WO2005090238A1 - ペロブスカイト型複合酸化物、触媒組成物およびペロブスカイト型複合酸化物の製造方法 - Google Patents
ペロブスカイト型複合酸化物、触媒組成物およびペロブスカイト型複合酸化物の製造方法 Download PDFInfo
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Definitions
- the present invention relates to a method for producing a perovskite-type composite oxide, a key substance and a perovskite-type composite oxide, and more specifically, a perovskite-type composite oxide and a catalyst containing the perovskite-type composite oxide.
- the present invention relates to a method for producing the perovskite-type composite oxide.
- Perovskite-type composite oxide is a composite oxide having a crystal structure represented by the general formula ( 3 ), and is widely used as a ceramic material in various industrial fields.
- the perovskite-type composite oxide of 5 O 3 allows Pd to reversibly enter and exit the perovskite-type crystal structure in response to fluctuations in the oxidation-reduction of the exhaust gas.
- it has been reported that it suppresses U.S.A. and maintains high activity for a long time Y. Ni shihata hatt al., Nature, Vol. 418, No. 6).
- the general formula AB (1 one y) Pd y 0 3 perovskite-type composite oxide at the time of its manufacture, be formulated raw material at the rate of exactly the same amount, occasionally, the solid drunk of Pd Such as decline The quality may be unstable, and it is urgently desired to stably produce Pd with a high solid solution rate. Disclosure of the invention
- An object of the present invention is to provide a perovskite-type composite oxide having a high solid solution rate of Pd and a stable quality, a method for producing the perovskite-type composite oxide, and a method for producing the perovskite-type composite oxide.
- the purpose of the present invention is to share a titanium oxide containing a complex oxide.
- the perovskite-type composite oxide of the present invention is represented by the following general formula (1).
- A represents at least one element selected from rare earth elements and alkaline earth chains, and B represents at least one element selected from transition elements (excluding rare earth elements and Pd.)
- a 1 and Si A 1 and Si.
- X indicates the atomic ratio of X and Y, and y indicates the atomic ratio of 0 ⁇ y ⁇ 0.5, (5 indicates the free form.)
- perovskite-type composite oxide of the present invention is characterized by being represented by the following general formula (2).
- ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ represents at least one element selected from La, Nd, and Y
- k represents at least one element selected from a rare earth element and an alkaline earth metal
- La, Nd, Y A e represents at least one element selected from Ce, Pr, T b
- B represents at least one selected from Mn, Fe, Co
- a 1 B ′ represents at least one element selected from transition elements (excluding rare earth elements, Mn, Fe, Co, Al, and Pd) and Si.
- transition elements excluding rare earth elements, Mn, Fe, Co, Al, and Pd
- b indicates the atomic ratio in the numerical range of 0 ⁇ b ⁇ 0.5
- a + b indicates 1 ⁇ a + b ⁇ l 3 indicates the atomic ratio in the numerical range of 3
- c indicates the atomic ratio in the numerical range of 0 ⁇ c ⁇ 0.2
- q indicates the atomic ratio in the numerical range of 0 ⁇ q ⁇ 0.5
- r Indicates the atomic ratio in the numerical range of 0 ⁇ r ⁇ 0.5, and 5 indicates Shows ⁇ ⁇ .
- the present invention also includes a pirates containing the above-described perovskite-type composite oxide. Further, this catalyst is used as an exhaust gas purifying catalyst. In addition, it is preferably used as a coupling reaction of mmn.
- the present invention also includes a method for producing a perovskite-type composite oxide in which a raw material is formulated based on each atomic ratio of the belovskite-type composite oxide represented by the following general formula (1).
- A represents at least one element selected from rare earth elements and alkaline earth elements
- B represents at least one element selected from transition elements (excluding rare earth elements and Pd.)
- X represents one element
- X represents the atomic ratio of X
- y represents the atomic ratio of 0 ⁇ y ⁇ 0.5
- (5 represents the oxygen »!] Minute.
