An object of the present invention is to provide platinum-tungsten solid solution particles that can be suitably used for catalyst applications and others. Another object is to provide a catalyst with higher catalytic activity than when platinum is used alone. Disclosed are platinum-tungsten solid solution particles comprising platinum and tungsten in solid solution at an atomic level. Also disclosed is a catalyst comprising the platinum-tungsten solid solution particles.

A carrier powder is thermodynamically stable and conductivity can be easily provided thereto. A carrier powder includes an aggregate of carrier fine particles; wherein: the carrier fine particles include a chained portion structured by fusion bonding a plurality of crystallites into a chain; the carrier fine particles contain titanium oxide; and a ratio of anatase phase/rutile phase of the titanium oxide of the carrier powder is 0.2 or lower.

A fuel cell system includes a fuel cell stack, a fuel inlet conduit configured to provide a fuel to a fuel inlet of the fuel cell stack, an electrochemical pump separator containing an electrolyte, a cathode, and a carbon monoxide tolerant anode, a fuel exhaust conduit that operatively connects a fuel exhaust outlet of the fuel cell stack to an anode inlet of the electrochemical pump separator, and a product conduit which operatively connects a cathode outlet of the electrochemical pump separator to the fuel inlet conduit.

The present invention provides a catalysed ion-conducting membrane comprising an ion-conducting membrane, an electrocatalyst layer having two opposing faces, and a layer A comprising an ion-conducting material and a carbon containing material. Also provided are methods for preparing the catalysed ion-conducting membrane.

The invention relates to electrochemical current sources, more particularly to metal-air current sources, and even more particularly to lithium-air current sources and their electrodes. A cathode comprises a base made of a porous electrically conducting material that is permeable to molecular oxygen, the working surface of which has a copolymer applied thereto, which is produced by the copolymerization of a monomeric transition metal coordination complex having a Schiff base and a thiophene group monomer. The monomeric transition metal coordination complex having a Schiff base can be, for example, a compound of the [M(R,R-Salen)], [M(R,R-Saltmen)] or [M(R,R-Salphen)] type, and the thiophene group monomer can be a compound selected from a thiophene group consisting of 3-alkylthiophenes, 3,4-dialkylthiophenes, 3,4-ethylenedioxythiophene or combinations thereof. A current source comprises the described cathode and an anode made from an active metal, in particular lithium, wherein the cathode and the anode are separated by an electrolyte containing ions of the metal from which the anode is made. It has been established that in this system, the copolymer exhibits the properties of an effective catalyst. The technical result is an increase in the specific energy, specific power and number of charge and discharge cycles of a metal-air current source.

An electrochemical cell comprising an anode, an electrolyte adjacent to the anode, a cathode adjacent to the electrolyte, and an interconnector adjacent to the cathode. One or more of the anode, the cathode, and the interconnector comprises a ternary oxide material comprising the chemical formula of M.sup.1.sub.xM.sup.2.sub.yO.sub.z, where M.sup.1 is an alkali metal element or an alkaline earth metal element, M.sup.2 is a platinum group metal, each of x and y is independently an integer less than or equal to 2, and z is independently an integer less than or equal to 4. A system comprising one or more electrochemical cells and methods of forming the ternary oxide material are also disclosed.

An electrode catalyst layer that suppresses degradation due to repeated starting and stopping and has excellent durability, and a membrane electrode assembly using the electrode catalyst layer. The electrode catalyst layer is an electrode catalyst layer used in a polymer fuel electrolyte fuel cell, which contains carbon particles which support catalyst, a polymer electrolyte, and a fiber material which is at least one of a carbon fiber and an organic electrolyte fiber, and the thickness of the electrode catalyst layer after performing a start-stop test from 1 V to 1.5 V for 10,000 cycles is 70% or more of the thickness of the electrode catalyst layer before the start-stop test.

Provided is an oxygen reduction catalyst having an excellent oxygen reduction catalytic activity and a selection method thereof, a liquid composition or electrode containing an oxygen reduction catalyst, and an air battery or fuel cell provided with the electrode. An oxygen reduction catalyst containing a metal complex and a conductive material and having an ionization potential value of 5.80 eV or lower and a selection method thereof, a liquid composition or electrode containing an oxygen reduction catalyst, and an air battery or fuel cell provided with electrode.

Provided is an oxygen reduction catalyst having an excellent oxygen reduction catalytic activity and a selection method thereof, a liquid composition or electrode containing an oxygen reduction catalyst, and an air battery or fuel cell provided with the electrode. An oxygen reduction catalyst containing a metal complex and a conductive material and having an ionization potential value of 5.80 eV or lower and a selection method thereof, a liquid composition or electrode containing an oxygen reduction catalyst, and an air battery or fuel cell provided with electrode.

Techniques for fabricating a solid oxide electrolyzer cell (SOEC) including sintering an electrolyte, printing a fuel-side electrode disposed on a fuel side of the electrolyte, printing an air-side electrode disposed on an air side of the electrolyte, first sintering a combination of the electrolyte, fuel-side electrode, and air-side electrode, printing a barrier layer an air side of the electrolyte, printing a functional layer on the barrier layer, printing a collector layer on the functional layer, and second sintering a combination of the electrolyte, fuel-side electrode, air-side electrode, barrier layer, functional layer, and collector layer.