摘要:
A particulate matter oxidizing catalyst includes: at least one metal selected from the group consisting of: gallium, manganese, iron, cobalt, nickel, copper, yttrium, zirconium, niobium, molybdenum, silver, lanthanum, praseodymium, neodymium and gold; and cerium, wherein a first oxide includes: the cerium, and a first metal which is at least one element selected from the group consisting of: gallium, manganese, iron, cobalt and nickel, wherein a second oxide includes: the cerium, and a second metal which is at least one element selected from the group consisting of: praseodymium, zirconium and aluminum, and wherein the second oxide and the first oxide have a content ratio of second oxide/(first oxide+second oxide)=0.1 by mass to 0.8 by mass.
摘要:
A particulate matter oxidizing catalyst includes: at least one metal selected from the group consisting of: gallium, manganese, iron, cobalt, nickel, copper, yttrium, zirconium, niobium, molybdenum, silver, lanthanum, praseodymium, neodymium and gold; and cerium, wherein a first oxide includes: the cerium, and a first metal which is at least one element selected from the group consisting of: gallium, manganese, iron, cobalt and nickel, wherein a second oxide includes: the cerium, and a second metal which is at least one element selected from the group consisting of: praseodymium, zirconium and aluminum, and wherein the second oxide and the first oxide have a content ratio of second oxide/(first oxide+second oxide)=0.1 by mass to 0.8 by mass.
摘要:
A fibrous structure (10) of the present invention includes: long fibers (1) composed of an inorganic material; and short fibers (2) composed of the inorganic material and shorter than the long fibers (1), wherein at least one of the long fibers (1) and the short fibers (2) includes catalyst components (4), and a three-dimensional net-like structure is formed by the long fibers (1) and the short fibers (2).
摘要:
A fibrous structure (10) of the present invention includes: long fibers (1) composed of an inorganic material; and short fibers (2) composed of the inorganic material and shorter than the long fibers (1), wherein at least one of the long fibers (1) and the short fibers (2) includes catalyst components (4), and a three-dimensional net-like structure is formed by the long fibers (1) and the short fibers (2).
摘要:
A purifying catalyst includes catalyst powder composed of a transition metal oxide of which an average particle diameter is within 1 nm to 2 μm and in which an electron binding energy of oxygen is shifted to an energy side lower than 531.3 eV. The purifying catalyst shows good purification performance even when noble metal is not contained as an essential component.
摘要:
A purifying catalyst includes catalyst powder composed of a transition metal oxide of which an average particle diameter is within 1 nm to 2 μm and in which an electron binding energy of oxygen is shifted to an energy side lower than 531.3 eV. The purifying catalyst shows good purification performance even when noble metal is not contained as an essential component.
摘要:
An exhaust gas purifying catalyst having a high purifying ability even if noble metal is not used as an essential component, an exhaust gas purifying monolith catalyst, and a method for manufacturing an exhaust gas purifying catalyst, are provided. The exhaust gas purifying catalyst includes an oxide having an oxygen storage and release capacity, and an oxide represented by the following formula (1) supported on the oxide having the oxygen storage and release capacity, LaxM1-xM′O3-δ (1) (wherein La represents lanthanum, M represents at least one element selected from the group consisting of barium (Ba), strontium (Sr) and calcium (Ca), M′ represents at least one element selected from the group consisting of iron (Fe), cobalt (Co), nickel (Ni) and manganese (Mn), δ represents an oxygen deficient amount, and x and δ fulfill conditions represented by 0
摘要:
An exhaust gas purifying catalyst having a high purifying ability even if noble metal is not used as an essential component, an exhaust gas purifying monolith catalyst, and a method for manufacturing an exhaust gas purifying catalyst, are provided. The exhaust gas purifying catalyst includes an oxide having an oxygen storage and release capacity, and an oxide represented by the following formula (1) supported on the oxide having the oxygen storage and release capacity, LaxM1−xM′O3−δ (1) (wherein La represents lanthanum, M represents at least one element selected from the group consisting of barium (Ba), strontium (Sr) and calcium (Ca), M′ represents at least one element selected from the group consisting of iron (Fe), cobalt (Co), nickel (Ni) and manganese (Mn), δ represents an oxygen deficient amount, and x and δ fulfill conditions represented by 0
摘要:
[Object] To provide an oxidation catalyst composition excellent in low temperature activity and a PM oxidation catalyst which can oxidize or burn particulate and the like from an internal combustion engine even at relatively low temperatures. [Solving Means] An oxidation catalyst composition contains cerium, manganese, and a metal M (M is a trivalent metal element excluding cerium). When the oxidation catalyst composition is analyzed by XPS so that orbital energies are subjected to peak separation using the Gaussian function, the Ce4+/Ce3+ atomic weight ratio (atomic % ratio) is 1.7 or higher and Mn2+ is in an amount of 5 atomic % or larger, wherein at least a part of the oxidation catalyst composition forms a composite. The above-mentioned metal M is ytterbium, thulium, erbium, holmium, dysprosium, gadolinium, europium, samarium, promethium, neodymium, praseodymium, scandium, yttrium, aluminum, gallium and/or the like.
摘要:
Herein is provided a fibrous catalyst having a catalytic layer containing particles comprising ceria CeO2, with an average particle size of 1 nm to 1 μm. The layer is coated on the surface of a ceramic fiber. Accordingly, flexibility of the surface of the catalytic layer is improved due to the decreased interaction between the particles due to their minute size. Because flexibility is improved, vibration and deformation does not deteriorate the layer, and as such, the peeling-resistance property is improved.