Abstract: A film that contains Ni2O3H as a main component.

Abstract: A film that contains Ni2O3H as a main component.

Abstract: Provided is a negative electrode active material for a battery, the negative electrode active material comprising an iron compound, the iron compound containing a salt of a polyoxygen anion with iron, wherein the polyoxygen anion has a first atom and an oxygen atom, the first atom is at least one type of atom selected from atoms belonging to Group 4, Group 5, Group 6, Group 13, and Group 14 in the periodic table of elements, and a molar ratio of the oxygen atom to the first atom in the polyoxygen anion is more than 1.

Abstract: A hydride secondary battery includes: a pressure vessel; a positive electrode disposed in the pressure vessel; a negative electrode disposed in the pressure vessel; and hydrogen gas with which the pressure vessel is filled. The negative electrode contains a hydrogen-absorbing alloy. In a pressure-composition-temperature diagram, a desorption curve at 25° C. of the hydrogen-absorbing alloy has a plateau pressure of 0.15 MPa or more and 10 MPa or less. The hydrogen gas has a pressure equal to or higher than the plateau pressure at 25° C. of the hydrogen-absorbing alloy.

Abstract: An alkaline secondary battery includes at least a case, a positive electrode, a negative electrode, and an electrolyte solution. The case accommodates the positive electrode, the negative electrode, and the electrolyte solution. The positive electrode includes manganese dioxide and nickel hydroxide. The negative electrode includes a hydrogen storage alloy.

Abstract: The present invention is to provide a redox type fuel cell that is able to quickly regenerate a mediator. The present invention is such a redox type fuel cell that a mediator is circulated in a cathode electrode, wherein a regenerator for oxidizing the mediator includes: a first chamber configured to store a mediator-containing solution; a second chamber configured to store an oxygen reduction reaction medium solution; a power source; a first electrode disposed in the first chamber and connected to a positive electrode of the power source: a second electrode disposed in the second chamber and connected to a negative electrode of the power source; an ion exchange path configured to connect the first chamber and the second chamber; and a gas supplier configured to supply an oxygen-containing gas into the second chamber.

Abstract: An alkaline secondary battery includes at least a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes at least one of manganese oxyhydroxide and manganese dioxide. The negative electrode includes a hydrogen storage alloy.

Abstract: This battery positive electrode active material contains at least one compound selected from nickel hydroxide, nickel oxyhydroxide and derivatives of these which cause a redox reaction during battery operation, or alternatively contains a metal oxide, or derivative thereof, which does not cause a redox reaction during battery operation, or an inorganic-organic hybrid compound formed by an organic polymer having a hydroxyl group chemically bonding with said metal oxide or derivative. In a diffraction intensity-angle diagram obtained by powder X-ray diffraction using CuK? radiation in a state in which the active material contains nickel hydroxide, the half-value width of the diffraction peak corresponding to the crystal 001 plane of the nickel hydroxide is greater than or equal to 2 (2?°) and preferably greater than or equal to 4 (2?°), or there is no diffraction peak.

Abstract: Provided are a photocatalyst having higher activity for hydrogen production through water splitting and a photoelectrode comprising the photocatalyst. The photocatalyst for water splitting of the present invention comprises a Ga selenide, an Ag—Ga selenide, or both thereof.

Abstract: A hydride secondary battery includes: a pressure vessel; a positive electrode disposed in the pressure vessel; a negative electrode disposed in the pressure vessel; and hydrogen gas with which the pressure vessel is filled. The negative electrode contains a hydrogen-absorbing alloy. In a pressure-composition-temperature diagram, a desorption curve at 25° C. of the hydrogen-absorbing alloy has a plateau pressure of 0.15 MPa or more and 10 MPa or less. The hydrogen gas has a pressure equal to or higher than the plateau pressure at 25° C. of the hydrogen-absorbing alloy.

Abstract: The present invention is to provide a hydrogen oxidation catalyst that does not contain platinum. Disclosed is a hydrogen oxidation catalyst that is a dinuclear transition metal complex having a chemical structure represented by the following general formula (1) or (2): wherein, in the general formulae (1) and (2), M1 and M2 are each independently Fe or Ru; Ar1 and Ar2 are each independently a cyclopentadienyl group or a pentamethylcyclopentadienyl group; Ar3 and Ar4 are each independently a divalent aromatic hydrocarbon group having 6 to 12 carbon atoms; and Ar5 is a monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms, and in the general formula (2), R1 and R2 are each independently a hydrogen atom or a monovalent aliphatic hydrocarbon group having 1 to 3 carbon atoms.

