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    Polymetallic precursors and compositions and methods for making supported polymetallic nanocomposites
    3.
    发明授权
    Polymetallic precursors and compositions and methods for making supported polymetallic nanocomposites 失效
    多金属前体及其制备负载型多金属纳米复合材料的组合物和方法

    公开(公告)号：US06232264B1

    公开(公告)日：2001-05-15

    申请号：US09099556

    申请日：1998-06-18

    申请人： Charles M. Lukehart ,  William D. King ,  Stephen B. Milne ,  Frank E. Jones, III ,  James D. Corn ,  Deborah L. Boxall ,  Krzysztof C. Kwiatkowski

    发明人： Charles M. Lukehart ,  William D. King ,  Stephen B. Milne ,  Frank E. Jones, III ,  James D. Corn ,  Deborah L. Boxall ,  Krzysztof C. Kwiatkowski

    IPC分类号： B01J2342

    CPC分类号： H01M4/9008 ,  B01J23/40 ,  B01J35/0013 ,  B22F9/30 ,  B22F2998/10 ,  B22F2999/00 ,  C07F15/0046 ,  C07F15/0053 ,  C07F15/0086 ,  C07F15/0093 ,  H01M4/926 ,  H01M8/1011 ,  Y02E60/523 ,  B22F9/26 ,  B22F2201/013

    摘要： The present invention relates to methods for preparing polymetallic precursors and for preparing improved nanocomposites formed from such precursors which are useful in fuel cell catalyst compositions. The nanocomposites include a support and a plurality of polymetallic nanoparticles with a selected metal atomic ratio. The metals in the polymetallic precursors have a stoichiometric ratio which is approximately equal to the selected atomic ratio of metals in the nanoparticles such that stoichiometric control is provided for the resulting nanocomposite catalyst. Crystalline intermetallic or metal alloy nanoparticles form when a polymetallic precursor having a particular metal stoichiometry is contacted with a conductive support, and the precursor is thermally degraded on the support leading to retention of the metal core of the precursor on the support. The polymetallic alloy nanoparticles formed have a selected metal atomic ratio which is approximately equal to the stoichiometric ratio of metals in the polymetallic precursor. Fuel cell catalysts comprising such nanocomposites have utility as either anode or cathode fuel cell catalysts, particularly in DMFCs.

    摘要翻译： 本发明涉及用于制备多金属前体的方法和用于制备可用于燃料电池催化剂组合物的由这些前体形成的改进的纳米复合材料的方法。 纳米复合材料包括支撑体和具有选定的金属原子比的多个多金属纳米粒子。 多金属前体中的金属的化学计量比近似等于所选择的纳米颗粒中的金属原子比，从而为所得纳米复合催化剂提供化学计量的对照。 当具有特定金属化学计量的多金属前驱物与导电载体接触时，结晶金属间化合物或金属合金纳米颗粒形成，并且前体在载体上热降解，导致前体金属核保持在载体上。 所形成的多金属合金纳米颗粒具有与金属前体金属的化学计量比近似相等的金属原子比。 包含这种纳米复合材料的燃料电池催化剂可用作阳极或阴极燃料电池催化剂，特别是在DMFC中。

    Complexes of metallated coordination ligands
    5.
    发明授权
    Complexes of metallated coordination ligands 失效
    金属配位配位体的配合物

    公开(公告)号：US4089881A

    公开(公告)日：1978-05-16

    申请号：US741390

    申请日：1976-11-12

    申请人： Charles M. Lukehart

    发明人： Charles M. Lukehart

    IPC分类号： C07F13/00 ,  C08F4/72

    CPC分类号： C08F4/72 ,  C07F13/00

    摘要： The present invention relates to organometallic complexes which contain at least two metal atoms, or a metal atom and a proton, and at least one ligand representing a metallated unsaturated chelating six-membered ring system, where the metallation involves the formal replacement of a methine group by an organometallic complex.The compounds of the invention have utility as both homogeneous and heterogeneous catalysts of hydrogenation, polymerization, isomerization, hydroformylation and metathetical exchange reactions.

    摘要翻译： 本发明涉及含有至少两个金属原子或金属原子和质子的有机金属配合物，以及代表金属化不饱和螯合六元环体系的至少一个配体，其中金属化涉及次甲基的正式置换 通过有机金属络合物。