- the raw material is formulated so that the atomic ratio of the element coordinated to the A site exceeds 1
- Pd is stably solidified at a high solid solution rate. Can be dissolved. Therefore, a material having a high solid solution rate of Pd can be stably manufactured.
- the method for producing a perovskite-type compound according to the present invention even if the raw material containing the constituent element of the A site is lost during the production, the atomic ratio of the element coordinated to the A site is 1%. Since the raw material is formulated so as to exceed the above, it is possible to prevent the atomic ratio of the A site from becoming smaller than the atomic ratio of the B site. Therefore, a material having a high solid solution rate of Pd can be manufactured stably.
- the perovskite-type composite oxide of the present invention has a high solid solution rate of Pd and can provide stable quality.
- the vulgarite of the present invention contains a perovskite-type compound of stable quality, self-renewal of Pd can be ensured stably, and excellent brutality over a long period of time can be obtained. A certain activity can be maintained.
- the perovskite-type composite oxide of the present invention is represented by the following general formula (1).
- A represents at least one element selected from rare earth elements and alkaline earth metals, and B represents a transition element (excluding rare earth elements and Pd.)
- a 1 and Si X represents at least one element
- X represents the atomic ratio of 1 and X
- y represents the atomic ratio of 0 and y ⁇ 0.5
- 5 represents oxygen ii ij.
- the constituent element of A is
- examples of the rare earth element represented by A include Sc (scandium), Y (yttrium), La (lanthanum), Ce (cerium), Pr (praseodymium), Nd (neodymium), and Pm (Promethium), Sm (samarium), En (europium), Gd (gadolinium), Tb (tenorevium), Dy (dysprosium), Ho (holmium), Er (erbium), Tm (perium), Yb (ytterbium) , Lu (lutetium).
- Y, La, Nd, Ce, Pr, Tb and more preferably, Y, La, Nd.
- These rare earth elements may be used in the workplace, or two or more kinds may be used in combination.
- examples of the alkaline earth ⁇ M represented by A include Be (beryllium), Mg (magnesium), Ca (calcium), Sr (strontium), Ba (barium), Ra ( Radium) and the like.
- alkaline earths may be used alone or in combination of two or more.
- A is preferably an alkaline earth used in an atomic ratio of 0.5 or less with respect to the rare earth element.
- the element coordinated to the A site is preferably selected from rare earth elements.
- the atomic ratio X of the element (rare earth element and / or alkaline earth metal) coordinated at the A site exceeds 1 ⁇ x, that is, exceeds 1.00.
- X is preferably 1.00 ⁇ 1. ⁇ 1.50, more preferably 1.00 ⁇ 1.30.
- examples of the transition element excluding the rare earth element and Pd represented by B include, for example, an atomic number of 22 (T i) to an atomic number of 30 in the periodic table (I UPAC, 1990). (Zn), elements of atomic number 40 (Zr) to atomic number 48 (Cd), and elements of atomic number 72 (Hf) to atomic number 80 (Eg) (excluding Pd).
- the element coordinated to the B site is Pd is an essential element, preferably, Cr (chromium), Mn (manganese), Fe (iron), Co (conoleto), Ni (nickel), Cu (copper), Zn ( ⁇ ) and A1 (aluminum). And more preferably selected from Mn, Fe, Co and A1.
- the atomic percentage y of Pd coordinated at the B site is 0 ⁇ y ⁇ 0.5, that is, 0.5 or less. If the atomic ratio of Pd exceeds 0.5, it becomes difficult for Pd to form a solid solution! There is also an increase in costs.
- the perovskite-type composite oxide of the present invention is more preferably represented by the following general formula (2).
- A represents at least one element selected from La, Nd and Y, and A ′ represents at least one element selected from rare earth elements and alkaline earth metals (La, Nd, Y , Ce, Pr ⁇ Tb), A ⁇ represents at least one element selected from Ce, Pr, Tb, and B represents at least one selected from Mn, Fe, Co, A1 B ′ represents at least one element selected from transition elements (excluding rare earth elements, Mn, Fe, Co, Al, and Pd) and Si.
