Abstract: Provided is a chromium adsorption material including: a porous body made of a metal material; and a chromium adsorbent carried inside pores of the porous body, wherein the metal material includes a first metal and a second metal, the first metal includes nickel, and the second metal includes at least one selected from the group consisting of tin, aluminum, cobalt, titanium, manganese, tungsten, copper, silver, and gold.

Abstract: A metal porous body has a skeleton of a three-dimensional network structure, an outer layer portion of the skeleton having a second pore smaller in size than a first pore formed by the skeleton, wherein the outer layer portion is a metal layer, and a water vapor reforming catalyst is supported in the outer layer portion.

Abstract: A steam reforming catalyst that promotes production of hydrogen from a gas containing a hydrocarbon in the presence of steam includes a carrier and two or more catalyst metals supported on the carrier and including a first metal and a second metal. The first metal includes Ni, the second metal includes at least one of Co and Ru, and the carrier is represented by LaNbO4 or La1-xSrxNbO4 where x is in a range of 0<x?0.12.

Abstract: A fuel cell includes a cell structure, an oxidizing agent flow path, a fuel flow path, and an anode-side current collector. The cell structure includes a cathode, an anode, and a solid electrolyte layer disposed between the cathode and the anode. The oxidizing agent flow path is formed adjacent to the cathode and away from the solid electrolyte layer. The oxidizing agent flow path is a flow path for supplying a gas that contains an oxidizing agent to the cathode. The fuel flow path is formed adjacent to the anode and away from the solid electrolyte layer. The fuel flow path is a flow path for supplying a fuel gas that contains water vapor and a hydrocarbon to the anode. The anode-side current collector is disposed adjacent to the anode and away from the solid electrolyte layer. The anode-side current collector is in contact with the anode.

Abstract: A proton conductor contains a metal oxide that has a perovskite structure and that is represented by formula (1): AxB1-yMyO3-?, where an element A is at least one element selected from the group consisting of Ba, Ca, and Sr, an element B is at least one element selected from the group consisting of Ce and Zr, an element M is at least one element selected from the group consisting of Y, Yb, Er, Ho, Tm, Gd, In, and Sc, ? indicates an oxygen deficiency amount, and 0.95?x?1 and 0<y?0.5 are satisfied.

Abstract: A chromium adsorption material includes: a porous body made of a metal material; and a chromium adsorbent carried inside pores of the porous body, wherein the metal material includes a first metal and a second metal, the first metal includes nickel, and the second metal includes at least one selected from the group made of tin, aluminum, cobalt, titanium, manganese, tungsten, copper, silver, and gold.

Abstract: A metal porous body includes a flat plate shape and having continuous pores, a framework of the metal porous body including an alloy layer containing nickel and at least one of chromium and tin, a cobalt layer being formed on a surface of the alloy layer.

Abstract: A steam reforming catalyst that promotes production of hydrogen from a gas containing a hydrocarbon in the presence of steam includes a carrier and two or more catalyst metals supported on the carrier and including a first metal and a second metal. The first metal includes Ni, the second metal includes at least one of Co and Ru, and the carrier is represented by LaNbO4 or La1-xSrxNbO4 where x is in a range of 0<x?0.12.

Abstract: A fuel cell includes: a cell structure body including a cathode, an anode, and a solid electrolyte layer interposed between the cathode and the anode; and a current collector in contact with the cathode, wherein an oxidant is supplied to the cathode through the current collector, the current collector includes a porous body made of a metal material, and a chromium adsorbent carried inside pores of the porous body, the metal material includes a first metal and a second metal, the first metal includes nickel, and the second metal includes at least one selected from the group made of tin, aluminum, cobalt, titanium, manganese, tungsten, copper, silver, and gold.

Abstract: A metal porous body has a skeleton of a three-dimensional network structure, an outer layer portion of the skeleton having a second pore smaller in size than a first pore formed by the skeleton, wherein the outer layer portion is a metal layer, and a water vapor reforming catalyst is supported in the outer layer portion.

Abstract: A metal porous body having a frame of a three-dimensional network structure, the frame being formed of a plurality of bone members connected to each other, the plurality of bone members defining openings in a surface of the metal porous body, the plurality of bone members defining voids inside the metal porous body, the openings and the voids communicating with each other, a porosity being from 1 volume % to 55 volume %, a density being from 3 g/cm3 to 10 g/cm3.

Abstract: A cell structure includes a cathode, an anode, and a solid electrolyte layer interposed between the cathode and the anode, the cathode being in the form of a sheet, the anode being in the form of a sheet, the solid electrolyte layer being in the form of a sheet, the solid electrolyte layer being disposed on the anode, the cathode being disposed on the solid electrolyte layer, the cathode having a resistance Rc, the anode and the solid electrolyte layer having a resistance Ra, the resistance Rc and the resistance Ra satisfying a relationship of Rc/Ra?0.3, the cathode including a first metal oxide having a perovskite crystal structure, the cathode having a thickness larger than 15 ?m and equal to or less than 30 ?m.

