Abstract: A solid polymer electrolyte fuel cell has a fuel electrode and an oxidant electrode, which face each other via a solid polymer electrolyte membrane. A metallic complex is added to the fuel electrode of the solid polymer electrolyte fuel cell. Since this metallic complex adsorbs oxygen as the oxygen partial pressure at the fuel electrode 7 increases and desorbs oxygen as the oxygen partial pressure decreases, oxygen produced when a reverse voltage is generated can be removed efficiently. It may be possible to prevent the deterioration of or damage to a catalyst material of the fuel cell and the electrolyte membrane.

Abstract: In an electrode for polymer electrolyte fuel cells comprising electron conducting particles carrying platinum and an ion conducting polymer, platinum particles formed by a microemulsion method are added in a range of from 5 to 20% of the total amount of platinum in the electrode. A manufacturing method therefor is also provided.

Abstract: A solid polymer fuel cell (1) has an electrolyte membrane (2), and an air electrode (3) and a fuel electrode (4) that closely contact to opposite sides of the electrolyte membrane (2) respectively. The electrolyte membrane (2) has a membrane core (9) comprising a polymer ion-exchange component, and a plurality of phyllosilicate particles (10) that disperse in the membrane core (9) and are subjected to ion-exchange processing between metal ions and protons, and proton conductance Pc satisfies Pc>0.05 S/cm. Owing to this, it is possible to provide the solid polymer fuel cell equipped with the electrolyte membrane (2) that has excellent high-temperature strength and can improve power-generating performance.

Abstract: An electrode for solid polymer fuel cells is capable of generating electric power at high output and high efficiency, without increasing the consumption of catalyst substance. By measurement of X-ray diffraction of catalyst substance of the electrode surface, the ratio I (111)/I (200) of peak intensity I (111) of (111) plane and peak intensity I (200) of (200) plane is 1.7 or less.

Abstract: An electrode for a solid polymer fuel cell, capable of enhancing the power generation efficiency without increasing the amount of catalyst carried on the carbon particles, is provided. Catalyst carrier particles having a catalyst substance 10 carried on the surface of electron conductive particles 1, and a polymer electrolyte containing catalyst having a catalyst substance 20 dispersed in an ion conductive polymer 2 coexist.

Abstract: An active solid polymer electrolyte membrane in a solid polymer type fuel cell comprises a solid polymer electrolyte membrane and a plurality of precious metal catalyst particles supported on the surfaces of the aforementioned solid polymer electrolyte membrane by ion exchange and distributed uniformly over the surfaces thereof. In accordance with the use of this active solid polymer electrolyte membrane the ability to generate power can be enhanced.

Abstract: The membrane electrode assembly comprising a pair of opposing electrodes each having a catalytic layer, and a polymer electrolyte membrane sandwiched by the electrodes, part of the catalytic layers being projecting into the polymer electrolyte membrane is produced by (1) coating a catalytic layer of one electrode with a solution of a polymer electrolyte in an organic solvent, (2) coating the resultant polymer electrolyte membrane with a catalyst slurry for the other electrode, while the amount of the organic solvent remaining in the polymer electrolyte membrane is 5-20 weight % based on the polymer electrolyte membrane, and (3) after drying, hot-pressing the polymer electrolyte membrane and the electrodes formed on both sides of the membrane.

Abstract: An active solid polymer electrolyte membrane provides an enhancement in power-generating performance. The active solid polymer electrolyte membrane in a solid polymer electrolyte fuel cell includes a solid polymer electrolyte element, and a plurality of noble metal catalyst grains which are carried by an ion exchange in a surface layer located inside a surface of the solid polymer electrolyte element and which are dispersed uniformly in the entire surface layer. The surface layer has a thickness t2 equal to or smaller than 10 &mgr;m. An amount CA of noble metal catalyst grains carried is in a range of 0.02 mg/cm2≦CA<0.14 mg/cm2.

Abstract: A solid polymer fuel cell includes an electrolyte membrane having a polymer ion-exchange component, and an air electrode and a fuel electrode between which the electrolyte membrane is sandwiched. Each of the air electrode and the fuel electrode can be formed of a polymer ion-exchange component and a plurality of catalyst particles including a catalyst metal carried on surfaces of carbon black particles, and includes no third component. When a moistening for maintaining the electrolyte membrane in a wet state is carried out from both of the side of the air electrode and the side of the fuel electrode, the carbon black particles have a water-repellent property such that an amount A of water adsorbed under a saturated steam pressure at 60° C. is equal to or smaller than 80 cc/g, and a ratio Wp/Wc of a weight Wp of polymer ion-exchange component incorporated to a weight Wc of carbon black particles incorporated is set in a range of 0.4≦Wp/Wc≦1.25.

Abstract: An membrane electrode assembly for a fuel cell composed of a pair of electrode catalyst layers and an electrolyte membrane sandwiched between the electrode catalyst layers is configured so that the catalyst of at least one surface of the electrode catalyst layers enters in the electrolyte membrane whereby the electrode catalyst layer and the electrolyte membrane are unified with each other. In this configuration, no exfoliation occurs at the interface between the electrode catalyst layer and the electrolyte membrane, and the durability of the membrane electrode assembly can be increased even during the course of heat cycles.

Abstract: An electrolyte membrane/electrode assembly 9 of a solid polymer electrolyte fuel cell includes an electrolyte membrane 2, and an air pole 3 and a fuel pole 4 provided to sandwich the electrolyte membrane 2 therebetween. Each of the electrolyte membrane, the air pole and the fuel pole includes a polymer ion-exchange component. The electrolyte membrane/electrode assembly has an ion-exchange capacity Ic in a range of 0.9 meq/g≦Ic≦5 meq/g, and a dynamic viscoelastic modulus at 85° C. in a range of 5×108 Pa≦Dv≦1×1010 Pa. In the electrolyte membrane/electrode assembly 9, a high power-generating performance can be maintained at an operating temperature not lower than 85° C.

Abstract: Main tester unit tests an IC device for presence of a defect for each of a plurality of addresses of the IC device under predetermined test conditions and stores test results for the individual addresses into a first memory. Curing analysis processing section cures each of the addresses of the IC device determined as defective, on the basis of the test results for the individual addresses stored in the first memory. To this end, the curing analysis processing section may rearrange an address logic of the IC device to replace a physical space of the defective addresses with an extra or redundant address space and thereby place each of the defective addresses in a usable condition.

Abstract: Steroidal 19-nor-3-hydroxy-1, 3, 5(10)-trienes are produced by a process which comprises admixing a preheated hydrocarbon and a solution of a steroidal 10-methyl-1, 4-diene-3-one dissolved or suspended in a hydrocarbon, and then pyrolyzing said steroidal compound.