Kabushiki Kaisha Toyota Chuo Kenkyusho

Toyota Jidosha Kabushiki Kaisha

Cataler Corporation

Admatechs Company Limited

Akihiko Suda

Akira Morikawa

Toshitaka Tanabe

Hiromasa Suzuki

Masahide Miura

Isao Chinzei

Miho Hatanaka

Akiya Chiba

Naoki Takahashi

Hideo Sobukawa

Kosuke Iizuka

Kae Yamamura

Toshio Yamamoto

Kimitoshi Sato

Kae Konishi

Toshio Kandori

Takeru Yoshida

Hirotaka Ori

Mitsuyoshi Okada

Yoshio Ukyo

Takeshi Nobukawa

Masahiro Taguchi

Mareo Kimura

Hiroaki Hayashi

Yuki Aoki

Toshiyuki Tanaka

Oji Kuno

Masahiro Sugiura

Tadashi Suzuki

Yoshinori Saito

Yusuke Watanabe

Yasuo Takada

Nobutaka Tomita

Kiyoshi Yamazaki

Takatoshi Suzuki

Tatsuo Fukano

Masayuki Fukui

Yuji Sakakibara

Yoshiro Hayashi

Ryuuichi Masuda

Yusuke Akimoto

Naohiro Terao

Kenji Kaida

Hirohito Hirata

Takeshi Morikawa

Takao Tani

Hiroshi Hirayama

Satoshi Nagao

Daisuke Ochiai

Yasutaka Nagai

Yasuo Ikeda

Takahiro Hayashi

Hirotaka Yonekura

Yoshiyuki Sakamoto

Kimiyasu Ono

Yoshihide Watanabe

Haruo Imagawa

Naoki Kumatani

Masanao Sato

Tomiko Mori

Ryuta Fujii

Tetsushi Ohmura

Chika Ando

Yoriko Matsuoka

A particulate material with a composition expressed by MAlXin which 'M' includes one or more elements selected from the group consisting of Ti, V, Cr, Zr, Nb, Mo, Hf and Ta and 'X' includes C or one or more chemical structures selected from the group consisting of CN(where &#x201c;x&#x201d; is 0&#x3c;&#x201c;x&#x201d;&#x2264;1.0), wherein: &#x201c;a&#x201d; is two or three; &#x201c;b&#x201d; is more than 0.02; and &#x201c;c&#x201d; is from 0.8 to 1.2 when &#x201c;a&#x201d; is two; or &#x201c;c&#x201d; is from 1.8 to 2.6 when &#x201c;a&#x201d; is 3. The particulate material has thicknesses whose average value is from 3.5 nm or more to 20 nm or less, and sizes, [{(longer sides)+(shorter sides)}/2], whose average value is from 50 nm or more to 300 nm or less.

'MXene' particulate material, slurry, secondary battery, transparent electrode and production process for 'MXene' particulate material

A particulate material with a composition expressed by TiAl(CN)(where 'x' is more than 0.02, 'y' is 0&#x3c;&#x201c;y&#x201d;&#x3c;1.0, and &#x201c;z&#x201d; is from 0.8 to 1.20), the particulate material comprising layers including gap layers providing an interlayer distance of from 0.59 nm to 0.70 nm within a crystal lattice; and/or with another composition expressed by TiAl(CN)(where &#x201c;x&#x201d; is more than 0.02, &#x201c;y&#x201d; is 0&#x3c;&#x201c;y&#x201d;&#x3c;1.0, and &#x201c;z&#x201d; is from 1.80 to 2.60), the particulate material comprising layers including gap layers providing an interlayer distance of from 0.44 nm to 0.55 nm within a crystal lattice.

'MXene' particulate material, production process for the same and secondary battery

A ceria-zirconia-based composite oxide containing a composite oxide of ceria and zirconia is provided, in which primary particles having a particle diameter of 1.5 to 4.5 &#x3bc;m account for, on a particle number basis, at least 50% of all primary particles in the ceria-zirconia-based composite oxide, and the molar ratio of cerium to zirconium in the ceria-zirconia-based composite oxide is between 43:57 and 55:45.

