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    Synthesis of PtCo nanoparticles
    1.
    发明授权
    Synthesis of PtCo nanoparticles 有权
    PtCo纳米粒子的合成

    公开(公告)号：US08110021B2

    公开(公告)日：2012-02-07

    申请号：US12359494

    申请日：2009-01-26

    申请人： Chuan-Jian Zhong ,  Jin Luo ,  Zhichaun Xu ,  Ting He

    发明人： Chuan-Jian Zhong ,  Jin Luo ,  Zhichaun Xu ,  Ting He

    IPC分类号： B22F9/18

    CPC分类号： B22F1/0018 ,  B22F9/24 ,  B82Y30/00 ,  C22B11/04 ,  Y10S977/896

    摘要： Synthesis of nanoparticles with particle size control is provided by the method of using two different metal-containing precursors, a capping component, an optional reducing agent, and then contacting the two precursors with the capping component to form a reaction solution, which is heated to produce first and second metals-containing nanoparticles. By controlling the ratio of the concentration of the capping component to the total concentration of the two metal-containing precursors, the nanoparticles can have diameters ranging between about 1 nm to about 15 nm. A decrease in the concentration of the capping component typically increases the size of the nanoparticles. Preferred compositions include Pt and Co-containing alloy nanoparticles. Controlled synthesis of larger, about 6 nm to about 12 nm, sized nanoparticles can be achieved in a solvent-free reaction process.

    摘要翻译： 通过使用两种不同的含金属前体，封端组分，任选的还原剂，然后使两种前体与封端组分接触以形成反应溶液，将其加热至 产生第一和第二含金属的纳米颗粒。 通过控制封盖组分的浓度与两种含金属前体的总浓度的比例，纳米颗粒的直径可以在约1nm至约15nm之间。 封端组分的浓度的降低通常增加了纳米颗粒的尺寸。 优选的组合物包括Pt和含Co合金纳米颗粒。 可以在无溶剂反应过程中实现更大的约6nm至约12nm尺寸的纳米颗粒的受控合成。

    Synthesis of PtCo Nanoparticles
    2.
    发明申请
    Synthesis of PtCo Nanoparticles 有权
    PtCo纳米粒子的合成

    公开(公告)号：US20100018346A1

    公开(公告)日：2010-01-28

    申请号：US12359494

    申请日：2009-01-26

    申请人： Chuan-Jian Zhong ,  Jin Luo ,  Zhichaun Xu ,  Ting He

    发明人： Chuan-Jian Zhong ,  Jin Luo ,  Zhichaun Xu ,  Ting He

    IPC分类号： B22F9/20

    CPC分类号： B22F1/0018 ,  B22F9/24 ,  B82Y30/00 ,  C22B11/04 ,  Y10S977/896

    摘要： Synthesis of nanoparticles with particle size control is provided by the method of using two different metal-containing precursors, a capping component, an optional reducing agent, and then contacting the two precursors with the capping component to form a reaction solution, which is heated to produce first and second metals-containing nanoparticles. By controlling the ratio of the concentration of the capping component to the total concentration of the two metal-containing precursors, the nanoparticles can have diameters ranging between about 1 nm to about 15 nm. A decrease in the concentration of the capping component typically increases the size of the nanoparticles. Preferred compositions include Pt and Co-containing alloy nanoparticles. Controlled synthesis of larger, about 6 nm to about 12 nm, sized nanoparticles can be achieved in a solvent-free reaction process.

    摘要翻译： 通过使用两种不同的含金属前体，封端组分，任选的还原剂，然后使两种前体与封端组分接触以形成反应溶液，将其加热至 产生第一和第二含金属的纳米颗粒。 通过控制封盖组分的浓度与两种含金属前体的总浓度的比例，纳米颗粒的直径可以在约1nm至约15nm之间。 封端组分的浓度的降低通常增加了纳米颗粒的尺寸。 优选的组合物包括Pt和含Co合金纳米颗粒。 可以在无溶剂反应过程中实现更大的约6nm至约12nm尺寸的纳米颗粒的受控合成。

    Core-shell synthesis of carbon-supported alloy nanoparticle catalysts
    4.
    发明授权
    Core-shell synthesis of carbon-supported alloy nanoparticle catalysts 有权
    碳载合金纳米颗粒催化剂的核壳合成

