Patent application number | Description | Published |
20090023040 | OXYGEN REMOVAL SYSTEMS DURING FUEL CELL SHUTDOWN - A purging system for removing oxygen from a fuel cell system during a shutdown period for the fuel cell system. The purging system includes a separator having an inlet and an outlet; a first exhaust line for communicating a first exhaust gas stream from an outlet of the fuel cell system to the separator inlet during the shutdown period of the fuel cell system; and a second exhaust line for communicating a second exhaust gas stream to an inlet of the fuel cell system for delivering the second exhaust gas stream to the fuel cell system during the shutdown period. The separator removes oxygen from the first exhaust gas stream such that the first stream nitrogen molar volume is lower than the second steam nitrogen molar volume and the first stream oxygen molar volume is higher than the second stream oxygen molar volume. | 01-22-2009 |
20100330452 | Layered Electrodes and Membrane Electrode Assemblies Employing the Same - According to at least one aspect of the present invention, a layered catalyst having an active area is provided. In at least one embodiment, the layered electrode includes a first catalyst layer having a first noble metal concentration and a first ionomer concentration, and a second catalyst layer disposed next to the first catalyst layer, the second catalyst layer having a second noble metal concentration different from the first noble metal concentration and a second ionomer concentration different from the first ionomer concentration. In at least another embodiment, the metallic alloy includes a metallic alloy of platinum, nickel, and cobalt. | 12-30-2010 |
20110020735 | Fuel Cell Catalysts with Enhanced Catalytic Surface Area and Method of Making the Same - According to at least one aspect of the present invention, there is provided a fuel cell catalyst formed from a metallic alloy of one or more catalyst metals and one or more leachable metals through potential cycling to remove at least a portion of the leachable metals such that an effective catalytic surface area of the fuel cell catalyst per a given amount of the catalyst metals is enhanced after removal of the at least a portion of the one or more leachable metals. | 01-27-2011 |
20110033764 | FUEL CELL SYSTEM WITH WETNESS SENSOR - A fuel cell system may have at least one sensor including a pair of electrodes disposed on a substrate. The sensor may be configured to produce an output signal having a magnitude that is proportional to a relative humidity in a vicinity of the sensor and, if liquid water is on the sensor, proportional to an amount of the liquid water on the sensor. | 02-10-2011 |
20120315557 | OXYGEN REMOVAL SYSTEMS DURING FUEL CELL SHUTDOWN - A purging system for removing oxygen from a fuel cell system during a shutdown period for the fuel cell system. The purging system includes a separator having an inlet and an outlet; a first exhaust line for communicating a first exhaust gas stream from an outlet of the fuel cell system to the separator inlet during the shutdown period of the fuel cell system; and a second exhaust line for communicating a second exhaust gas stream to an inlet of the fuel cell system for delivering the second exhaust gas stream to the fuel cell system during the shutdown period. The separator removes oxygen from the first exhaust gas stream such that the first stream nitrogen molar volume is lower than the second steam nitrogen molar volume and the first stream oxygen molar volume is higher than the second stream oxygen molar volume. | 12-13-2012 |
20140178792 | Electrochemical Device Including Amorphous Metal Oxide on Graphene - In one or more embodiments, an electrochemical device includes a catalyst promoter including an amorphous metal oxide, the amorphous metal oxide being of an amount greater than 50 percent by weight of the total weight of the substrate, and a substrate including graphene and supporting the substrate. | 06-26-2014 |
20140178801 | Electrochemical Device Including Amorphous Metal Oxide - In one or more embodiments, an electrochemical device includes a substrate having a substrate surface; an amorphous metal oxide layer supported on the substrate surface; and a noble metal catalyst supported on the amorphous metal oxide layer to form a catalyst layer. The amorphous metal oxide layer may contact only 25 to 75 percent of the substrate surface. The amorphous metal oxide layer may include less than 10 weight percent of crystalline metal oxide. In certain instances, the amorphous metal oxide layer is substantially free of crystalline metal oxide. | 06-26-2014 |
20140220475 | Catalyst Assembly Including an Intermetallic Compound of Iridium And Tungsten - A catalyst assembly having a substrate including an intermetallic compound of W and Ir. The weight ratio of W to Ir is in a range between a first ratio and a second ratio. A catalyst includes at least one noble metal is supported on and contacts the substrate. The first ratio may be in the range of 48:52 and the second ratio may be in the range of 51:49. | 08-07-2014 |