- 0.5 ⁇ a ⁇ l.3 indicates the atomic ratio in the numerical range of 3; b indicates the atomic ratio in the range of 0 ⁇ b ⁇ 0.5; a + b indicates 1
- the atomic ratio a of A is in the numerical range of 0 ⁇ 5 ⁇ a ⁇ l.3.
- A the atomic ratio of A 'is in the numerical range 0 ⁇ b ⁇ 0.5
- a + b is l ⁇ a + b ⁇ l. 3 Therefore, the atomic ratio z as (A a A ' b A " c ) always exceeds 1.00, It is in the numerical range of 5.
- Atomic ratio of A a A 'b A ⁇ J is 1. If it is 00 or less, as described above, the P d, can not be stably dissolved at a high rate of solid solution. Further, If the numerical range of a + b exceeds 1.3, by-products other than the perovskite complex may be generated.
- z is preferably 1.00 ⁇ 1.50, and more preferably 1.00 and z ⁇ 1.30.
- At least one of b, c, and q is preferably 0, and more preferably, all of b, c, and q are 0.
- Such a perovskite-type complex is not particularly limited and may be any suitable method for preparing a complex oxide, such as a coprecipitation method, a quench method, or an alkoxide method. Depending on how it can be manufactured.
- a mixed salt aqueous solution containing the salts (raw materials) of the above-described elements in the above stoichiometric ratio was prepared, and a neutralizing agent was added to the mixed: i ⁇ k solution and coprecipitated. Thereafter, the obtained coprecipitate is dried and then processed.
- the salt of each element examples include inorganic salts such as sulfates, nitrates, chlorides, and phosphates, and organic salts such as acetates and oxalates.
- the mixed solution can be prepared, for example, by adding a salt of each element to water in such a ratio as to have the above stoichiometric ratio and stirring and mixing.
- this mixture ⁇ ⁇
- a neutralizing agent examples include ammonia, organic bases such as amines such as triethylamine and pyridine, and the like.
- examples include inorganic bases such as caseida, casei, potassium carbonate, and ammonium carbonate.
- the neutralizing agent was added so that the pH of the solution after adding the neutralizing agent was about 6 to 10.
- the obtained coprecipitate is washed with water if necessary, and dried by, for example, vacuum or ventilation, and then, for example, about 500 to 100 ° C., preferably about 600 ° C.
- a perovskite-type composite oxide can be obtained.
- the citrate mixed ⁇ ⁇ solution is dried to form a citric acid form of each of the above-mentioned elements, and the obtained citric acid H form is heated.
- Examples of the salt of each element include the same salts as described above.
- the mixed solution of citrate for example, prepare an intense night of mixing in the same manner as above, and add an aqueous solution of citrate to the intense night of mixing. Thus, it can be prepared.
- the mixture of cunic acid 3 ⁇ 4
- the solid is dried to form quench bodies of the above-mentioned elements. Drying is an SS in which the formed citrate is not decomposed, for example, at room temperature to about 150 ° C., to quickly remove water. Thereby, a citrate complex of each of the above elements can be formed.
- the formed quenched body is heated after being formed.
- Temporary heating may be performed, for example, by heating at 250 ° C. or more in a vacuum or an inert atmosphere.
- a perovskite-type composite can be obtained by treating at about 300 to 100 ° C., preferably about 600 to 950 ° C.
- a mixed alkoxide intense night containing the alkoxides (raw materials) of the above-described elements except the noble metal containing Pd at the above stoichiometric ratio is prepared, and the mixed alkoxide solution is added to the mixed alkoxide solution.
- An aqueous solution containing a salt of a noble metal containing d (raw material) is added, and the mixture is decomposed by carohydrate decomposition.
- the obtained product is dried and then heat-treated.
- alkoxide of each element examples include an alcoholate formed from each element and an alkoxy such as methoxy, ethoxy, propoxy, isopropoxy, and butoxy, and an alkoxy alcoholate of each element represented by the following general formula (3). And the like.