Ceria-zirconia-based composite oxide and method for producing same, and exhaust gas purification catalyst including ceria-zirconia-based composite oxide

The object of the present invention is to provide an exhaust gas purifying catalyst that can achieve high purification performance while suppressing HS emissions. The object is solved by an exhaust gas purifying catalyst in which the lower layer of the catalyst coating layer comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % in relation to the total cation amount, and the molar ratio of (cerium+additional element):(zirconium) is within the range from 43:57 to 48:52.

Exhaust gas purifying catalyst

The object of the present invention is to provide an exhaust gas purifying catalyst that can achieve high purification performance while suppressing HS emissions. The object is solved by an exhaust gas purifying catalyst in which the top layer of a catalyst coating layer comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % in relation to the total cation amount, and the molar ratio of (cerium+additional element):(zirconium) is within the range from 43:57 to 48:52.

An oxygen storage/release material includes: a ceria-zirconia composite oxide porous body that has at least one ordered phase of a pyrochlore phase and a &#x3ba; phase, and that has a central pore diameter of 70 nm to 1 &#x3bc;m as measured by a mercury penetration method, and in which a cumulative pore volume of pores that each have a pore diameter in the range of 0.5 times to 2 times the central pore diameter is 40% or more of the cumulative pore volume of pores that each have a pore diameter in the range of 10 nm to 10 &#x3bc;m as measured by the mercury penetration method.

Oxygen storage/release material

The object of the present invention is to provide a high-performance exhaust gas purifying catalyst that can achieve oxygen absorption/release capacity and NOx purification performance. The object is solved by an exhaust gas purifying catalyst, which comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure in the upstream part of the catalyst coating layer, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % of the total cation amount, and has a molar ratio of (cerium+the additional element):(zirconium) of 43:57 to 48:52.

A ceria-zirconia composite oxide includes at least one of lanthanum, yttrium, and praseodymium. A rate of a total content of the at least one rare earth element to a total content of cerium and zirconium is 0.1 at % to 4.0 at %. A content of the rare earth element present in near-surface regions, which are at a distance of less than 50 nm from surfaces of primary particles of the ceria-zirconia composite oxide, accounts for 90 at % or more of the total content of the rare earth element. An average particle size of the primary particles of the ceria-zirconia composite oxide is 2.2 &#x3bc;m to 4.5 &#x3bc;m. After a predetermined durability test, the intensity ratio I(14/29) of a diffraction line at 2&#x3b8;=14.5&#xb0; to a diffraction line at 2&#x3b8;=29&#xb0; and the intensity ratio I(28/29) of a diffraction line at 2&#x3b8;=28.5&#xb0; to the diffraction line at 2&#x3b8;=29&#xb0; respectively satisfy the following conditions:(14/29)&#x2265;0.02, and(28/29)&#x2264;0.08.

Ceria-zirconia composite oxide, method for producing the same, and catalyst for purifying exhaust gas using the ceria-zirconia composite oxide

Iron compound particles comprise a &#x3b2;-FeOOH crystal phase and a metal element other than Fe with which the &#x3b2;-FeOOH crystal phase is doped, wherein the metal element other than Fe is at least one metal element selected from the group consisting of elements of Al as well as 3d and 4d transition metals belonging to periodic table Groups 4 to 12 other than Fe, an atomic ratio of the metal element other than Fe to the Fe element (metal element other than Fe/Fe element) is 0.001 to 0.5, and the iron compound particles satisfy at least one of the following requirements (A) and (B):

Iron compound particles, method for producing the iron compound particles, and oxidation catalyst using the iron compound particles

A ceria-zirconia-based composite oxide including a composite oxide containing ceria and zirconia, wherein the ceria-zirconia-based composite oxide contains at least one member selected from the group consisting of praseodymium, lanthanum, and yttrium in an amount of 0.5 to 5.0 mol % relative to a total amount of the cations contained in the ceria-zirconia-based composite oxide, where the ratio of the content of both cerium and the at least one member selected from the group consisting of praseodymium, lanthanum, and yttrium in the ceria-zirconia-based composite oxide to the content of zirconium therein ([cerium and the at least one member selected from the group consisting of praseodymium, lanthanum, and yttrium]:[zirconium]) is in the range of 43:57 to 48:52 by mole ratio.

