申请号：US09932048

申请日：2001-08-17

申请人： Wei Xing ,  Rongbing Du ,  Tianhong Lu

发明人： Wei Xing ,  Rongbing Du ,  Tianhong Lu

IPC分类号： B01J2713

CPC分类号： H01M4/926 ,  B01J21/18 ,  B01J23/40 ,  B01J23/42 ,  B01J35/10 ,  B01J37/0203 ,  H01M4/921 ,  H01M8/1009 ,  Y02P70/56

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.

摘要翻译： 本发明涉及质子交换膜燃料电池用纳米电催化剂的制备方法，其特征在于包括以下步骤：1）在水中加入铂卤素化合物或铂卤素化合物与钌卤化合物和活性炭的混合物， 溶液中贵金属的含量为0.5〜10g / L，活性炭的含量为0.05〜2g / L， 2）用氢氧化钾和/或氢氧化铵将溶液的pH调节至2.5-10.5; 3）将贵金属的摩尔量超过2.5〜5倍的还原剂滴加到还原反应中， 4）过滤掉液体并洗涤残留物; 和6）干燥残余物。 本发明制备的催化剂在4±0.5nm的范围内具有均匀的粒度，并具有优异的电化学性能。