- E [O CH (R 1 )-(CH 2 ) i- OR 2 ] d (3) (Wherein, E represents each element, R 1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R 2 represents an alkyl group having 1 to 4 carbon atoms, and i represents 1 to An integer of 3 and j represents an integer of 2 to 3.
- alkoxy alcohol examples include, for example, methoxyethylate, methoxypropylate, methoxybutyrate, ethoxyxylate, ethoxypropylate, propoxyxethylate, butoxyxethylate and the like.
- the mixed alkoxide solution can be prepared, for example, by adding the alkoxide of each element to the organic solvent so as to have the above stoichiometric ratio, and mixing with stirring.
- the organic solvent is not particularly limited as long as it can dissolve the alkoxide of each element.
- aromatic hydrocarbons, aliphatic hydrocarbons, alcohols, ketones, esters, and the like are used.
- hydrogen aromatics such as benzene, toluene, and xylene are used.
- an aqueous solution containing a salt of a noble metal containing Pd at the above stoichiometric ratio is added to the mixed alkoxide solution and transported.
- Aqueous solutions containing noble salts containing Pd include, for example, nitric acid ⁇ 7] ⁇ strong night, chloride aqueous solution, hexammine chloride aqueous solution, dinitrodiammine nitrate ⁇ ⁇ solution, hexachloro ⁇ hydrate, potassium cyanide And the like.
- asparagus is fiberized by, for example, vacuum drying or ventilation drying, for example, about 500 to: L0000 ° C, preferably about 500 to 850 By heating at ° C
- a perovskite-type composite oxide can be obtained.
- a solution containing an organic ⁇ M salt of a noble metal containing Pd (raw material) is mixed with the above mixed alkoxide solution to prepare a uniform mixed solution, and water is added thereto. After the addition, the obtained product can be prepared by further processing.
- an organic ⁇ salt of noble ⁇ S containing Pd for example, a noble metal carboxylate containing Pd formed from acetate, propionate, etc., for example, the following general formula (4) or the following general formula
- Noble metal chelate complexes containing Pd such as a noble metal diketone complex containing Pd formed from the diketone compound shown in (5).
- R 3 is an alkyl group having 1 to 4 carbon atoms, a fluoroalkyl group having 1 to 4 carbon atoms or
- the aryl group R 4 represents an alkyl group having 1 to 4 carbon atoms, a fluoroalkyl aryl group having 1 to 4 carbon atoms or an alkyloxy
- R 5 having 1 to 4 carbon atoms represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.
- R 6 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.
- the alkyl group having 1 to 4 carbon atoms of R 3 , R 4 , R 5 and R 6 includes, for example, methyl, ethyl, propyl, isopropyl, n- Butyl, s-butyl, t-butyl and the like.
- the fluoroalkyl group having 1 to 4 carbon atoms of R 3 and R 4 include trifluoromethyl and the like.
- the aryl group for R 3 and R 4 include phenyl.
- the alkyloxy group having 1 to 4 carbon atoms for R 3 include methoxy, ethoxy, propoxy, isopropoxy, n-butoxy, s-butoxy and t-butoxy.
- Diketonization ⁇ r is, more specifically, for example, 2,4-pentanedione, 2,4-hexandione, 2,2-dimethyl-13,5-hexanedione, 1-Fe2,1, 3-butanedione, 1-trifluoromethyl-1,3-butanedione, hexafluoroacetylaceton, 1,3-diphenyl-1,3-propanedione, dipivaloylmethane, methyla Cetacetate, ethyl acetate, t-butyl acetate, and the like.
- an organic wing salt of a precious metal containing Pd for example, adding an organic salt of precious metal containing Pd to an organic solvent so as to have the above stoichiometric ratio, Can be prepared.
- the organic solvent include the above-mentioned organic solvents.
- the thus-prepared solution containing the noble metal salt containing Pd is mixed with the mixed alkoxide solution described above to prepare a homogeneous mixed solution, and water is added thereto to precipitate the solution.
- the obtained solid is dried, for example, by vacuum drying or ventilation, and then, for example, about 400 to 100 ° C., preferably about 500 to 850 ° C.
