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    Platinum-Coated Non-Noble Metal-Noble Metal Core-Shell Electrocatalysts
    1.
    发明申请
    Platinum-Coated Non-Noble Metal-Noble Metal Core-Shell Electrocatalysts 有权
    铂金涂层非贵金属 - 贵金属芯壳电催化剂

    公开(公告)号：US20100197490A1

    公开(公告)日：2010-08-05

    申请号：US12708226

    申请日：2010-02-18

    申请人： Radoslav Adzic ,  Junliang Zhang ,  Yibo Mo ,  Miomir Vukmirovic

    发明人： Radoslav Adzic ,  Junliang Zhang ,  Yibo Mo ,  Miomir Vukmirovic

    IPC分类号： B01J23/42 ,  B01J23/89

    CPC分类号： H01M4/921 ,  B01J23/44 ,  B01J35/0013 ,  B82Y30/00 ,  H01M4/8657 ,  H01M4/926 ,  H01M4/928 ,  H01M2008/1095 ,  Y02E60/50

    摘要： Core-shell particles encapsulated by a thin film of a catalytically active metal are described. The particles are preferably nanoparticles comprising a non-noble core with a noble metal shell which preferably do not include Pt. The non-noble metal-noble metal core-shell nanoparticles are encapsulated by a catalytically active metal which is preferably Pt. The core-shell nanoparticles are preferably formed by prolonged elevated-temperature annealing of nanoparticle alloys in an inert environment. This causes the noble metal component to surface segregate and form an atomically thin shell. The Pt overlayer is formed by a process involving the underpotential deposition of a monolayer of a non-noble metal followed by immersion in a solution comprising a Pt salt. A thin Pt layer forms via the galvanic displacement of non-noble surface atoms by more noble Pt atoms in the salt. The overall process is a robust and cost-efficient method for forming Pt-coated non-noble metal-noble metal core-shell nanoparticles.

    摘要翻译： 描述了由催化活性金属的薄膜包封的核 - 壳颗粒。 颗粒优选是纳米颗粒，其包含优选不包括Pt的贵金属壳的非贵重核。 非贵金属 - 贵金属核 - 壳纳米颗粒被优选Pt的催化活性金属包囊。 核 - 壳纳米颗粒优选通过纳米颗粒合金在惰性环境中的延长的高温退火来形成。 这使得贵金属组分表面分离并形成原子薄的壳。 Pt覆盖层通过涉及非贵金属的单层的潜在不良沉积，然后浸入包含Pt盐的溶液中的方法形成。 通过在盐中更贵的Pt原子通过非贵重表面原子的电位置形成薄的Pt层。 整个过程是用于形成Pt涂覆的非贵金属贵金属核 - 壳纳米颗粒的鲁棒且成本有效的方法。

    Platinum- and platinum alloy-coated palladium and palladium alloy particles and uses thereof
    3.
    发明申请
    Platinum- and platinum alloy-coated palladium and palladium alloy particles and uses thereof 有权
    铂和铂合金涂层的钯和钯合金颗粒及其用途

    公开(公告)号：US20060135359A1

    公开(公告)日：2006-06-22

    申请号：US11019759

    申请日：2004-12-22

    申请人： Radoslav Adzic ,  Junliang Zhang ,  Yibo Mo ,  Miomir Vukmirovic

    发明人： Radoslav Adzic ,  Junliang Zhang ,  Yibo Mo ,  Miomir Vukmirovic

    IPC分类号： H01M8/00 ,  B32B5/16

    CPC分类号： H01M4/928 ,  B01J23/44 ,  B01J35/0013 ,  H01M4/8657 ,  H01M4/921 ,  H01M4/926 ,  H01M2008/1095 ,  Y10T428/2991

    摘要： The present invention relates to particle and nanoparticle composites useful as oxygen-reduction electrocatalysts. The particle composites are composed of a palladium or palladium-alloy particle or nanoparticle substrate coated with an atomic submonolayer, monolayer, bilayer, or trilayer of zerovalent platinum atoms. The invention also relates to a catalyst and a fuel cell containing the particle or nanoparticle composites of the invention. The invention additionally includes methods for oxygen reduction and production of electrical energy by using the particle and nanoparticle composites of the invention.

    摘要翻译： 本发明涉及用作氧还原电极催化剂的颗粒和纳米颗粒复合材料。 颗粒复合材料由涂覆有原子亚单层，单层，双层或零价铂原子的三层的钯或钯合金颗粒或纳米颗粒基材组成。 本发明还涉及含有本发明的颗粒或纳米颗粒复合材料的催化剂和燃料电池。 本发明还包括通过使用本发明的颗粒和纳米颗粒复合材料来氧还原和产生电能的方法。

    Platinum-coated non-noble metal-noble metal core-shell electrocatalysts
    6.
    发明授权
    Platinum-coated non-noble metal-noble metal core-shell electrocatalysts 有权
    铂包覆非贵金属贵金属核壳电极催化剂