Abstract: A fuel cell includes a cell structure, an oxidizing agent flow path, a fuel flow path, and an anode-side current collector. The cell structure includes a cathode, an anode, and a solid electrolyte layer disposed between the cathode and the anode. The oxidizing agent flow path is formed adjacent to the cathode and away from the solid electrolyte layer. The oxidizing agent flow path is a flow path for supplying a gas that contains an oxidizing agent to the cathode. The fuel flow path is formed adjacent to the anode and away from the solid electrolyte layer. The fuel flow path is a flow path for supplying a fuel gas that contains water vapor and a hydrocarbon to the anode. The anode-side current collector is disposed adjacent to the anode and away from the solid electrolyte layer. The anode-side current collector is in contact with the anode.

Abstract: An electrolyte layer-anode composite member includes an anode including a first metal oxide having a perovskite crystal structure, and a solid electrolyte layer including a second metal oxide having a perovskite crystal structure, the anode including at least one of nickel and a nickel compound, the anode having a sheet-like shape, the solid electrolyte layer having a sheet-like shape, the solid electrolyte layer being stacked on the anode, the anode having a thickness Ta of 850 ?m or more. The thickness Ta of the anode and a thickness Te of the solid electrolyte layer may satisfy a relation of 0.003?Te/Ta?0.036. The thickness Ta of the anode and a diameter Da of the anode may satisfy a relation of 55?Ta/Da?300.

Abstract: Provided is an electrolyte layer-anode composite member for a fuel cell, the electrolyte layer-anode composite member including an anode and a solid electrolyte layer having ion conductivity, the anode being an aggregate of granules including a composite metal, the composite metal including a nickel element and an iron element, the granules including a plurality of pores, the composite metal accounting for 80% by mass or more of the anode, the anode having a bulk density of 75% or less of a real density of the composite metal. Also provided is a cell structure including the electrolyte layer-anode composite member for a fuel cell described above, and a cathode arranged on a side of the solid electrolyte layer.

Abstract: A proton conductor contains a metal oxide that has a perovskite structure and that is represented by formula (1): AxB1-yMyO3-?, where an element A is at least one element selected from the group consisting of Ba, Ca, and Sr, an element B is at least one element selected from the group consisting of Ce and Zr, an element M is at least one element selected from the group consisting of Y, Yb, Er, Ho, Tm, Gd, In, and Sc, ? indicates an oxygen deficiency amount, and 0.95?x?1 and 0<y?0.5 are satisfied.

Abstract: Provided is a solid oxide fuel cell including a flat-plate-shaped cell structure including a cathode, an anode, and an electrolyte layer containing a solid oxide, a frame-shaped sealing member disposed so as to surround a periphery of the cathode, the sealing member having a larger outside diameter than the cathode, a first pressing member and a second pressing member that hold the sealing member therebetween, and a flat-plate-shaped cathode current collector adjacent to the cathode, the flat-plate-shaped cathode current collector being formed of a porous metal body having a three-dimensional mesh-like skeleton, in which the cathode current collector has a peripheral portion that is not opposite the anode, the outer edge portion of a main surface of the sealing member adjacent to the anode faces the first pressing member, the inner edge portion of the main surface of the sealing member adjacent to the anode faces the peripheral portion of the electrolyte layer, the outer edge portion of a main surface of the

Abstract: A solid-oxide-electrolysis-cell-type hydrogen production apparatus includes a cell structure including a first electrode, a second electrode, and an electrolyte layer, a gas diffusion layer disposed adjacent to the first electrode, and a gas channel plate disposed adjacent to the gas diffusion layer, in which the gas diffusion layer is formed of a porous metal body having a three-dimensional mesh-like skeleton, the gas channel plate includes a first region including a first channel, a second region including a second channel, and a third region including a third channel, the first channel includes a slit extending from the center of the gas channel plate toward its outer edge at the boundary surface between the first region and the second region, letting the total area of the first channel at the boundary surface be a first opening area S1, letting the total area of the second channel at the boundary surface between the second region and the third region be a second opening area S2, and letting the total area

Abstract: A solid-oxide-electrolysis-cell-type hydrogen production apparatus includes a cell structure including a first electrode, a second electrode, and an electrolyte layer, a gas diffusion layer disposed adjacent to the first electrode, and a gas channel plate disposed adjacent to the gas diffusion layer, in which the gas diffusion layer is formed of a porous metal body having a three-dimensional mesh-like skeleton, the gas channel plate includes a first region including a first channel, a second region including a second channel, and a third region including a third channel, the first channel includes a slit extending from the center of the gas channel plate toward its outer edge at the boundary surface between the first region and the second region, letting the total area of the first channel at the boundary surface be a first opening area S1, letting the total area of the second channel at the boundary surface between the second region and the third region be a second opening area S2, and letting the total area

Abstract: A method for producing a cell structure includes: a step of firing a laminated body of a layer containing an anode material and a layer containing a solid electrolyte material, to obtain a joined body of an anode and a solid electrolyte layer; a step of laminating a layer containing a cathode material on a surface of the solid electrolyte layer, and firing the obtained laminated body to obtain a cathode. The anode material contains a metal oxide Ma1 and a nickel compound. The metal oxide Ma1 is a metal oxide having a perovskite structure represented by A1x1B11-y1M1y1O3-? (wherein: A1 is at least one of Ba, Ca, and Sr; B1 is at least one of Ce and Zr; M1 is at least one of Y, Yb, Er, Ho, Tm, Gd, In, and Sc; 0.85?x1?0.99; 0<y1?0.5; and ? is an oxygen deficiency amount).