- a perovskite-type composite oxide can be obtained.
- the perovskite-type composite oxide of the present invention can be obtained from the above-mentioned stoichiometric ratio from elements other than noble metals including Pd by the above-mentioned coprecipitation method, quench body method, and alkoxide method. And preparing the perovskite-type composite oxide. Alternatively, it can be obtained by supporting a noble metal containing Pd at the above stoichiometric ratio.
- the perovskite-type composite oxide can be loaded with a noble metal containing Pd without any particular limitation, and a known method can be used. For example, a solution of a salt containing a noble metal containing Pd is prepared, and the composite solution is impregnated with a perovskite-type composite, and then washed.
- the above-mentioned salt solution may be used, and practically, nitrate aqueous solution, dinitrodiammine nitric acid solution, chloride aqueous solution and the like can be mentioned.
- examples of the palladium salt solution include, for example, an aqueous solution of palladium nitrate, a solution of dinitrodiammine palladium nitrate, and a solution of tetravalent palladium ammonium nitrate.
- the temperature is maintained at 50 to 200 ° C for 1 to 48 hours, and then at 350 to 100 ° C for 1 to 48 hours. Bake for 12 hours.
- the perovskite-type duplex compound is manufactured in this manner, the raw materials are formulated so that the atomic ratio of the element coordinated to the A site exceeds 1, and the obtained perovskite of the present invention is obtained.
- the atomic ratio of the element coordinated to the A site exceeds 1. Therefore, according to the method for producing a bevelovskite complex of the present invention, Pd can be stably dissolved at a high solid solution rate, while Pd has a high solid solution rate. Can be manufactured stably.
- the method for producing a perovskite-type composite of the present invention even if the raw material containing the constituent element of the A site is lost in the fiber, the atomic ratio of the element coordinated to the A site is reduced. Since the raw material is formulated so as to exceed 1, it is possible to prevent the atomic ratio of the A site from becoming smaller than the atomic ratio of the B site. Therefore, Pd having a high solid solution rate can be stably manufactured.
- the obtained perovskite-type composite oxide of the present invention has a high solid solution rate of Pd and can be provided with stable quality.
- the perovskite-type composite oxide of the present invention is not particularly limited, and can be used in various industrial fields.
- the perovskite-type composite oxide of the present invention has high catalytic activity for Pd, and since Pd is self-regenerating, it can be used as an extinguisher!
- Pd is self-regenerating
- 3 ⁇ 4 may be used as it is, or may be used together with other components, depending on its purpose and use. Is also good.
- the use of the catalyst is not particularly limited, and can be widely used in the field of using Pd as a catalyst.
- a natural coupling reaction for example, there may be mentioned a natural coupling reaction, a reduction reaction catalyst, a hydrogenation catalyst, a hydrocracking catalyst, or a catalyst for purifying exhaust gas from Naikaku.
- a natural coupling reaction for example, a reduction reaction catalyst, a hydrogenation catalyst, a hydrocracking catalyst, or a catalyst for purifying exhaust gas from Naikaku.
- self-regeneration of Pd can maintain high catalytic activity for a long period of time, and can realize excellent exhaust gas purification performance.
- examples of the exhaust gas purifying nada of the inner city include an exhaust gas purifying touch for automobiles.
- the perovskite-type compound of the present invention When used as a catalyst for exhaust gas purification, it is usually prepared in a free form by a known method such as being supported on a tactile body.
- the carrier for example, a known carrier such as a honeycomb monolith carrier made of cordierite or the like is used.
- water is added to form a slurry, which is then coated on the IS body, and then heat-treated at about 300 to 800 ° C, preferably about 300 to 600 ° C. I do.
- the mixture was stirred at room temperature for 2 hours, and toluene and water were distilled off therefrom to obtain a precursor of a LaFePd composite oxide.
- the precursor was transferred to a petri dish, dried by ventilation at 60 ° C for 24 hours, and then processed in air at 800 ° C for 1 hour using an electric furnace to obtain a black-brown powder.
