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1.发明授权Method for preparing dispersions of precious metal nanoparticles and for isolating such nanoparticles from said dispersions 有权制备贵金属纳米颗粒的分散体并从所述分散体中分离这些纳米颗粒的方法公开(公告)号：US08529963B2
公开(公告)日：2013-09-10
申请号：US12811985
申请日：2009-01-09
CPC分类号： B01J13/0043 , B22F1/0022 , B22F9/24 , B82Y30/00
摘要： The present invention is directed to a method for preparing colloidal dispersions of precious metal nanoparticles selected from the group consisting of Pt, Au, Pd, Ag, Rh, Ru and mixtures or alloys thereof, and to a method for isolating such precious metal nanoparticles from these colloidal dispersions. The colloidal dispersions are prepared by reducing suitable precious metal precursor compounds in aqueous alkaline solutions at reaction temperatures between 40 and 70° C. and a pH≧12.0 in the presence of polysaccharides with average molecular weights (Mw) in the range of 300,000 to 1,000,000. The precious metal nanoparticles are isolated after decomposing the polysaccharide by heating the colloidal dispersions to temperatures >80° C. The nanoparticles can be used for the manufacture of core/shell-type catalyst materials and for electronic, decorative and medical applications.
摘要翻译： 本发明涉及一种制备选自Pt，Au，Pd，Ag，Rh，Ru及其混合物或合金的贵金属纳米颗粒的胶体分散体的方法，以及用于分离这些贵金属纳米颗粒的方法 这些胶体分散体。 胶体分散体是通过在40〜70℃的反应温度下，在碱性水溶液中还原合适的贵金属前体化合物，在平均分子量（Mw）范围为30万〜 1,000,000。 通过将胶体分散体加热至80℃以上，分解多糖后，分离出贵金属纳米粒子。纳米颗粒可用于制造核/壳型催化剂材料以及电子，装饰和医疗应用。
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2.发明申请Method for preparing dispersions of precious metal nanoparticles and for isolating such nanoparticles from said dispersions 有权制备贵金属纳米颗粒的分散体并从所述分散体中分离这些纳米颗粒的方法公开(公告)号：US20110064825A1
公开(公告)日：2011-03-17
申请号：US12811985
申请日：2009-01-09
IPC分类号： B22F9/24 , A61K33/24 , A61K33/38 , H01B1/02 , B01J31/02 , C09D105/00 , C22C5/04 , C22C5/06 , C22C5/02 , B82Y40/00 , B82Y5/00
CPC分类号： B01J13/0043 , B22F1/0022 , B22F9/24 , B82Y30/00
摘要： The present invention is directed to a method for preparing colloidal dispersions of precious metal nanoparticles selected from the group consisting of Pt, Au, Pd, Ag, Rh, Ru and mixtures or alloys thereof, and to a method for isolating such precious metal nanoparticles from these colloidal dispersions. The colloidal dispersions are prepared by reducing suitable precious metal precursor compounds in aqueous alkaline solutions at reaction temperatures between 40 and 70° C. and a pH≧12.0 in the presence of polysaccharides with average molecular weights (Mw) in the range of 300,000 to 1,000,000. The precious metal nanoparticles are isolated after decomposing the polysaccharide by heating the colloidal dispersions to temperatures >80° C. The nanoparticles can be used for the manufacture of core/shell-type catalyst materials and for electronic, decorative and medical applications.
摘要翻译： 本发明涉及一种制备选自Pt，Au，Pd，Ag，Rh，Ru及其混合物或合金的贵金属纳米颗粒的胶体分散体的方法，以及用于分离这些贵金属纳米颗粒的方法 这些胶体分散体。 胶体分散体是通过在反应温度在40-70℃之间的碱性水溶液中还原合适的贵金属前体化合物，在平均分子量（Mw）在30万至1,000,000范围内的多糖存在下的pH≥12.0来制备的 。 通过将胶体分散体加热至80℃以上，分解多糖后，分离出贵金属纳米粒子。纳米颗粒可用于制造核/壳型催化剂材料以及电子，装饰和医疗应用。
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公开(公告)号：US20130323115A1
公开(公告)日：2013-12-05
申请号：US13327110
申请日：2011-12-15
申请人： Dan V. Goia , Brendan P. Farrell
发明人： Dan V. Goia , Brendan P. Farrell
CPC分类号： B22F1/0044 , B22F1/0018 , B22F9/24 , B22F2001/0033 , B82Y30/00 , C22B5/00 , C22B11/04 , C22C5/06 , Y10S977/81 , Y10T428/12021 , Y10T428/2982
摘要： The present invention provides an aqueous solution-based method for producing nano-sized silver platelets, which employs the controlled mixing of a silver ion solution, a reducing solution, and an acidic solution, under suitable conditions. Also provided are the silver platelets produced thereby, and compositions containing the silver platelets.