    公开(公告)号：US07053021B1

    公开(公告)日：2006-05-30

    申请号：US10830986

    申请日：2004-04-22

    申请人： Chuan-Jian Zhong ,  Jin Luo ,  Mathew M. Maye ,  Li Han ,  Nancy N. Kariuki ,  Ting He

    发明人： Chuan-Jian Zhong ,  Jin Luo ,  Mathew M. Maye ,  Li Han ,  Nancy N. Kariuki ,  Ting He

    IPC分类号： B01J21/18 ,  B01J23/74 ,  B01J23/40 ,  B22F1/00 ,  B22F9/00

    CPC分类号： B22F1/0018 ,  B22F9/24 ,  B82Y30/00

    摘要： There is provided a method of preparing carbon supported, ternary alloy composition core-shell PtVFe nanoparticles for use as fuel cell electrocatalysts. These catalysts have been found particularly useful for oxygen reduction reactions. The alloy nanoparticles can be assembled on carbon supports which then may undergo subsequent activation and/or calcination treatments. The method, combined with new synthetic feed and processing conditions, provides core-shell PtVFe alloy nanoparticles of 1–3 nm size. The catalyst-produced high monodispersity, controlled composition are highly dispersed, and have a uniform distribution. Finally, the correlation of the preparation and treatment parameters to the ORR catalytic activities of the prepared nanoparticles is described. The catalysts exhibit ORR in the range of 2 to 4 times more than a standard Pt/carbon catalyst.

    摘要翻译： 提供了一种制备碳负载的三元合金组成的核 - 壳PtVFe纳米粒子作为燃料电池电催化剂的方法。 已经发现这些催化剂对氧还原反应特别有用。 合金纳米颗粒可以组装在碳载体上，然后可以进行随后的活化和/或煅烧处理。 该方法结合新的合成进料和加工条件，提供1-3nm大小的核 - 壳PtVFe合金纳米粒子。 催化剂生产的高分散度，受控组成高度分散，分布均匀。 最后，描述了制备和处理参数与制备的纳米颗粒的ORR催化活性的相关性。 催化剂表现出比标准Pt /碳催化剂高2至4倍的ORR。

    Method of forming iron oxide core metal shell nanoparticles
    7.
    发明授权
    Method of forming iron oxide core metal shell nanoparticles 有权
    形成氧化铁芯金属壳纳米颗粒的方法

    公开(公告)号：US07829140B1

    公开(公告)日：2010-11-09

    申请号：US11391883

    申请日：2006-03-29

    申请人： Chuan-Jian Zhong ,  Lingyan Wang ,  Jin Luo

    发明人： Chuan-Jian Zhong ,  Lingyan Wang ,  Jin Luo

    IPC分类号： B05D7/00

    CPC分类号： A61K49/1839 ,  A61K49/183 ,  B01J23/8906 ,  B01J35/0013 ,  B01J35/008 ,  B82Y5/00 ,  B82Y30/00 ,  C01G49/06 ,  C01G49/08 ,  C01P2002/72 ,  C01P2002/84 ,  C01P2004/04 ,  C01P2004/51 ,  C01P2004/52 ,  C01P2004/64 ,  C01P2006/42 ,  C09C1/24

    摘要： A method of forming mono-disperse iron-oxide core metal shell nanoparticles is disclosed. Particle size of the oxide core seeds is controlled and capped seeds are formed. The capping layer is desorbed by a thermally activated process and metal such as gold is chemically deposited on the core seeds in situ. This process can be repeated to produce multi-metal or different metal shells. A second capping layer is applied on the core/shell composite nanoparticles. In another step, the particles are sized by centrifuging to obtain a tightly controlled and narrow particle size distribution. The water-dispersibility of the particles is achieved by a thiol exchange reaction on the gold shell of the core/shell nanoparticles or by deposition of gold on ferritin-derived iron oxide cores in aqueous solution. Mono and multilayer thin films are assembled on different substrates using the core/shell particles and linking molecules.

