Abstract:
A catalyst producing method comprises preparing reverse micellar solution including an aqueous solution containing at least a noble metal element as a catalytic active component, and carrying the catalytic active component by a substrate to establish them into a catalyst precursor; and spraying the emulsion solution containing the catalyst precursor in an inert gas atmosphere to obtain a dried catalyst precursor, and firing the obtained dried catalyst precursor in an air atmosphere. A catalyst is obtained by the catalyst producing method.
Abstract:
A method of producing catalyst powder of the present invention has a step of precipitating a transition metal particle and a base-metal compound in a reversed micelle substantially simultaneously, and a step of precipitating a noble metal particle in the reversed micelle. By this method, it is possible to obtain catalyst powder which restricts an aggregation of noble metal particles even at the high temperature and is excellent in the catalytic activity.
Abstract:
A method of producing catalyst powder of the present invention has a step of precipitating any one of a noble metal particle (5) and a transition metal particle (10) in a reversed micelle (1); a step of precipitating, in the reversed micelle (1) in which any one of the noble metal particle (5) and the transition metal particle (10) is precipitated, a porous support material (7) which supports the noble metal particle (5) and the transition metal particle (10); and a step of precipitating the other of the noble metal particle (5) and the transition metal particle (10) in the reversed micelle (1) in which any one of the noble metal particle (5).
Abstract:
An object is to maintain an effect of enhancing activity of noble metal particles by transition metal without increasing production cost and an environmental load.An exhaust gas purifying catalyst 1 is composed of: noble metal particles 2; first compounds 3 which contact the noble metal particles 2 and suppress movement of the noble metal particles 2; and second compounds 4 which contain the noble metal particles 2 and the first compounds 3, suppress the movement of the noble metal particles 2, and suppress coagulation of the first compounds 3 following mutual contact of the first compounds 3, wherein the first compounds 3 support the noble metal particles 2, and simplexes or aggregates of the first compounds 3 supporting the noble metal particles 2 are included in section partitioned by the second compounds 4.
Abstract:
A catalyst for purifying exhaust gas that provides a superior catalytic performance even at a high temperature by increasing the durability of the promoter. The catalyst for purifying exhaust gas includes a promoter clathrate wherein a promoter component particle is covered with a high heat-resistant oxide. A promoter active species is contained in the promoter clathrate. The catalytic active species are located adjacent to the promoter clathrates. The catalytic active species has a precious metallic particle having a catalyst activity, a metallic oxide particle for bearing the precious metallic particle and a metallic oxide placed around the metallic oxide particle and the precious metallic particle.
Abstract:
A semiconductor memory device for reading data from a selected memory cell. The memory cells are arranged in an array. First bit lines and word lines, coupled to the memory cells, are arranged in a matrix. The word lines select the selected cell. An amplification circuit amplifies the current passing through the selected memory cell and is coupled to the first bit line. A second bit line is coupled to the amplification circuit and carries the amplified current. A sensing circuit coupled to the second bit line senses the current on the second bit line. As a result, the current passing through the selected memory cell is detected.
Abstract:
A semiconductor memory device for reading data from a selected memory cell. The memory cells are arranged in an array. First bit lines and word lines, coupled to the memory cells, are arranged in a matrix. The word lines select the selected cell. An amplification circuit amplifies the current passing through the selected memory cell and is coupled to the first bit. A second bit line is coupled to the amplification circuit and carries the amplified current. A sensing circuit coupled to the second bit line senses the current on the second bit line. As a result, the current passing through the selected memory cell is detected.
Abstract:
A semiconductor memory device for reading stored data from a selected memory cell in the semiconductor device to a sensing amplifier. An array of memory cells is arranged in a matrix, each memory cell including a MOS transistor. Word lines are organized to select groups of the MOS transistors. A plurality of first bit lines are arrayed in a matrix with the word lines. The word lines and bit lines together select the selected memory cell from the array. Each first bit line is coupled to either the source electrode or drain electrode of a plurality of MOS transistors. There is at least one second bit line. Each second bit line is selectively coupled to at least two corresponding first bit lines. A first bit line selection circuit selectively couples one of the first bit lines to a corresponding second bit line. A first power source line is coupled to the other of the source and drain of the array of the MOS transistors. A second bit line select means selectively couples a second bit line to the sensing amplifier.
Abstract:
A semiconductor memory device for reading stored data from a selected memory cell in the semiconductor device to a sensing amplifier. An array of memory cells is arranged in a matrix, each memory cell including a MOS transistor. Word lines are organized to select groups of the MOS transistors. A plurality of first bit lines are arrayed in a matrix with the word lines. The word lines and bit lines together select the selected memory cell from the array. Each first bit line is coupled to either the source electrode or drain electrode of a plurality of MOS transistors. There is at least one second bit line. Each second bit line is selectively coupled to at least two corresponding first bit lines. A first bit line selection circuit selectively couples one of the first bit lines to a corresponding second bit line. A first power source line is coupled to the other of the source and drain of the array of the MOS transistors. A second bit line select means selectively couples a second bit line to the sensing amplifier.