Abstract: Provided are a photocatalytic material that improves a decomposition performance and a decomposition rate, as well as a photocatalytic member and a purification device in which the photocatalytic material is used. The photocatalytic member is a photocatalytic member (1) that includes a substrate (10) and a photocatalyst layer (11) formed on a surface of the substrate (10), wherein the photocatalyst layer (11) contains a titanium oxide photocatalyst and zeolite, the titanium oxide photocatalyst containing at least an anatase-type titanium oxide and fluorine, in which a content of the fluorine in the titanium oxide photocatalyst is 2.5 wt % to 3.5 wt %, and 90 wt % or more of the fluorine is chemically bonded to the anatase-type titanium oxide.

Abstract: A titanium oxide photocatalyst that is capable of improving a decomposition rate, and a method for producing the same are provided. The titanium oxide photocatalyst of the present invention is a titanium oxide photocatalyst containing at least an anatase-type titanium oxide and fluorine, wherein a content of the fluorine is 2.5 wt % to 3.5 wt %, and 90 wt % or more of the fluorine is chemically bonded to the anatase-type titanium oxide.

Abstract: A material which conducts protons or oxide ions with high ionic conductivity and is excellent in moisture resistance and reduction resistance is provided. A perovskite oxide represented by the formula (1): BaZraCebM1cL1dO3-???(1) (wherein M1 is at least one member selected from the group consisting of rare earth elements, In, Mn, Fe, Co, Ni, Al and Ga, L1 is at least one member selected from the group consisting of P, B and N and a, b, c, d and a satisfy 0?a<1.2, 0<b<1.2, 0<c<1.2, 0.9<a+b+c<1.2, 0<d<0.1 and 0<?<3) is used as an ionic conductor.

Abstract: A mixed ionic conductor with an ion conductive oxide has a perovskite structure of the formula Baa(Ce1-bM1b)LcO3-?, wherein M1 is at least one trivalent rare earth element other than Ce; L is at least one element selected from the group consisting of Zr, Ti, V, Nb, Cr, Mo, W, Fe, Co, Ni, Cu, Ag, Au, Pd, Pt, Bi, Sb, Sn, Pb and Ga; with 0.9?a?1; 0.16?b?0.26; 0.01?c?0.1; and (2+b?2a)/2??<1.5. Such a mixed ionic conductor has not only the necessary conductivity for electrochemical devices such as fuel cells, but also superior moisture resistance.

Abstract: A material which conducts protons or oxide ions with high ionic conductivity and is excellent in moisture resistance and reduction resistance is provided. A perovskite oxide represented by the formula (1): BaZraCebM1cL1dO3-???(1) (wherein M1 is at least one member selected from the group consisting of rare earth elements, In, Mn, Fe, Co, Ni, Al and Ga, L1 is at least one member selected from the group consisting of P, B and N and a, b, c, d and a satisfy 0?a<1.2, 0<b<1.2, 0<c<1.2, 0.9<a+b+c<1.2, 0<d<0.1 and 0<?<3) is used as an ionic conductor.

Abstract: A mixed ionic conductor of the present invention includes a perovskite oxide of Ba, Ce, and In. The perovskite oxide is a crystalline compound expressed by Ba(Ce1-xInx)pO3, where x is 0.4 to 0.6 and p is 1 to 1.02. An electrochemical device of the present invention includes the mixed ionic conductor as a solid electrolyte. In the electrochemical device, electrons generated by an oxidation-reduction reaction are drawn in the thickness direction of the solid electrolyte. With this configuration, the present invention can provide a mixed ionic conductor that has high conductivity and high reliability, and an electrochemical device using the mixed ionic conductor.

Abstract: A hydrogen sensor includes a solid electrolyte made of a barium cerium oxide, and a first electrode and a second electrode that are formed on the surface of the solid electrolyte. The first and the second electrodes are made of a material having a catalytic effect with respect to an oxidation reaction of hydrogen and are made of the same material. Thus, the hydrogen sensor can be inexpensive and has good hydrogen selectivity and responsiveness to detection, and thus it is possible to measure hydrogen in a high concentration region.

Abstract: A solid electrolyte fuel cell including a protonic oxide conductor having a composition represented by Ba(Zr1?xCex)1?yMyAlzO3?? (M: one or more kinds of elements selected from a group of tri-valent rare earth elements and In, 1?x?0, 0.3>y>0, 0.04>z?0, and 1.5>?>0); and an electrode that is mainly made of platinum and has catalysis properties; wherein an electrolyte has a film thickness of 300 ?m or less, and a method of manufacturing the same are disclosed. The solid electrolyte fuel cell can obtain a cell output even at low temperatures equal to 500 degrees centigrade or less.

Abstract: There is provided a fuel cell having excellent portability and transportability and exhibiting superior power generation efficiency for which it is possible to use a liquid or solid fuel, which has higher energy density than a gaseous fuel. A fuel cell includes an electrolyte (1), an anode (2) and a cathode (3) that are disposed so as to sandwich the electrolyte (1), and further includes a fuel supply portion that supplies a fuel to the anode (2), an oxidant supply portion that supplies an oxidant containing oxygen to the cathode (3), and a cell heating portion that heats the fuel cell, and the electrolyte (1) is made of a solid oxide, and the fuel is a liquid or solid at room temperature and normal pressure.

Abstract: A mixed ionic conductor of the present invention includes a perovskite oxide of Ba, Ce, and In. The perovskite oxide is a crystalline compound expressed by Ba(Ce1-xInx)pO3, where x is 0.4 to 0.6 and p is 1 to 1.02. An electrochemical device of the present invention includes the mixed ionic conductor as a solid electrolyte. In the electrochemical device, electrons generated by an oxidation-reduction reaction are drawn in the thickness direction of the solid electrolyte. With this configuration, the present invention can provide a mixed ionic conductor that has high conductivity and high reliability, and an electrochemical device using the mixed ionic conductor.