摘要翻译： 本发明提供一种用于制备纳米尺寸银片的水溶液型方法，其在合适的条件下采用银离子溶液，还原溶液和酸性溶液的受控混合。 还提供了由此制备的银血小板和含有银血小板的组合物。
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公开(公告)号：US08084140B2
公开(公告)日：2011-12-27
申请号：US11913284
申请日：2006-12-01
申请人： Dan V. Goia , Brendan P. Farrell
发明人： Dan V. Goia , Brendan P. Farrell
CPC分类号： B22F1/0044 , B22F1/0018 , B22F9/24 , B22F2001/0033 , B82Y30/00 , C22B5/00 , C22B11/04 , C22C5/06 , Y10S977/81 , Y10T428/12021 , Y10T428/2982
摘要： The invention provides an aqueous solution-based method for producing nanosized silver platelets, which employs the controlled mixing of a silver ion solution, a reducing solution, and an acidic solution in the presence of palladium ions.
摘要翻译： 本发明提供了一种用于制备纳米银银片的基于水溶液的方法，其在钯离子的存在下采用银离子溶液，还原溶液和酸性溶液的受控混合。
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公开(公告)号：US20080213592A1
公开(公告)日：2008-09-04
申请号：US11913284
申请日：2006-12-01
申请人： Dan V. Goia , Brendan P. Farrell
发明人： Dan V. Goia , Brendan P. Farrell
IPC分类号： B32B15/02
CPC分类号： B22F1/0044 , B22F1/0018 , B22F9/24 , B22F2001/0033 , B82Y30/00 , C22B5/00 , C22B11/04 , C22C5/06 , Y10S977/81 , Y10T428/12021 , Y10T428/2982
摘要： The invention provides an aqueous solution-based method for producing nanosized silver platelets, which employs the controlled mixing of a silver ion solution, a reducing solution, and an acidic solution in the presence of palladium ions.
摘要翻译： 本发明提供了一种用于制备纳米银银片的基于水溶液的方法，其在钯离子的存在下采用银离子溶液，还原溶液和酸性溶液的受控混合。
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公开(公告)号：US08304362B2
公开(公告)日：2012-11-06
申请号：US12438978
申请日：2007-08-27
IPC分类号： H01M4/88 , H01M4/02 , H01M4/36 , H01M4/90 , H01M4/92 , H01M4/94 , B21D51/16 , B01D53/34 , B01J21/18 , B01J23/00 , B01J23/40 , B01J23/74 , B32B27/02 , B32B5/16 , B32B15/02 , B32B17/02 , B32B19/02 , B32B21/02 , B32B23/02
CPC分类号： B22F1/025 , B22F1/0018 , B22F2998/00 , B82Y30/00 , H01M4/8605 , H01M4/8842 , H01M4/921 , H01M4/926 , H01M8/1007 , Y10T29/49345 , Y10T428/2991 , B22F9/24
摘要： The invention discloses core/shell type catalyst particles comprising a Mcore/Mshell structure with Mcore=inner particle core and Mshell=outer particle shell, wherein the medium diameter of the catalyst particle (dcore+shell) is in the range of 20 to 100 nm, preferably in the range of 20 to 50 nm. The thickness of the outer shell (tshell) is about 5 to 20% of the diameter of the inner particle core of said catalyst particle, preferably comprising at least 3 atomic layers. The core/shell type catalyst particles, particularly the particles comprising a Pt-based shell, reveal a high specific activity. The catalyst particles are preferably supported on suitable support materials such as carbon black and are used as electrocatalysts for fuel cells.
摘要翻译： 本发明公开了包含Mcore / Mshell结构的核/壳型催化剂颗粒，其中Mcore =内颗粒核和Mshell =外颗粒壳，其中催化剂颗粒（dcore +壳）的介质直径在20至100nm的范围内 ，优选在20〜50nm的范围内。 外壳的厚度（tshell）为所述催化剂颗粒的内颗粒芯的直径的约5至20％，优选包含至少3个原子层。 核/壳型催化剂颗粒，特别是包含Pt基壳的颗粒显示高的比活性。 催化剂颗粒优选负载在合适的载体材料如炭黑上，并用作燃料电池的电催化剂。
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公开(公告)号：US07459007B2
公开(公告)日：2008-12-02
申请号：US11080192
申请日：2005-03-15
申请人： Dan V. Goia , Corina Goia
发明人： Dan V. Goia , Corina Goia
IPC分类号： B22F9/04
CPC分类号： B22F9/04 , B22F1/0055
摘要： The present invention provides a metallic composition, which includes a plurality of ultra-fine copper flakes having at least one desirable feature, such as oxidation resistance and excellent dispersibility in a non-aqueous system. Also provided is a method for forming compositions having a plurality of ultra-fine copper flakes, and the metallic composition produced therewith.
