Abstract:
The present teachings are directed toward electrocatalyst compositions of alloys of platinum, tungsten and nickel for use in fuel cells. The alloys consists essentially of platinum present in an atomic percentage ranging between about 20 percent and about 45 percent, tungsten present in an atomic percentage ranging between about 30 percent and about 70 percent, and nickel present in an atomic percentage ranging between about 5 percent and about 25 percent.
Abstract:
Synthesis of nanoparticles with particle size control is provided by the method of using two different metal-containing precursors, a capping component, an optional reducing agent, and then contacting the two precursors with the capping component to form a reaction solution, which is heated to produce first and second metals-containing nanoparticles. By controlling the ratio of the concentration of the capping component to the total concentration of the two metal-containing precursors, the nanoparticles can have diameters ranging between about 1 nm to about 15 nm. A decrease in the concentration of the capping component typically increases the size of the nanoparticles. Preferred compositions include Pt and Co-containing alloy nanoparticles. Controlled synthesis of larger, about 6 nm to about 12 nm, sized nanoparticles can be achieved in a solvent-free reaction process.
Abstract:
The present teachings are directed toward electrocatalyst compositions of alloys of platinum, tungsten and one of either of nickel or zirconium for use in fuel cells. The alloys consists essentially of platinum present in an atomic percentage ranging between about 20 percent and about 45 percent, tungsten present in an atomic percentage ranging between about 30 percent and about 70 percent, and one of either nickel present in an atomic percentage ranging between about 5 percent and about 25 percent, or zirconium present in an atomic percentage ranging between about 5 percent and about 40 percent.
Abstract:
A bi-laterally surfaced substrate in which the first surface consists of one or more than one of cerium oxide, aluminum oxide, tin oxide manganese oxide, copper oxide, cobalt oxide, nickel oxide, praseodymium oxide, terbium oxide, ruthenium, rhodium, palladium, silver, iridium, platinum and gold and the second surface consists of one or more than one of ruthenium, rhodium, palladium, silver, iridium, platinum and gold and micro channel micro component reactors including such substrates in a predetermined formed shape and methods for making the same utilizing a thermal spray on one side and a physical deposition process on the other side.
Abstract:
The present teachings are directed methods of producing tungsten-containing nanoparticles, specifically tungsten nanoparticles and tungsten oxide nanoparticles with an average particle size of less than about five nanometers.
Abstract:
A fuel cell catalyst comprising platinum, chromium, and copper, nickel or a combination thereof. In one or more embodiments, the concentration of platinum is less than 50 atomic percent, and/or the concentration of chromium is less than 30 atomic percent, and/or the concentration of copper, nickel, or a combination thereof is at least 35 atomic percent.
Abstract:
A substrate having a catalytic surface thereon characterized as a coating of metal oxide and noble metal particles in the nominal diameter size distribution range of 10 micrometers) of hydroxides, carbonates or nitrates of the metals: cerium, aluminum, tin, manganese, copper, cobalt, nickel, praseodymium or terbium particles; and hydroxides, carbonates or nitrates of the noble metals: ruthenium, rhodium, palladium, silver, iridium, platinum and gold onto the substrate. The coating adheres to the surface and provides desirable catalyst properties.
Abstract:
A layer manager provides at least two content layers within a user interface window of a software application. A tab manager provides at least two content tabs within at least one of the content layers. A transfer manager is configured to transfer at least one content tab between the at least two content layers.