CATALER CORPORATION

The present disclosure provides a technology of reducing waviness of a carrying width of a catalyst metal carrying portion in an exhaust gas purification catalyst. A method disclosed herein includes: preparing a base material having an exhaust gas passage; preparing a catalyst metal solution containing a catalyst metal oxidizing or reducing exhaust gas component; supplying the catalyst metal solution to a chemical solution plate so that a bottom surface of the chemical solution plate is not exposed; immersing an end of the base material in the catalyst metal solution supplied to the chemical solution plate; and firing the base material. The bottom surface of the chemical solution plate is provided with grooves in a predetermined pattern, and an average of depths of the grooves is from 1.2 mm to 3 mm inclusive, and an average of widths of the grooves is from 1.6 mm to 3 mm inclusive.

Provided is a heat-resistant three-way catalyst having a catalyst performance and an OSC performance in a compatible manner, and a method for manufacturing the same. Some aspects of the present disclosure relate to a three-way catalyst and a method for manufacturing the same. The three-way catalyst includes a noble metal, an OSC material, and an oxide solid solution comprising barium and zirconium. The noble metal is supported on the OSC material. A mole ratio of barium to zirconium (Ba:Zr) in the oxide solid solution is in a range of 20:80 to 49:51. A content of barium carbonate and barium oxide in the oxide solid solution is 2 weight % or less.

An exhaust gas purifying catalyst whose oxidation activity after long exposure to high temperature is improved is provided. The exhaust gas purifying catalyst disclosed herein includes a parent material including an alumina particle and zirconia that covers at least a part of a surface of the alumina particle, and a catalyst precious metal carried by the parent material and containing at least Pt. The average particle diameter of the zirconia that is obtained by a focused ion beam scanning electron microscope is 50 nm or less. The mole ratio (ZrO 2 /Pt) of the zirconia to the Pt is 8 or more.

Provided is a catalyst for exhaust gas purification that has improved NO x storage performance in a lean atmosphere. A catalyst for exhaust gas purification disclosed herein includes a substrate and a catalyst layer. The catalyst layer includes a lower layer, a middle layer, and an upper layer. The upper layer contains Rh. The middle layer contains at least Pt and a NO x storage material. The lower layer has a lower-layer front portion containing Pd and a lower-layer rear portion containing Pd. The Pd content (C F ) in the lower-layer front portion per L of the substrate is greater than the Pd content (C R ) in the lower-layer rear portion per L of the substrate.

An gas purification catalyst device having a catalyst coated layer formed on at least one base material, wherein: the catalyst coated layer includes a first catalyst coated layer on the upstream side of an exhaust gas flow, and a second catalyst coated layer on the downstream side of the exhaust gas flow; the first catalyst coated layer includes a hydrocarbon adsorbent and a catalytic precious metal; and the second catalyst coated layer includes a nitrogen oxide adsorbent and a catalytic precious metal.

Mesoporous carbon includes a linked structure in which carbon particles are linked. The carbon particles have primary pores and are primary particles. An average entrance diameter of the primary pores is 2.0 nm or more and 3.0 nm or less. An average constriction diameter of the primary pores is 1.6 nm or more and 2.4 nm or less. An electrode catalyst for a fuel cell includes the mesoporous carbon and catalyst particles supported in the primary pores of the mesoporous carbon. A catalyst layer includes the electrode catalyst for a fuel cell and a catalyst layer ionomer.

A particulate filter capable of PM capturing performance and pressure drop suppression function. The filter captures a particulate matter PM contained in exhaust gas. The filter includes: a base material including inlet cells each with an opening at an exhaust gas inlet end, outlet cells each with an opening at an exhaust gas outlet end, and porous partitions partitioning the inlet and outlet cells; and an outercoat layer provided on an inlet surface of each of the partitions. The D 90 pore diameter of pores in the outercoat layer is from 1 μm to 10 μm inclusive. In the outercoat layer, a thickness t 1 of pores is from 20 μm to 80 μm inclusive, and a porosity P coat of the pores is from 30% to 70% inclusive. According to the outercoat layer with such a configuration, the particulate matter PM can be suitably captured with appropriate control of pressure drop increase.

A catalyst for a fuel cell includes a carbon support including a micropore, and a metal supported on the carbon support. The metal is at least one of platinum and a platinum alloy, a specific surface area of the carbon support is 250 m 2 /g-carbon or more and 338 m 2 /g-carbon or less, and an area of the micropore of the carbon support is 48 m 2 /g-carbon or more and 74 m 2 /g-carbon or less.

The present disclosure provides an oxygen storage/release material that has achieved both the improved oxygen storage/release capacity at low temperature and heat tolerance, which comprises a ceria-zirconia-based composite oxide, wherein the ceria-zirconia-based composite oxide further comprises praseodymium (Pr) or neodymium (Nd), and has, in at least a part thereof, at least one ordered phase of κ phase and a pyrochlore phase, a proportion of primary particles having particle diameters of 0.4 μm to 1.5 μm is 40% to 100% on a particle number basis, and, when heated for 5 hours in the air at 1,100° C., I(14/29) value is 0.015 or more and I(28/29) value is 0.08 or less. The present disclosure also relates to a method for producing such oxygen storage/release material.

A method for manufacturing an exhaust gas purification catalyst device includes: (A) placing a catalyst coating layer-forming coating liquid on the upper end surface of a honeycomb substrate having a plurality of cell flow paths partitioned by cell walls in a coating liquid placing station; (B) transferring the substrate from the coating liquid placing station to a suction station; and (C) suctioning the substrate from the lower end surface in the suction station to coat the cell walls of the substrate with the coating liquid, wherein the suction station comprises two or more suction devices, and step (B) comprises (B1) transferring the substrate, on which the coating liquid has been placed, from the coating liquid placing station to a branch station, and (B2) transferring the substrate, on which the coating liquid has been placed, to an empty suction device among the suction devices of the branch station.