公开(公告)号：US20150318560A1

公开(公告)日：2015-11-05

申请号：US14440453

申请日：2012-11-07

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA ,  BALLARD POWER SYSTEMS INC.

发明人： Keiichi KANEKO ,  Naoki TAKEHIRO ,  Takumi TANIGUCHI ,  Tatsuya ARAI ,  Noriyuki KITAO ,  Makoto ADACHI ,  Hiroko KIMURA

IPC分类号： H01M4/92 ,  H01M4/88

CPC分类号： H01M4/925 ,  H01M4/8657 ,  H01M4/8828 ,  H01M4/8878 ,  H01M4/8885 ,  H01M4/921 ,  H01M4/926 ,  H01M2008/1095 ,  Y02E60/50

摘要： An object of the present invention is to provide a production method which can increase the activity of a catalyst particle comprising a core particle and an outermost layer, the core particle comprising at least one of palladium and a palladium alloy, and the outermost layer comprising at least one of platinum and a platinum alloy and covering the core particle. The method is for producing a catalyst for fuel cells, in which a catalyst particle is supported by an electroconductive carrier, the method comprising the steps of: preparing a supported catalyst in which a catalyst particle comprising a core particle and an outermost layer is supported by an electroconductive carrier, the core particle comprising at least one of palladium and a palladium alloy, and the outermost layer comprising at least one of platinum and a platinum alloy and covering the core particle; acid treatment to bring the supported catalyst into contact with an acid solution which dissolves palladium more preferentially than platinum; and firing the supported catalyst at 80° C. or more and less than 200° C. in a reducing gas atmosphere after the acid treatment step.

摘要翻译： 本发明的目的是提供一种可以提高包含核心颗粒和最外层的催化剂颗粒的活性的制备方法，所述核心颗粒包含钯和钯合金中的至少一种，最外层包含在 至少一种铂和铂合金，并覆盖核心颗粒。 该方法用于生产催化剂颗粒由导电载体负载的燃料电池催化剂，该方法包括以下步骤：制备载体催化剂，其中包含核颗粒和最外层的催化剂颗粒由 导电载体，所述芯颗粒包含钯和钯合金中的至少一种，所述最外层包含铂和铂合金中的至少一种并覆盖所述芯颗粒; 使负载型催化剂与比铂更优先溶解钯的酸溶液接触; 在酸处理工序后，在还原气体气氛下，在80℃以上且小于200℃下烧成负载型催化剂。

公开(公告)号：US20170117554A1

公开(公告)日：2017-04-27

申请号：US15302006

申请日：2015-02-13

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Noriyuki KITAO ,  Hiroko KIMURA ,  Makoto ADACHI ,  Keiichi KANEKO

IPC分类号： H01M4/86 ,  H01M4/92

CPC分类号： H01M4/8657 ,  B01J23/44 ,  B01J35/0033 ,  H01M4/8853 ,  H01M4/923 ,  H01M4/926

摘要： The present invention is to provide fine catalyst particles with better catalytic performance than ever before and a carbon-supported catalyst with better catalytic performance than ever before. Disclosed is a method for producing fine catalyst particles, comprising: a potential applying step of applying a potential to the fine palladium-containing particles in a first dispersion, until a peak indicating a Pd{111} surface in a reduction wave of a cyclic voltammogram becomes larger than a peak indicating a Pd{110} or Pd{100} surface in the reduction wave of the cyclic voltammogram; a copper covering step of covering at least part of the fine palladium-containing particle with copper by preparing a second dispersion by mixing the first dispersion and a copper-containing solution after the potential applying step, and applying a potential that is nobler than the oxidation-reduction potential of copper to the fine palladium-containing particles in the second dispersion; and a platinum covering step of covering at least part of the fine palladium-containing particle with platinum by mixing the second dispersion and a platinum-containing solution after the copper covering step.

公开(公告)号：US20160359173A1

公开(公告)日：2016-12-08

申请号：US15117314

申请日：2014-12-22

申请人： Toyota Jidosha Kabushiki Kaisha

发明人： Keiichi KANEKO ,  Hiroko KIMURA ,  Makoto ADACHI

IPC分类号： H01M4/92 ,  C25D3/38 ,  C25D5/48 ,  C23C28/02 ,  C23C18/42 ,  C23C18/18 ,  C23C18/16 ,  H01M4/88 ,  C25D7/00

CPC分类号： H01M4/925 ,  B22F1/025 ,  C23C18/1635 ,  C23C18/1637 ,  C23C18/1648 ,  C23C18/168 ,  C23C18/1689 ,  C23C18/1848 ,  C23C18/42 ,  C23C18/54 ,  C23C28/023 ,  C25D3/38 ,  C25D5/34 ,  C25D5/48 ,  C25D7/00 ,  C25D7/006 ,  H01M4/8657 ,  H01M4/8825 ,  H01M4/8832 ,  H01M4/8853 ,  H01M4/8878 ,  H01M4/921

摘要： The present invention is to provide a method for producing core-shell catalyst particles with high catalytic activity per unit mass of platinum. Disclosed is a method for producing core-shell catalyst particles including a core containing palladium and a shell containing platinum and covering the shell, wherein the method includes: a step of depositing copper on the surface of the palladium-containing particles by applying a potential that is nobler than the oxidation-reduction potential of copper to the palladium-containing particles in a copper ion-containing electrolyte, and a step of forming the shell by, after the copper deposition step and inside the reaction system kept at −3° C. or more and 10° C. or less, substituting the copper deposited on the surface of the palladium-containing particles with platinum by bringing the copper into contact with a platinum ion-containing solution in which platinum ions and a reaction inhibitor that inhibits a substitution reaction between the copper and the platinum, are contained.

摘要翻译： 本发明提供一种生产具有高铂催化活性的核 - 壳催化剂颗粒的方法。 公开了一种生产核 - 壳催化剂颗粒的方法，其包括含有钯和包含铂并包覆壳的壳的芯，其中所述方法包括：通过施加以下方法的一个步骤：在含钯颗粒的表面上沉积铜 比铜对含铜离子的电解质中的含钯颗粒的氧化还原电位更高，并且在铜沉积步骤之后并且在反应体系内部保持在-3℃下形成壳的步骤。 以上且10℃以下，通过使铜与含铂离子和抑制取代的反应抑制剂的含铂离子溶液接触，用铂代替沉积在含钯粒子表面的铜 包含铜和铂之间的反应。