- Example 2 Thereafter, the same operation as in Example 1 was performed to obtain a black-brown powder.
- a mixed alkoxide solution was prepared by adding 25.3 g (0.090 mol) of iron methoxyethylate to a round bottom flask having a capacity of 50 OmL, adding 20 OmL of toluene and stirring and dissolving. Then, 3.05 g (0.010 mol) of palladium acetyl acetate is dissolved in 10 OmL of toluene, and this nada is further added to the mixed alkoxide solution in a round-bottom flask, and the mixture is uniformly mixed with LaNdFePd. A solution was prepared.
- Nitric acid 38.4 g (0.095 mol)
- Aqueous solution of palladium nitrate (Pd content: 4.399% by mass) 12.
- l g (0.53 g in 1 sq., Equivalent to 0.005 mol)
- the citrate mixed solution was evaporated to dryness in an oil bath at 60 to 80 ° C. while vacuuming with a rotary evaporator, and when the solution became candy in about 3 hours, the oil bath was removed. The temperature was slowly raised and finally vacuum dried at 250 ° C for 1 hour to obtain a citrate.
- the obtained citrate complex was calcined at 300 ° C for 3 hours in air. After crushing in a mortar, The powder was calcined at 700 ° C for 3 hours in the air to obtain a powder.
- the obtained coprecipitate was calcined at 120 ° C for 12 hours and then at 700 ° C for 3 hours in the air to obtain a tree.
- Example 2 Thereafter, the same operation as in Example 1 was performed to obtain a black-brown powder.
- Example 2 Thereafter, the same operation as in Example 1 was performed to obtain a black-brown powder.
- Example 5 a powder was obtained by the same operation as in Example 5. Incidentally, in the operation of the first to prepare this powder, the powder X-ray powder diffraction measurement was o As a result, La. 05 Co 0. Of 95 Pd 0, 05 O 3 + tf perovskite type structure It was identified as a single crystalline phase composed of a composite oxide. The specific surface area was 23.4 m 2 / g, and the Pd content in the composite oxide was 2.09% by mass.
- a mixed alkoxide solution was prepared by adding 19.4 g (0.095 mol) of aluminum i-propoxide to a 50 OmL capacity round-bottom flask, adding and stirring and dissolving 20 OmL of toluene. Then, 1.52 g (0.005 mol) of palladium acetyl acetate is dissolved in 10 OmL of toluene, and this solution is further added to the konoxide alkoxide solution in a round-bottomed flask to obtain a homogeneous mixed solution containing LaCaAlPd. Was prepared.
- Example 2 Thereafter, the same operation as in Example 1 was performed to obtain a black-brown powder.
- Example 2 Thereafter, a black-brown powder was obtained by the same operation as in Example 1. 20 g of this powder was impregnated with Pd using 4.27 g (? (0.42 g at 1)) of an aqueous solution of palladium nitrate (Pd content: 9.83% by mass) and then ventilated at 60 ° C for 24 hours. After the orchid was crushed, the powder was heat-treated at 500 ° C for 1 hour in the air using an electric furnace to obtain a powder.
- Pd content aqueous solution of palladium nitrate
- Test piece 30 mm in diameter, 50 mm in length, 6 mil, 400 cell honeycomb, Crane Example 1 and 2 and Comparative Examples 1 and 2 containing Pd-containing perovskite-type complexed compound per liter of exhaust gas purification catalyst was supported such that the Pd content of the resultant was 3.2 g.
- the exhaust gas purifying catalysts of Male Examples 1 and 2 and Comparative Examples 1 and 2 obtained above were installed in a single bank of a V8 8-cylinder 4 L engine, respectively. After repeating a one-cycle endurance pattern at 1000 ° C for 30 seconds for 40 hours, annealing was performed at 900 ° C for 2 hours at an A / F ratio of 14.3.
- ⁇ was measured using a thermocouple inserted into the center of the honeycomb carrier.
- the fuel gasoline
- the addition amount of the phosphorus compound was set such that 50 mg of the phosphorus element in terms of the phosphorus element adhered to the exhaust gas purifying catalyst during the 40 hours of durability.