摘要翻译： 本发明提供了一种金属组合物，其包括多个具有至少一种所需特征的超细铜薄片，例如耐氧化性和非水系统中优异的分散性。 还提供了一种用于形成具有多个超细铜薄片的组合物的方法和由其制备的金属组合物。
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8.发明授权Method for manufacture of noble metal alloy catalysts and catalysts prepared therewith 有权制备贵金属合金催化剂的方法及其制备的催化剂公开(公告)号：US08273504B2
公开(公告)日：2012-09-25
申请号：US13223750
申请日：2011-09-01
IPC分类号： B01J23/00 , B01J23/40 , B01J23/42 , B01J23/44 , B01J21/18 , H01M4/02 , H01M4/36 , H01M4/90 , H01M4/92 , H01M4/94
CPC分类号： B82Y30/00 , B01D53/944 , B01D2255/1021 , B01D2255/1026 , B01D2255/106 , B01D2255/20746 , B01D2255/9202 , B01D2257/502 , B01J21/18 , B01J23/40 , B01J23/462 , B01J23/52 , B01J23/8913 , B01J35/0013 , B01J35/006 , B01J37/0072 , B01J37/0211 , B01J37/088 , B22F9/24 , B22F2998/00 , H01M4/921 , H01M4/926 , B22F2303/01 , B22F2301/25 , B22F2303/05 , B22F2301/15
摘要： The invention provides a method for manufacturing supported noble metal based alloy catalysts with a high degree of alloying and a small crystallite size. The method involves using polyol solvents as reaction medium and comprises a two-step reduction process in the presence of a support material. In the first step, the first metal (transition metal; e.g. Co, Cr, Ru) is activated by increasing the reaction temperature to 80 to 160° C. In the second step, the second metal (noble metal; e.g. Pt, Pd, Au) is added and the slurry is heated to the boiling point of the polyol solvent in a range of 160 to 300 ° C. The catalysts manufactured according to the method are used as electrocatalysts for polymer electrolyte membrane fuel cells (PEMFC), direct-methanol fuel cells (DMFC) or as gas phase catalysts for CO oxidation or exhaust gas purification.
摘要翻译： 本发明提供一种具有高合金化和微晶尺寸的负载型贵金属基合金催化剂的制造方法。 该方法包括使用多元醇溶剂作为反应介质，并且在载体材料存在下包括两步还原方法。 在第一步骤中，第一金属（过渡金属，例如Co，Cr，Ru）通过将反应温度升高至80至160℃而被活化。在第二步中，第二金属（贵金属，例如Pt，Pd， Au），将浆料加热到多元醇溶剂的沸点在160〜300℃的范围内。根据该方法制造的催化剂用作聚合物电解质膜燃料电池（PEMFC）的电极催化剂， 甲醇燃料电池（DMFC）或用于CO氧化或废气净化的气相催化剂。
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公开(公告)号：US5928405A
公开(公告)日：1999-07-27
申请号：US859853
申请日：1997-05-21
CPC分类号： B22F9/02 , B22F9/30 , B22F2998/00
摘要： An economical process and associated hardware for commercial manufacture of controllable submicrometer size metallic powders for electronic and other applications. The method is based on the preparation of a stable high concentration precursor solution, production of a high density aerosol mist of the precursor solutions, selection of mist droplets with upper and lower size bounds, controlled drying of the droplets, their conversion to metallic powder in a high temperature gaseous atmosphere and the separation of the powders from carrier gases without significant loss inside the process hardware.
摘要翻译： 用于电子和其他应用的可控亚微米尺寸金属粉末的商业制造的经济工艺和相关硬件。 该方法是基于稳定的高浓度前体溶液的制备，制备前体溶液的高密度气溶胶雾，选择具有上限和下限界限的雾滴，控制干燥液滴，将其转化为金属粉末 高温气氛和粉末与载气的分离，而在工艺硬件内没有显着的损失。
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公开(公告)号：US20140234220A1
公开(公告)日：2014-08-21
申请号：US14183229
申请日：2014-02-18
申请人： Dan V. Goia , John I. Njagi , Calin V. Pop
发明人： Dan V. Goia , John I. Njagi , Calin V. Pop
CPC分类号： A61K47/6923
摘要： The present disclosure relates to a method for making a gold nanoparticle dispersion. The method includes providing a first solution that has gold ions in a liquid medium, adding NTA molecules to the first solution to form a gold nanoparticle dispersion. When the NTA molecules are added to the first solution, the NTA molecules act as a reducing agent to reduce the gold ions to gold atoms, after which the gold atoms nucleate to form gold nanoparticles. The excess NTA molecules then attach to the surface of the gold nanoparticles to stabilize the dispersion. The present disclosure also relates to a dispersion composition that includes a liquid medium, gold nanoparticles dispersed throughout the liquid medium, and NTA molecules directly coating the gold nanoparticles.
摘要翻译： 本公开涉及一种制备金纳米颗粒分散体的方法。 该方法包括提供在液体介质中具有金离子的第一溶液，将NTA分子加入到第一溶液中以形成金纳米颗粒分散体。 当NTA分子被添加到第一溶液中时，NTA分子用作还原剂以将金离子还原成金原子，之后金原子成核形成金纳米颗粒。 然后过量的NTA分子附着到金纳米颗粒的表面以稳定分散体。 本公开还涉及包含液体介质，分散在整个液体介质中的金纳米颗粒和直接涂覆金纳米颗粒的NTA分子的分散体组合物。
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