Mitsui Mining and Smelting Co. | Date: 2014-09-10
The present invention proposes a new exhaust gas purifying catalyst in which gas diffusibility and miscibility in a catalyst layer are high, and thereby excellent catalyst performance can be exhibited. There is proposed an exhaust gas purifying catalyst comprising a catalyst layer comprising two or more types of inorganic porous particles each having a different particle size, a catalytically active component, and voids, wherein;
Mitsui Mining and Smelting Co. | Date: 2014-05-19
Provided is a lithium secondary battery using a positive electrode active material which operates at a charging voltage in a region exceeding 4.3 V, and a novel positive electrode active material for a lithium secondary battery which can further enhance the output characteristics. Proposed is a positive electrode active material for a lithium secondary battery including positive electrode active material particles obtained by equipping the entire surface or a part of the surface of lithium manganese-containing composite oxide particles (also referred to as the core particles) operating at a charging voltage in a region exceeding 4.3 V in a metal Li reference potential with a layer A containing at least Ti, Al, Zr, or two or more kinds of these, and C.
Mitsui Mining and Smelting Co. | Date: 2014-03-13
Provided is a new catalyst structure for exhaust gas treatment including an upper catalyst layer and a lower catalyst layer, in which the catalyst structure can sufficiently exhibit functions as a three way catalyst while maintaining gas diffusibility. Proposed is a catalyst structure including a substrate, an upper catalyst layer, and a lower catalyst layer, the catalyst structure having a first peak or a second peak at a pore volume diameter of 10 nm to 50 nm and a pore volume diameter of 50 nm to 100 nm, respectively, in the logarithmic differential pore volume distribution analyzed by a mercury intrusion porosimeter.
Mitsui Mining and Smelting Co. | Date: 2014-05-15
In an exhaust gas purification catalyst system for use in an automobile including an exhaust gas purification catalyst product disposed in both a front section and a rear section, the exhaust gas purification catalyst product of the front section has a layered catalyst including a lower layer which contains aluminum borate.
Mitsui Mining and Smelting Co. | Date: 2014-04-17
Provided is a catalyst composition using other metals different from noble metals as a catalytic activity component and which has an excellent catalytic activity even after a thermal duration treatment. Provided are an exhaust gas purifying catalyst composition which includes ceria-zirconia particles with a feature in that a peak arising from (111) plane is divided into two peak tops in an XRD pattern and in which a transition metal including at least one of Cu, Cr, Fe, Mn, Co, Ni, and Ag is supported on the ceria-zirconia particles, and a catalyst using the exhaust gas purifying catalyst composition.