- test pieces were put into the cylinder-type converter, and durability treatment was performed at the same time.
- the fluctuation model gas was raised at a rate of 20 ° C / min, and was used as a catalyst for exhaust gas elimination in difficult examples 1 and 2 of the durability test and comparative examples 1 and 2.
- the HC, CO, and N ⁇ x in the supplied and exhaust gas were measured as the 50% purification temperature when they were reduced by 50%. The results are shown in Table 2.
- the space velocity (SV) was set to 35000 / h, and the A / F value was set to 14.6 ⁇ 0.5 (0.5 Hz).
- the Pd-containing perovskite-type composite oxide obtained in Sickle Examples 1 and 2 and Comparative Examples 1 and 2 was 6 x 10 to 15 mol (3 x 10 to 16 mol as Pd, that is, 4-promonisole (Equivalent to 0.025 mol% as Pd) was added thereto, and the mixture was heated to a calo using a mantle heater and heated to reflux at 100 ° C for 10 hours.
- Modified ⁇ (%) 4-methoxybiphenyl / 4-promoisole + 4-methoxybiphenyl (Preliminary measurement of toluene solution of 4-methoxybiphenyl and 4-promoisole The relative sensitivity was determined and corrected.)
- the perovskite-type composite oxide of the present invention can be widely used in the field of using Pd as a catalyst, and is used for coupling reaction catalysts for organic synthesis, reduction reaction, hydrogenation catalyst, Alternatively, it can be used directly as an exhaust gas purification catalyst for an internal combustion engine such as an automobile exhaust gas purification catalyst.
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Abstract
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US10/593,827 US7601325B2 (en) | 2004-03-22 | 2005-03-18 | Perovskite-type composite oxide, catalyst composition and method for producing perovskite-type composite oxide |
CN2005800076372A CN1930088B (zh) | 2004-03-22 | 2005-03-18 | 钙钛矿型复合氧化物、催化剂组合物及钙钛矿型复合氧化物的制造方法 |
JP2006511332A JP4953813B2 (ja) | 2004-03-22 | 2005-03-18 | ぺロブスカイト型複合酸化物、触媒組成物およびぺロブスカイト型複合酸化物の製造方法 |
EP05721526A EP1728766A4 (en) | 2004-03-22 | 2005-03-18 | PEROVSKIT-TYPE MIXED OXIDE, CATALYST COMPOSITION AND METHOD FOR PRODUCING THE PEROVSKIT-TYPE MIXED OXIDE OXIDE |
KR1020067019602A KR101115297B1 (ko) | 2004-03-22 | 2006-09-22 | 페로브스카이트형 복합 산화물, 촉매 조성물 및 페로브스카이트형 복합 산화물의 제조방법 |
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JPWO2009041207A1 (ja) * | 2007-09-26 | 2011-01-20 | 株式会社ユニバーサルエンターテインメント | 金属複合酸化物粉末の製造方法 |
JP2011011999A (ja) * | 2009-06-30 | 2011-01-20 | Hokko Chem Ind Co Ltd | 化合物の合成方法および合成反応触媒 |
WO2011001884A1 (ja) * | 2009-06-30 | 2011-01-06 | 北興化学工業株式会社 | 化合物の合成方法および合成反応触媒 |
CN110394182A (zh) * | 2018-04-24 | 2019-11-01 | 丰田自动车株式会社 | 储氧材料及其制造方法 |
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KR20070004765A (ko) | 2007-01-09 |
US7601325B2 (en) | 2009-10-13 |
KR101115297B1 (ko) | 2012-03-05 |
JPWO2005090238A1 (ja) | 2008-01-31 |
EP1728766A1 (en) | 2006-12-06 |
CN1930088A (zh) | 2007-03-14 |
CN1930088B (zh) | 2010-06-23 |
JP4953813B2 (ja) | 2012-06-13 |
EP1728766A4 (en) | 2009-04-22 |
US20070213208A1 (en) | 2007-09-13 |
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