Abstract: The present invention is to provide a redox type fuel cell that is able to quickly regenerate a mediator. The present invention is such a redox type fuel cell that a mediator is circulated in a cathode electrode, wherein a regenerator for oxidizing the mediator includes: a first chamber configured to store a mediator-containing solution; a second chamber configured to store an oxygen reduction reaction medium solution; a power source; a first electrode disposed in the first chamber and connected to a positive electrode of the power source: a second electrode disposed in the second chamber and connected to a negative electrode of the power source; an ion exchange path configured to connect the first chamber and the second chamber; and a gas supplier configured to supply an oxygen-containing gas into the second chamber.

Abstract: A hydrogen generator that can be operated in a broad temperature range is disclosed, which comprises a first ammonia conversion part having a hydrogen-generating material which reacts with ammonia in a first temperature range so as to generate hydrogen; a second ammonia conversion part having an ammonia-decomposing catalyst which decomposes ammonia into hydrogen and nitrogen in a second temperature range; an ammonia supply part which supplies ammonia; and an ammonia supply passage which supplies ammonia from said ammonia supply part to the first and second ammonia conversion parts. The first temperature range includes temperatures lower than the second temperature range, and hydrogen is generated from ammonia by selectively using the first and second ammonia conversion parts. An ammonia-burning internal combustion engine and a fuel cell having the hydrogen generator are also disclosed.

Abstract: The present invention is to provide a hydrogen oxidation catalyst that does not contain platinum. Disclosed is a hydrogen oxidation catalyst that is a dinuclear transition metal complex having a chemical structure represented by the following general formula (1) or (2): wherein, in the general formulae (1) and (2), M1 and M2 are each independently Fe or Ru; Ar1 and Ar2 are each independently a cyclopentadienyl group or a pentamethylcyclopentadienyl group; Ar3 and Ar4 are each independently a divalent aromatic hydrocarbon group having 6 to 12 carbon atoms; and Ar5 is a monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms, and in the general formula (2), R1 and R2 are each independently a hydrogen atom or a monovalent aliphatic hydrocarbon group having 1 to 3 carbon atoms.

Abstract: A hydrogen oxidation catalyst which is formed of a Dawson-type polyoxometalate compound represented by general formula (I). Xa[P2MbO61Ruc(L)d] (I) (In the formula, X represents a monovalent cation independently selected from among an alkali metal cation, a tetraalkyl ammonium cation and a tetraalkyl phosphonium cation; M represents a transition metal independently selected from among V, Nb, Mo and W; L represents a ligand independently selected from among H2O and an organic ligand, provided that at least one L is H2O; a represents the number of cations (X) necessary for neutralizing the electrical charge of the compound as a whole; b represents an integer of 12-17 and c represents an integer of 1-6, provided that the total of b and c is equal to 18; and d represents an integer that is equal to c.

Abstract: A fuel cell includes an anode that is supplied with a gas containing an anode active material for being oxidized, a cathode that is supplied with a liquid containing a nonvolatile cathode active material for being reduced, and an electrolyte membrane that separates the anode and the cathode, and the electrolyte membrane comprises an inorganic/organic hybrid compound that is formed by chemical bonding of polyvinyl alcohol with an inorganic compound including at least one compound selected from the group consisting of silicic acid compounds, a tungstic acid compounds, and zirconic acid compounds.

Abstract: An ammonia-engine system is capable of supplying an ammonia cracking catalyst with a temperature necessary to promote a reaction even during low load operation in which a temperature of an exhaust gas from an ammonia engine is lower than an operating temperature of the ammonia cracking catalyst. In an ammonia-engine system provided with an ammonia engine (2) using ammonia as fuel and an ammonia cracking device (5) including an ammonia cracking catalyst that cracks ammonia and cracking ammonia to produce hydrogen, an ammonia oxidizing device (4) is provided between the ammonia engine (2) and the ammonia cracking device (5).

Abstract: Provided are a photocatalyst having higher activity for hydrogen production through water splitting and a photoelectrode comprising the photocatalyst. The photocatalyst for water splitting of the present invention comprises a Ga selenide, an Ag—Ga selenide, or both thereof.

Abstract: A solid electrolyte including a layered metal oxide represented by the formula (1), (La1-xAx)(Sr1-yBy)3(Co1-zCz)3O10-???(1) [wherein A represents a rare earth element other than La; B represents Mg, Ca, or Ba; C represents Ti, V, Cr, or Mn; 0?x<1, 0?y<1, 0?z<1; and ? represents an oxygen deficiency amount].

Abstract: A fuel cell system whose fuel loss caused by the crossover of the fuel is small and which can be operated economically. The fuel cell system includes a fuel cell 10, a primary feeding system 12 for feeding a primary fuel which is a liquid fuel to the fuel cell 10, a secondary feeding system 13 for feeding a secondary fuel which is a liquid fuel whose saturation vapor pressure is lower than that of the primary fuel to the fuel cell 10, a ECU 30 for controlling each part so that the primary fuel in the fuel cell is replaced with the secondary fuel when terminating the operation of the fuel cell 10.