Gm Global Technolgoy Operations, Inc.

University of Cincinnati

Other

Anastasios P Angelopoulos

Scott Lawrence Peters

Jonathan A Bernstein

Mark F Mathias

Chunxin Ji

John P Healy

Clark G Hochgraf

Daniel S Kanter

Subasri M Ayyadurai

Methods for preserving catalytic activity of a PSA polymer membrane in a humid environment by immobilizing in the membrane an organic acid having a pKa greater than the pKa of the PSA polymer membrane; optical sensors based on the PSA membranes further including an immobilized organic reagent capable of reacting with a target compound in a humid environment to produce a detectable color shifted product; and non-invasive methods for estimating blood glucose concentration by utilizing an optical sensor to detect concentration of acetone in exhaled human breath and correlating it to blood glucose concentration.

Water and salt resistant solid super-acid catalysts

Provided are processes for preparing a thermodynamically stable PtBialloy nanoparticle. In certain aspects, the process comprises preparing an aqueous mixture, with the aqueous mixture comprising: an inorganic compound comprising SnClan inorganic compound comprising Bi; and HCl. The process further comprises adding PtClto the mixture. The process results in the spontaneous reduction of Bi and Pt. Excess SnClis adsorbed as a ligand at the surface of the PtBialloy nanoparticle, which serves to stabilize the nanoparticle. Another aspect provides a thermodynamically stable PtBinanoparticle. The nanoparticle comprises a core comprising a PtBialloy. The nanoparticle further comprises a shell at least partially encapsulating the core, with the shell comprising stannous chloride. The thermodynamically stable PtBinanoparticle has a negative charge.

High activity Pt&#x2014;Bi catalyst for dimethyl ether electro-oxidation

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.

Optical sensor based on PFSI membrane comprising associated benzene-1,3-diol for detecting target compounds, and method thereof

A process including coating a fuel cell component with an aqueous solution including a polyelectrolyte polymer.

Coating process for fuel cell components

A process comprising: submerging a fuel cell bipolar plate in a bath comprising nanoparticles and a liquid phase comprising a nanoparticles dispersion agent and wherein the bipolar plate includes an upper surface having a plurality of lands and channels formed therein; removing the fuel cell bipolar plate from the bath so that a coating comprising nanoparticles adheres to the fuel cell bipolar plate; while the coating is wet and before the coating is dried and solidified, removing the coating comprising nanoparticles from the lands of the bipolar plate, leaving coating comprising nanoparticle in the channels; and drying the coating in the channels.

Method of depositing a nanoparticle coating on a bipolar plate and removing the nanoparticle coating from the lands of the bipolar plate

Embodiments of a coated substrate comprise a substrate () with a multi-functional multi-layer nanoparticle coating () having a thickness of up to about 500 nm thereon. The nanoparticle coating () comprises an ionic polyelectrolyte layer (), and a mixed colloid layer disposed over the polyelectrolyte layer (). The mixed colloid layer comprises hydrophilic colloid ions () and conductive colloid ions () which is coupled through electrostatic or non-electrostatic forces, and the conductive colloid ions (), the hydrophilic colloid ions (), or both are coupled to the polyelectrolyte layer ().

Multifunctional nanocoatings with mixed nanoparticles and process for fabricating same

Embodiments of a coated substrate comprise a substrate () and a multi-layer multi-functional nanoparticle coating () having a thickness of up to about 500 nm thereon. The nanoparticle coating () comprises an ionic polyelectrolyte layer (), and an ionic multi-colloid layer disposed over the polyelectrolyte layer (). The multi-colloid layer comprises hydrophilic colloid ions () disposed over and coupled to the polyelectrolyte layer (), conductive colloid ions () disposed over and coupled to the polyelectrolyte layer (). The conductive colloid ions () are separated from the hydrophilic colloid ions () by repulsive forces therebetween.

Multifunctional nanocoatings and process for fabricating same

A process including coating a fuel cell component using a coating solution including nanoparticles.

Nanoparticle coating process for fuel cell components

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.

Addressing one MEA failure mode by controlling MEA catalyst layer overlap

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.

Growing community of inventors

Fairport, NY, United States of America

Anastasios P Angelopoulos