Ceria-zirconia-based composite oxide and method for producing same, and catalyst for exhaust gas purification including ceria-zirconia-based composite oxide

A porous composite metal oxide, including a mixture of first ultrafine particles containing alumina and second ultrafine particles containing zirconia, wherein the first ultrafine particles and the second ultrafine particles are uniformly dispersed in such a way as to satisfy a condition that standard deviations of content ratios (% by mass) of all metal elements contained in the porous composite metal oxide at 0.1% by mass or more are each 10 or less, the standard deviations being obtained by measuring content ratios of the metal elements at 100 measurement points within a minute analysis region of 20 nm square by energy dispersive X-ray spectroscopy using a scanning transmission electron microscope equipped with a spherical aberration correction function.

Porous composite metal oxide, catalyst using the same, and methods for producing the porous composite metal oxide and the catalyst

A catalyst support for purification of exhaust gas includes a porous composite metal oxide, the porous composite metal oxide containing alumina, ceria, and zirconia and having an alumina content ratio of from 5 to 80% by mass, wherein after calcination in the air at 1100&#xb0; C. for 5 hours, the porous composite metal oxide satisfies a condition such that standard deviations of content ratios (as at % unit) of aluminum, cerium and zirconium elements are each 19 or less with respect to 100 minute areas (with one minute area being 300 nm in length&#xd7;330 nm in width) of the porous composite metal oxide, the standard deviation being determined by energy dispersive X-ray spectroscopy using a scanning transmission electron microscope equipped with a spherical aberration corrector.

Catalyst support for purification of exhaust gas, catalyst for purification of exhaust gas using the same, and method for producing the catalyst support for purification of exhaust gas

A ceria-zirconia base composite oxide contains a composite oxide of ceria and zirconia. In the ceria-zirconia base composite oxide, a content ratio between cerium and zirconium in the composite oxide is in a range from 43:57 to 48:52 in terms of molar ratio ([cerium]:[zirconium]). An intensity ratio of a diffraction line at 2&#x3b8;=14.5&#xb0; to a diffraction line at 2&#x3b8;=29&#xb0; {I(14/29) value} and an intensity ratio of a diffraction line at 2&#x3b8;=28.5&#xb0; to the diffraction line at 2&#x3b8;=29&#xb0; {I(28/29) value}, which are calculated from an X-ray diffraction pattern obtained by an X-ray diffraction measurement using CuKa after heating under a temperature condition of 1100&#xb0; C. in air for 5 hours, respectively satisfy the following conditions: I(14/29) value&#x2267;0.015, and I(28/29) value&#x2266;0.08.

Ceria-zirconia base composite oxide, method for producing the same, and catalyst for purification of exhaust gas using the ceria-zirconia base composite oxide

A method of synthesizing metal composite oxide, the method including: a step of separately introducing into a high-speed stirring apparatus a ceria composite oxide microparticle colloid having a mean particle diameter of 10 nm or less after adding a dispersant and an alumina microparticle colloid having a mean particle diameter of 10 nm or less after adding a dispersant; a step of synthesizing alumina-ceria composite oxide microparticles by allowing the ceria composite oxide microparticles and the alumina microparticles that have been introduced into the high-speed stirring apparatus to react in a microscopic space; and a step of applying a shearing force of 17000 secor more to the alumina-ceria composite oxide microparticles.

Method of synthesizing metal composite oxide and metal composite oxide obtained by same

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Nagakute, Japan

Akihiko Suda