    公开(公告)号：US09005331B2

    公开(公告)日：2015-04-14

    申请号：US12708226

    申请日：2010-02-18

    申请人： Radoslav Adzic ,  Junliang Zhang ,  Yibo Mo ,  Miomir Vukmirovic

    发明人： Radoslav Adzic ,  Junliang Zhang ,  Yibo Mo ,  Miomir Vukmirovic

    IPC分类号： B01J23/44 ,  H01M4/92 ,  B82Y30/00 ,  H01M4/86 ,  B01J35/00 ,  H01M8/10

    CPC分类号： H01M4/921 ,  B01J23/44 ,  B01J35/0013 ,  B82Y30/00 ,  H01M4/8657 ,  H01M4/926 ,  H01M4/928 ,  H01M2008/1095 ,  Y02E60/50

    摘要： Core-shell particles encapsulated by a thin film of a catalytically active metal are described. The particles are preferably nanoparticles comprising a non-noble core with a noble metal shell which preferably do not include Pt. The non-noble metal-noble metal core-shell nanoparticles are encapsulated by a catalytically active metal which is preferably Pt. The core-shell nanoparticles are preferably formed by prolonged elevated-temperature annealing of nanoparticle alloys in an inert environment. This causes the noble metal component to surface segregate and form an atomically thin shell. The Pt overlayer is formed by a process involving the underpotential deposition of a monolayer of a non-noble metal followed by immersion in a solution comprising a Pt salt. A thin Pt layer forms via the galvanic displacement of non-noble surface atoms by more noble Pt atoms in the salt. The overall process is a robust and cost-efficient method for forming Pt-coated non-noble metal-noble metal core-shell nanoparticles.

    摘要翻译： 描述了由催化活性金属的薄膜包封的核 - 壳颗粒。 颗粒优选是纳米颗粒，其包含优选不包括Pt的贵金属壳的非贵重核。 非贵金属 - 贵金属核 - 壳纳米颗粒被优选Pt的催化活性金属包囊。 核 - 壳纳米颗粒优选通过纳米颗粒合金在惰性环境中的延长的高温退火来形成。 这使得贵金属组分表面分离并形成原子薄的壳。 Pt覆盖层通过涉及非贵金属的单层的潜在不良沉积，然后浸入包含Pt盐的溶液中的方法形成。 通过在盐中更贵的Pt原子通过非贵重表面原子的电位置形成薄的Pt层。 整个过程是用于形成Pt涂覆的非贵金属贵金属核 - 壳纳米颗粒的鲁棒且成本有效的方法。

    APPARATUS AND METHOD FOR THE SYNTHESIS AND TREATMENT OF METAL MONOLAYER ELECTROCATALYST PARTICLES IN BATCH OR CONTINUOUS FASHION
    10.
    发明申请
    APPARATUS AND METHOD FOR THE SYNTHESIS AND TREATMENT OF METAL MONOLAYER ELECTROCATALYST PARTICLES IN BATCH OR CONTINUOUS FASHION 审中-公开
    金属单层电解质颗粒在批次或连续时间中的合成和处理的装置和方法

    公开(公告)号：US20130056359A1

    公开(公告)日：2013-03-07

    申请号：US13636192

    申请日：2011-03-24

    申请人： Radoslav Adzic ,  Miomir Vukmirovic

    发明人： Radoslav Adzic ,  Miomir Vukmirovic

    IPC分类号： C25D7/00 ,  C25D5/04 ,  C25D17/16

    CPC分类号： H01M4/8853 ,  C23C18/54 ,  C25D5/08 ,  C25D7/006 ,  C25D15/00 ,  C25D17/10 ,  C25D17/12 ,  C25D21/10 ,  C25D21/12

    摘要： An apparatus and method for the synthesis and treatment of electrocatalyst particles in batch or continuous fashion is provided. In one embodiment, the apparatus is comprised of a three-electrode cell which includes a reference electrode, a counter electrode, and a working electrode. The working electrode is preferably a cylindrical vessel having an electrically conductive region. The electrode assembly is introduced into a slurry containing metal ions and a plurality of particles. During operation an electrical potential is applied and the working electrode is rotated at a predetermined speed. When particles in the slurry collide with the electrically conductive region the transferred charge facilitates deposition of an ad-layer of the desired metal. In this manner film growth can commence on a large number of particles simultaneously. This process is especially suitable as a commercial thin film deposition process for forming catalytically active layers on nanoparticles for use in energy conversion devices.

    摘要翻译： 提供了以批次或连续方式合成和处理电催化剂颗粒的装置和方法。 在一个实施例中，该装置由包括参考电极，对电极和工作电极的三电极单元组成。 工作电极优选为具有导电区域的圆筒形容器。 将电极组件引入含有金属离子和多个颗粒的浆料中。 在操作期间，施加电位并且工作电极以预定速度旋转。 当浆料中的颗粒与导电区域碰撞时，转移的电荷促进所需金属的ad层的沉积。 以这种方式，膜生长可以同时在大量的颗粒上开始。 该方法特别适用于在能量转换装置中用于在纳米颗粒上形成催化活性层的商业薄膜沉积方法。