Patent application number | Description | Published |
20090247400 | NANOSEGREGATED SURFACES AS CATALYSTS FOR FUEL CELLS - A method of preparing a nanosegregated Pt alloy having enhanced catalytic properties. The method includes providing a sample of Pt and one or more of a transition metal in a substantially inert environment, and annealing the sample in such an environment for a period of time and at a temperature profile to form a nanosegregated Pt alloy having a Pt-skin on a surface. The resulting alloy is characterized by a plurality of compositionally oscillatory atomic layers resulting in an advantageous electronic structure with enhanced catalytic properties. | 10-01-2009 |
20110077147 | Nanosegregated Surfaces As Catalysts for Fuel Cells - A method of preparing a nanosegregated Pt alloy having enhanced catalytic properties. The method includes providing a sample of Pt and one or more of a transition metal in a substantially inert environment, and annealing the sample in such an environment for a period of time and at a temperature profile to form a nanosegregated Pt alloy having a Pt-skin on a surface. The resulting alloy is characterized by a plurality of compositionally oscillatory atomic layers resulting in an advantageous electronic structure with enhanced catalytic properties. | 03-31-2011 |
20110245068 | HIGHLY DURABLE NANOSCALE ELECTROCATALYST BASED ON CORE SHELL PARTICLES - A multimetallic nanoscale catalyst having a sore portion enveloped by a shell portion and exhibiting high catalytic activity and improved catalytic durability. In various embodiments, the core/shell nanoparticles comprise a gold particle coated with a catalytically active platinum bimetallic material. The shape of the nanoparticles is substantially defined by the particle shape of the core portion. The nanoparticles may be dispersed on a high surface area substrate for use as a catalyst and is characterized by no significant loss in surface area and specific activity following extended potential cycling. | 10-06-2011 |
20120208696 | HIGHLY DURABLE NANOSCALE ELECTROCATALYST BASED ON CORE SHELL PARTICLES - A multimetallic nanoscale catalyst having a core portion enveloped by a shell portion and exhibiting high catalytic activity and improved catalytic durability. In various embodiments, the core/shell nanoparticles comprise a gold particle coated with a catalytically active platinum bimetallic material. The shape of the nanoparticles is substantially defined by the particle shape of the core portion. The nanoparticles may be dispersed on a high surface area substrate for use as a catalyst and is characterized by no significant loss in surface area and specific activity following extended potential cycling. | 08-16-2012 |
20130004885 | FUEL CELL ELECTRODES - A process includes patterning a surface of a platinum group metal-based electrode by contacting the electrode with an adsorbate to form a patterned platinum group metal-based electrode including platinum group metal sites blocked with adsorbate molecules and platinum group metal sites which are not blocked. | 01-03-2013 |
20130004886 | FUEL CELL ELECTRODES - A process includes patterning a surface of a platinum group metal-based electrode by contacting the electrode with an adsorbate to form a patterned platinum group metal-based electrode including platinum group metal sites blocked with adsorbate molecules and platinum group metal sites which are not blocked. | 01-03-2013 |
20130209898 | MESOSTRUCTURED THIN-FILMS AS ELECTROCATALYSTS WITH TUNABLE COMPOSITIONS AND SURFACE MORPHOLOGY - A composition of matter and method of manufacturing as thin film electrocatalyst. The method uses physical vapor deposition to deposit a thin film of PtM (Ma transition metal) to form a Pt based alloy and annealing the thin film to achieve a (111) hexagonal faceted grain structure having catalytic activity approaching Pt | 08-15-2013 |
20140116890 | HYDROGEN EVOLUTION REACTION CATALYST - Systems and methods for a hydrogen evolution reaction catalyst are provided. Electrode material includes a plurality of clusters. The electrode exhibits bifunctionality with respect to the hydrogen evolution reaction. The electrode with clusters exhibits improved performance with respect to the intrinsic material of the electrode absent the clusters. | 05-01-2014 |
20140370421 | HYDROGEN OXIDATION REACTION RATE BY PROMOTION OF HYDROXYL ADSORPTION - A method and article of manufacture including a catalytic substrate with a surface layer providing balanced active sites for adsorption/dissociation of H | 12-18-2014 |