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    • 5. 发明申请
    • Conductive matrices for fuel cell electrodes
    • 燃料电池电极导电基体
    • US20060251954A1
    • 2006-11-09
    • US11415346
    • 2006-05-01
    • Belabbes MerzouguiIon HalalayMichael CarpenterSwathy Swathirajan
    • Belabbes MerzouguiIon HalalayMichael CarpenterSwathy Swathirajan
    • H01M4/96H01M8/10H01M4/92
    • H01M4/90H01M4/86H01M4/9075H01M4/92H01M4/925H01M8/1004H01M2004/8689H01M2008/1095
    • The durability of a fuel cell having a polymer electrolyte membrane with an anode on one surface and an oxygen-reducing cathode on the other surface is improved by replacing conductive carbon matrix materials in an electrode with a matrix of electrically conductive metal compound particles. The electrode includes a catalyst supported on a nanosize metal oxides and electrically conductive nanosize matrix particles of a metal compound. One or more metal compounds such as a boride, carbide, nitride, silicide, carbonitride, oxyboride, oxycarbide, or oxynitride of a metal such as cobalt, chromium, nickel, molybdenum, neodymium niobium, tantalum, titanium, tungsten, vanadium, and zirconium is suitable. For example, the combination of platinum particles deposited on titanium dioxide support particles mixed in a conductive matrix of titanium carbide particles provides an electrode with good oxygen reduction capability and corrosion resistance in an acid environment.
    • 通过用导电金属化合物颗粒的基体代替电极中的导电性碳基体材料,改善了具有在一个表面上具有阳极的聚合物电解质膜和另一表面上的除氧阴极的燃料电池的耐久性。 电极包括负载在纳米尺寸金属氧化物上的催化剂和金属化合物的导电纳米尺寸基质颗粒。 金属如钴,铬,镍,钼,钕,铌,钽,钛,钨,钒和锆的一种或多种金属化合物,例如硼化物,碳化物,氮化物,硅化物,碳氮化物,氧硼化物,碳氧化物或氧氮化物 适合。 例如,沉积在二氧化钛载体颗粒上的铂颗粒的组合在碳化钛颗粒的导电基质中混合提供了在酸性环境中具有良好的氧还原能力和耐腐蚀性的电极。
    • 9. 发明授权
    • Fuel cell having a stabilized cathode catalyst
    • 具有稳定的阴极催化剂的燃料电池
    • US08389175B2
    • 2013-03-05
    • US12867162
    • 2008-05-16
    • Minhua ShaoBelabbes MerzouguiPatrick L. HagansSusanne M. Opalka
    • Minhua ShaoBelabbes MerzouguiPatrick L. HagansSusanne M. Opalka
    • H01M4/02H01M4/36H01M4/92H01M8/00H01M8/10B01J23/00
    • H01M4/8647H01M4/921H01M8/086H01M8/1007H01M2008/1095Y02E60/521Y10S977/773Y10S977/775
    • A fuel cell (70) having an anode (72), a cathode (78) and an electrolyte (76) between the anode (72) and the cathode (78) includes a cathode catalyst (80) formed of a plurality of nanoparticles. Each nanoparticle (20) has a plurality of terraces (26) formed of platinum surface atoms (14), and a plurality of edge (28) and corner regions (29) formed of atoms from a second metal (30)—The cathode catalyst may be formed by combining a platinum nanoparticle with a metal salt in a solution. Ions from the second metal react with platinum and replace platinum atoms on the nanoparticle. The second metal atoms at the corner and edge regions of the nanoparticle, as well as at any surface defects, result in a more stable catalyst structure. In some embodiments, the fuel cell (70) is a proton exchange membrane fuel cell and the nanoparticles are tetrahedron-shaped. In some embodiments, the fuel cell (70) is a phosphoric acid fuel cell and the nanoparticles are cubic-shaped.
    • 在阳极(72)和阴极(78)之间具有阳极(72),阴极(78)和电解质(76)的燃料电池(70)包括由多个纳米颗粒形成的阴极催化剂(80)。 每个纳米颗粒(20)具有由铂表面原子(14)形成的多个梯田(26),以及由第二金属(30)的原子形成的多个边缘(28)和拐角区域(29)。阴极催化剂 可以通过将铂纳米颗粒与溶液中的金属盐组合而形成。 来自第二金属的离子与铂反应并且替换纳米颗粒上的铂原子。 在纳米颗粒的角落和边缘区域的第二个金属原子以及任何表面缺陷导致更稳定的催化剂结构。 在一些实施例中,燃料电池(70)是质子交换膜燃料电池,并且纳米颗粒是四面体形状。 在一些实施例中,燃料电池(70)是磷酸燃料电池,并且纳米颗粒是立方体形状。
    • 10. 发明授权
    • Stabilized platinum catalyst
    • 稳定的铂催化剂
    • US08304365B2
    • 2012-11-06
    • US12867153
    • 2008-05-16
    • Minhua ShaoBelabbes MerzouguiPatrick L. HagansSusanne M. Opalka
    • Minhua ShaoBelabbes MerzouguiPatrick L. HagansSusanne M. Opalka
    • B01J23/00H01M8/00
    • B01J35/0013B01J23/42B01J23/56B01J37/0226B01J37/347B01J37/348
    • A stabilized platinum nanoparticle has a core portion surrounded by a plurality of outer surfaces. The outer surfaces include terrace regions formed of platinum atoms, and edge and corner regions formed of atoms from a second metal. The stabilized nanoparticle may be formed by combining a platinum nanoparticle with a metal salt in a solution. Ions of the second metal react with platinum and replace platinum atoms on the nanoparticle. Platinum atoms from the edge and corner regions react with the second metal ions quicker than surface atoms from the terraces, due to a greater difference in electrode potential between the platinum atoms at the edge and corner regions, as compared to the second metal in the solution. The platinum nanoparticle may include surface defects, such as steps and kinks, which may also be replaced with atoms of the second metal. In an exemplary embodiment, the platinum nanoparticle is a cathode catalyst in an electro-chemical cell.
    • 稳定的铂纳米颗粒具有由多个外表面包围的芯部分。 外表面包括由铂原子形成的平台区域,以及由第二金属原子形成的边缘和拐角区域。 稳定的纳米颗粒可以通过将铂纳米颗粒与溶液中的金属盐组合而形成。 第二金属的离子与铂反应,并取代纳米颗粒上的铂原子。 由于与溶液中的第二金属相比,在边缘和拐角区域处的铂原子与边缘和角部区域上的铂原子之间的电极电位差异更大,所以来自边缘和角区域的铂原子与第二金属离子比来自梯田的表面原子更快地反应 。 铂纳米颗粒可以包括表面缺陷,例如步骤和扭结,其也可以被第二金属的原子替代。 在示例性实施方案中,铂纳米颗粒是电化学电池中的阴极催化剂。