Abstract: The present invention provides a solid oxide fuel cell with superior power generation characteristics even at lower temperatures (for example, in a range of 200° C. to 600° C. and preferably in a range of 400° C. to 600° C.) and a method for manufacturing the same. The solid oxide fuel cell is such that the solid oxide fuel cell includes an anode, a cathode, and a first solid oxide held between the anode and the cathode, the anode includes metal particles (2), an anode catalyst (1), and ion conducting bodies (3), the anode catalyst (1) is attached to the surface of the metal particles (2), and the first solid oxide and the ion conducting bodies (3) have either one of an ionic conductivity that is selected from oxide ionic conductivity and hydrogen ionic conductivity.

Abstract: A mixed ionic conductor with an ion conductive oxide has a perovskite structure of the formula Baa(Ce1-bM1b)LcO3-?, wherein M1 is at least one trivalent rare earth element other than Ce; L is at least one element selected from the group consisting of Zr, Ti, V, Nb, Cr, Mo, W, Fe, Co, Ni, Cu, Ag, Au, Pd, Pt, Bi, Sb, Sn, Pb and Ga; with 0.9?a?1; 0.16?b?0.26; 0.01?c?0.1; and (2+b?2a)/2??<1.5. Such a mixed ionic conductor has not only the necessary conductivity for electrochemical devices such as fuel cells, but also superior moisture resistance.

Abstract: A hydrocarbon sensor of the present invention includes a substrate made of a solid electrolyte that conducts protons, and a pair of electrodes formed on the substrate, and at least one electrode of the pair of electrodes contains Au and Al. Assuming that a content of an Al simple substance in one of the pair of electrodes is “a” mol %, and a content of aluminum oxide therein is “b” mol %, “a” and “b” satisfy a relationship: a+2b≦7.

Abstract: A solid electrolyte fuel cell including a protonic oxide conductor having a composition represented by Ba(Zr1−xCex)1−yMyAlzO3−&agr; (M: one or more kinds of elements selected from a group of tri-valent rare earth elements and In, 1≧x≧0, 0.3>y>0, 0.04>z≧0, and 1.5>&agr;>0); and an electrode that is mainly made of platinum and has catalysis properties; wherein an electrolyte has a film thickness of 300 &mgr;m or less, and a method of manufacturing the same are disclosed. The solid electrolyte fuel cell can obtain a cell output even at low temperatures equal to 500 degrees centigrade or less.

Abstract: A hydrocarbon sensor of the present invention includes a substrate made of a solid electrolyte that conducts protons, and a pair of electrodes formed on the substrate, and at least one electrode of the pair of electrodes contains Au and Al. Assuming that a content of an Al simple substance in one of the pair of electrodes is “a” mol %, and a content of aluminum oxide therein is “b” mol %, “a” and “b” satisfy a relationship: a+2b≦7.

Abstract: The invention presents a hydrocarbon sensor excellent in yield and high in detection precision. To achieve the object, the invention includes a solid electrolyte layer (1) contained barium-cerium oxide, a pair of electrodes, cathode (2) and anode (3), provided on the solid electrolyte layer (1), a ceramic substrate (4) having a coefficient of thermal expansion nearly same as that of the solid electrolyte layer (1), and a heater (7) provided on the ceramic substrate (4), in which the solid electrolyte layer (1) and ceramic substrate (4) are bonded to each other.

Abstract: A mixed ionic conductor with an ion conductive oxide has a perovskite structure of the formula Baa(Ce1−bM1b)LcO3−&agr;, wherein

Abstract: A mixed ionic conductor with an ion conductive oxide has a perovskite structure of the formula BadZr1−x−yCexMy3O3−&ggr; wherein M3 is at least one element selected from the group consisting of Sm, Eu, Gd, Tb, Yb, Y, Sc, and In; with 0.98≦d≦1; 0.01≦x<0.5; 0.01≦y≦0.3; (2+y−2d)/2≦&ggr;<1.5. Such a mixed ionic conductor has not only the necessary conductivity for electrochemical devices such as fuel cells, but also superior moisture resistance.

Abstract: The invention presents an ion conductor with high reliability, that is one of the following perovskite oxides: {circle around (1)} perovskite oxide of the composition BaZr1-xCexO3-p (0<x<0.8); {circle around (2)} perovskite oxide consisting essentially of Ba, Zr, Ce and O, and substantially conducting protons only; {circle around (3)} perovskite oxide of the composition BaZr1-x-yCexMyO3-p (M, O≦x<1,0<y<1, x+y<1) that is a single-phase polycrystal of cubic, tetragonal or orthorhombic crystal structure whose unit cell edges a, b and c (with a≧b≧c) satisfy 0.8386 nm<a<0.8916 nm and b/a≧0.90; {circle around (4)} perovskite oxide of the same composition as in {circle around (3)} that is a single-phase sintered product with a density of at least 96% of the theoretical density; and {circle around (5)} perovskite oxide of the same composition as in {circle around (3)} that is a single-phase sintered product with 1 to 30 &mgr;m granular diameter.

Abstract: A hydrogen sensor includes a solid electrolyte made of a barium cerium oxide, and a first electrode and a second electrode that are formed on the surface of the solid electrolyte. The first and the second electrodes are made of a material having a catalytic effect with respect to an oxidation reaction of hydrogen and are made of the same material. Thus, the hydrogen sensor can be inexpensive and has good hydrogen selectivity and responsiveness to detection, and thus it is possible to measure hydrogen in a high concentration region.