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1
US20170244112A1
Publication/Patent Number: US20170244112A1
Publication date: 2017-08-24
Application number: 15/381,811
Filing date: 2016-12-16
Abstract: Provided are processes for preparing a thermodynamically stable PtBi2 alloy nanoparticle. In certain aspects, the process comprises preparing an aqueous mixture, with the aqueous mixture comprising: an inorganic compound comprising SnCl2; an inorganic compound comprising Bi; and HCl. The process further comprises adding PtCl4 to the mixture. The process results in the spontaneous reduction of Bi and Pt. Excess SnCl2 is adsorbed as a ligand at the surface of the PtB2 alloy nanoparticle, which serves to stabilize the nanoparticle. Another aspect provides a thermodynamically stable PtBi2 nanoparticle. The nanoparticle comprises a core comprising a PtBi2 alloy. The nanoparticle further comprises a shell at least partially encapsulating the core, with the shell comprising stannous chloride. The thermodynamically stable PtB2 nanoparticle has a negative charge. Provided are processes for preparing a thermodynamically stable PtBi2 alloy nanoparticle. In certain aspects, the process comprises preparing an aqueous mixture, with the aqueous mixture comprising: an inorganic compound comprising SnCl2; an inorganic compound comprising Bi; and ...more ...less
2
US8993868B2
Publication/Patent Number: US8993868B2
Publication date: 2015-03-31
Application number: 13/792,205
Filing date: 2013-03-11
Abstract: A musical instrument pickup including an apparatus that allows for easy interchangement of magnets for modifying tone.
3
US20140251117A1
Publication/Patent Number: US20140251117A1
Publication date: 2014-09-11
Application number: 13/792,205
Filing date: 2013-03-11
Abstract: A musical instrument pickup including an apparatus that allows for easy interchangement of magnets for modifying tone.
4
US20100003764A1
Publication/Patent Number: US20100003764A1
Publication date: 2010-01-07
Application number: 12/497,143
Filing date: 2009-07-02
Abstract: An optical sensor for monitoring an environmental condition, the optical sensor comprising a perfluorosulfonate ionomer membrane comprising a solution, wherein the solution comprises a transition metal-free dye component, wherein exposure of the optical sensor to a specific environmental condition produces a color shift on the optical sensor. An optical sensor for monitoring an environmental condition, the optical sensor comprising a perfluorosulfonate ionomer membrane comprising a solution, wherein the solution comprises a transition metal-free dye component, wherein exposure of the optical sensor to a specific ...more ...less
5
US20050084742A1
Publication/Patent Number: US20050084742A1
Publication date: 2005-04-21
Application number: 10/924,317
Filing date: 2004-08-23
Abstract: Favorable performance of diffusion media in fuel cells has found to be correlated to a parameter (the C/F ratio) that relates to a spatial and thickness distribution of the hydrophobic fluoropolymer on the carbon fiber substrate structure of the medium. Suitable diffusion media may be chosen from among commercially coated diffusion media by measuring the C/F ratio by means of energy dispersive spectroscopy, and choosing the diffusion media if the value of the C/F ratio is within the preferred range. Alternatively, the diffusion media may be manufactured with an improved process that consistently yields values of C/F ratio in the desired range. Favorable performance of diffusion media in fuel cells has found to be correlated to a parameter (the C/F ratio) that relates to a spatial and thickness distribution of the hydrophobic fluoropolymer on the carbon fiber substrate structure of the medium. Suitable diffusion media ...more ...less
6
US20050058870A1
Publication/Patent Number: US20050058870A1
Publication date: 2005-03-17
Application number: 10/664,345
Filing date: 2003-09-17
Abstract: A method of addressing one MEA failure mode by controlling MEA catalyst layer overlap, and the apparatus formed thereby is disclosed. The present invention addresses a feature of membrane electrode assembly (MEA) architecture that is associated with field failures due to the loss of ionomer from the edges of the electrolyte. To address ionomer degradation, the present invention provides a MEA design in which the cathode catalyst edges are closer than the anode catalyst edges to the edges of the electrolyte. A method of addressing one MEA failure mode by controlling MEA catalyst layer overlap, and the apparatus formed thereby is disclosed. The present invention addresses a feature of membrane electrode assembly (MEA) architecture that is associated with field failures due to the ...more ...less
7
WO2005041331A1
Publication/Patent Number: WO2005041331A1
Publication date: 2005-05-06
Application number: 2004030568
Filing date: 2004-09-17
Abstract: Favorable performance of diffusion media (34