    摘要翻译： 公开了形成单分散铁氧化物芯金属壳纳米颗粒的方法。 控制氧化核心种子的粒径并形成封盖的种子。 封盖层通过热激活过程解吸，并且诸如金的金属原位化学沉积在核心种子上。 可以重复该过程以产生多金属或不同的金属壳。 在核/壳复合纳米颗粒上施加第二盖层。 在另一个步骤中，颗粒通过离心来定尺寸以获得严格控制和窄的粒度分布。 颗粒的水分散性通过在核/壳纳米颗粒的金壳上的硫醇交换反应或通过在水溶液中在铁蛋白衍生的氧化铁芯上沉积金来实现。 使用核/壳颗粒和连接分子将单层和多层薄膜组装在不同的基底上。

    SUPPORTED CATALYST
    8.
    发明申请
    SUPPORTED CATALYST 有权
    支持催化剂

    公开(公告)号：US20120190536A1

    公开(公告)日：2012-07-26

    申请号：US13498665

    申请日：2009-12-17

    申请人： Chuan-Jian Zhong ,  Brigid Wanjala ,  Jin Luo ,  Peter N. Njoki ,  Rameshwori Loukrakpam ,  Minhua Shao ,  Lesia V. Protsailo ,  Tetsuo Kawamura

    发明人： Chuan-Jian Zhong ,  Brigid Wanjala ,  Jin Luo ,  Peter N. Njoki ,  Rameshwori Loukrakpam ,  Minhua Shao ,  Lesia V. Protsailo ,  Tetsuo Kawamura

    IPC分类号： B01J21/18 ,  B01J37/08 ,  B82Y30/00 ,  B82Y40/00

    CPC分类号： H01M4/921 ,  B01J21/18 ,  B01J21/185 ,  H01M4/9083 ,  H01M4/926 ,  Y02E60/50

    摘要： A supported catalyst is prepared by a process that includes establishing shell-removal conditions for a supported catalyst intermediate that includes capped nanoparticles of a catalyst material dispersed on a carbon support. The capped nanoparticles each include a platinum alloy core capped in an organic shell. The shell-removal conditions include an elevated temperature and an inert gas atmosphere that is substantially free of oxygen. The organic shell is removed from the platinum alloy core under the shell-removal conditions to limit thermal decomposition of the carbon support and thereby limit agglomeration of the catalyst material such that the supported catalyst includes an electrochemical surface area of at least 30 m2/g Pt.

    摘要翻译： 载体催化剂通过包括建立负载催化剂中间体的壳去除条件的方法制备，所述载体催化剂中间体包括分散在碳载体上的催化剂材料的封端纳米颗粒。 封盖的纳米颗粒各自包括封装在有机壳中的铂合金芯。 脱壳条件包括升高的温度和基本上不含氧的惰性气体气氛。 在除壳条件下从铂合金芯中除去有机壳以限制碳载体的热分解，从而限制催化剂材料的附聚，使得负载催化剂包括至少30m 2 / g Pt的电化学表面积 。

    Controlled synthesis of highly monodispersed gold nanoparticles
    9.
    发明申请
    Controlled synthesis of highly monodispersed gold nanoparticles 有权
    高度单分散金纳米颗粒的控制合成

    公开(公告)号：US20070125196A1

    公开(公告)日：2007-06-07

    申请号：US11176021

    申请日：2005-07-07

    申请人： Chuan-Jian Zhong ,  Peter Njoki ,  Jin Luo

    发明人： Chuan-Jian Zhong ,  Peter Njoki ,  Jin Luo

    IPC分类号： B22F9/24

    CPC分类号： B22F9/24 ,  B22F2998/00 ,  B22F1/0018

    摘要： A method of synthesizing highly monodispersed Au nanoparticles having diameters in the range of 30-90 nm. Seed nanoparticles in a controlled concentration are combined with a precursor, also in a controlled concentration, a reducing and capping agent (e.g., sodium acrylate) in aqueous solution. Under controlled conditions of pH, temperature, and time, highly monodispersed nanoparticles having diameters in the range of 30-100 nm are produced. A relative size standard deviation of the size distribution of the resulting nanoparticles is as low as 2%.

    摘要翻译： 合成直径在30-90nm范围内的高度单分散的Au纳米颗粒的方法。 受控浓度的种子纳米颗粒与水溶液中的还原和封端剂（例如丙烯酸钠）一起控制浓度的前体组合。 在pH，温度和时间的控制条件下，产生直径在30-100nm范围内的高度单分散的纳米颗粒。 所得纳米颗粒的尺寸分布的相对尺寸标准偏差低至2％。