摘要:
The present invention relates to a metal catalyst containing fine metal particles, characterized in that the fine metal particles have a particle diameter of 3 nm or less and also have a proportion of metallic bond state of 40% or more, which is ascribed by subjecting to waveform separation of a binding energy peak peculiar to the metal as measured by using an X-ray photoelectron spectrometer. The fine metal particles are preferably fine platinum particles. The fine metal particles are preferably supported on the surface of carrier particles by reducing ions of metal to be deposited through the action of a reducing agent in a reaction system of a liquid phase containing the carrier particles dispersed therein, thereby to deposit the metal on the surface of carrier particles in the form of fine particles. The proportion of metallic bond state of the fine metal particles is adjusted within the above range by reducing after deposition thereby to decrease the oxidation state.
摘要:
When fine metal particles of a nano meter size are handled in a state of colloidal particles, it is difficult to handle them and the range of the selection of the solvent to be used is limited. The invention offers a granular metal powder that is produced by the steps of (a) preparing a suspension liquid comprising (a1) water, an organic solvent, or a mixture thereof, (a2) metal particles having an average particle diameter of at least 1 nm and at most 100 nm, and (a3) an organic compound capable of being adsorbed on the surface of the metal particles and (b) removing the water, organic solvent, or mixture thereof by drying the suspension liquid and that has an apparent density of at least 1.0 g/ml and at most 5.0 g/ml. The granular metal powder can be handled as a dry metal powder and is readily redispersed in a solvent.
摘要:
Provided are a gas decomposition component, a method for producing a gas decomposition component, and a power generation apparatus. A gas decomposition component 10 includes a cylindrical-body MEA 7 including a first electrode 2 disposed on an inner-surface side, a second electrode 5 disposed on an outer-surface side, and a solid electrolyte 1 sandwiched between the first electrode and the second electrode; and a porous metal body 11s inserted on the inner-surface side of the cylindrical-body MEA and electrically connected to the first electrode, wherein the gas decomposition component further includes a porous conductive-paste-coated layer 11g formed on an inner circumferential surface of the first electrode, and a metal mesh sheet 11a disposed on an inner circumferential side of the conductive-paste-coated layer, and an electrical connection between the first electrode and the porous metal body is established through the conductive-paste-coated layer and the metal mesh sheet.
摘要:
The present invention relates to a metal catalyst containing fine metal particles, characterized in that the fine metal particles have a particle diameter of 3 nm or less and also have a proportion of metallic bond state of 40% or more, which is ascribed by subjecting to waveform separation of a binding energy peak peculiar to the metal as measured by using an X-ray photoelectron spectrometer. The fine metal particles are preferably fine platinum particles. The fine metal particles are preferably supported on the surface of carrier particles by reducing ions of metal to be deposited through the action of a reducing agent in a reaction system of a liquid phase containing the carrier particles dispersed therein, thereby to deposit the metal on the surface of carrier particles in the form of fine particles. The proportion of metallic bond state of the fine metal particles is adjusted within the above range by reducing after deposition thereby to decrease the oxidation state.
摘要:
Provided is a gas decomposition component that employs an electrochemical reaction and can have high treatment performance, in particular, an ammonia decomposition component. The gas decomposition component includes a MEA 7 including a solid electrolyte 1 and an anode 2 and a cathode 5 that are disposed so as to sandwich the solid electrolyte; Celmets 11s electrically connected to the anode 2; a heater 41 that heats the MEA; and an inlet 17 through which a gaseous fluid containing a gas is introduced into the MEA, an outlet 19 through which the gaseous fluid having passed through the MEA is discharged, and a passage P extending between the inlet and the outlet, wherein the Celmets 11s are discontinuously disposed along the passage P and, with respect to a middle position 15 of the passage, the length of the Celmets disposed is larger on the side of the outlet than on the side of the inlet.
摘要:
Provided are a gas decomposition component in which an electrochemical reaction is used to reduce the running cost and high treatment performance can be achieved; and a method for producing the gas decomposition component. The gas decomposition component includes a cylindrical MEA 7 including an anode 2 on an inner-surface side, a cathode 5 on an outer-surface side, and a solid electrolyte 1 sandwiched between the anode and the cathode; a porous metal body 11s that is inserted on the inner-surface side of the cylindrical MEA and is in contact with the first electrode; and a central conductive rod 11k inserted so as to serve as an electrically conductive shaft of the porous metal body 11s.
摘要:
A porous metal member composed of an alloy at least containing nickel and tungsten is provided. The alloy may contain 50 to 80 wt % of nickel and 20 to 50 wt % of tungsten and may further contain 10 wt % or less of phosphorus and/or 10 wt % or less of boron. Such a porous metal member can be produced by, for example, making a porous base such as a urethane foam be electrically conductive, forming an alloy film containing nickel and tungsten, then removing the porous base from the alloy film, and subsequently reducing the alloy.