Santoku Corporation

Hokkaido University

National Institute of Advanced Industrial Science and Technology

Cataler Corporation

Tadatoshi Murota

Tatsuya Takeguchi

Motofumi Matsuda

Masatoshi Kusatsu

Shigeru Ono

Shinya Matsuo

Tomonori Tahara

Satoshi Matsueda

Keiichi Narita

Tsuyoshi Ota

Yoshikatsu Seino

Mikiya Tanaka

Hirokazu Narita

Nobuaki Ohguri

Wataru Ueda

Kyosuke Murakami

Hiroshi Takano

Masakatsu Kimura

Michio Tanaka

Hiroyuki Usui

Takeshi Ogata

Hiroki Sakaguchi

Provided is a method for easily and inexpensively separating a rare earth element contained in an aqueous solution.

Method for separating rare earth element

A Pd-supporting Zr-based composite oxide wherein by having a Zr-containing composite oxide support and Pd supported thereon and by showing, upon XAFS (X-ray absorption fine structure) analysis, a maximum peak in a Pd bond distance range of 2.500-3.500 &#x212b;, the maximum peak being located in a position of 3.050-3.110 &#x212b;.

Pd-supporting Zr-based composite oxide

Provided are a composite oxide which is suitable as a co-catalyst for an exhaust gas purifying catalyst or the like, has high heat resistance, and has an excellent oxygen absorbing and desorbing capability at low temperatures and a method for producing the composite oxide. The composite oxide contains Ce and Zr, wherein the Ce content is 30 to 80 at % and the Zr content is 20 to 70 at %, based on the total of Ce and Zr being 100 at %, or further contains particular element M, wherein the Ce content is not less than 30 at % and less than 80 at %, the Zr content is not less than 20 at % and less than 70 at %, and the content of element M is more than 0 at % and not more than 15 at %, based on the total of Ce, Zr, and element M being 100 at %.

Composite oxide

A catalyst, a hydrocarbon steam reforming catalyst, and a method for producing the same are provided. A catalytic metal containing at least Ni is supported on a composite oxide containing R, Zr, and oxygen, at a composition of not less than 10 mol % and not more than 90 mol % of R, not less than 10 mol % and not more than 90 mol % of Zr, and not less than 0 mol % and not more than 20 mol % of M (M: elements other than oxygen, R, and Zr), with respect to the total of the elements other than oxygen being 100 mol %, wherein the composite oxide has a specific surface area of 11 to 90 m/g, and the largest peak in the wavelength range of 200 to 800 cmof Raman spectrum with a full width at half maximum of 20 to 72 cm.

Catalyst and process for producing same

Provided are an anode active material for lithium ion rechargeable batteries and an anode, which are capable, when used in a lithium ion rechargeable battery, of providing excellent charge/discharge capacity and cycle characteristics, and also high rate performance, as well as a lithium ion rechargeable battery using the same. The anode active material contains particles having a crystal phase represented by RAx, wherein R is at least one element selected from the group consisting of rare earth elements including Sc and Y but excluding La, A is Si and/or Ge, and x satisfies 1.0&#x2264;x&#x2264;2.0, and a crystal phase consisting of A. The material is thus useful as an anode material for lithium ion rechargeable batteries.

Negative electrode for lithium-ion secondary battery

Provided are a method for producing a composite oxide and the composite oxide, which finds use as an easy-to-handle catalyst material having a high reforming rate of hydrocarbon to hydrogen even when oxidized. The method includes the steps of: (a) preparing a Ce aqueous solution not less than 80 mol % of which Ce ions are tetravalent, and a Zr aqueous solution containing Zr ions; (b1) mixing the Zr aqueous solution and a portion of the Ce aqueous solution to prepare a mixed aqueous solution (X1); (c1) hydrothermally processing solution (X1); (b2) adding the remainder of the Ce aqueous solution prepared in step (a) to a colloidal solution (Y1) of a composite salt obtained from step (c1) to prepare a colloidal solution (Y2) of a composite salt; (c2) hydrothermally processing solution (Y2) obtained from step (b2); (d) mixing a colloidal solution (Y3) of a composite salt obtained from step (c2) with an alkaline solution and a surfactant to prepare a precipitate; and (e) calcining the precipitate.

Method for producing composite oxide and composite oxide catalyst

A positive electrode catalyst, for use in a positive electrode in a device provided with the positive electrode and a negative electrode, in which a reaction represented by 4OH&#x2192;O+2HO+4eis performed on a side of the positive electrode. The positive electrode catalyst includes a layered metal oxide, wherein the layered metal oxide is a Ruddlesden-Popper type layered perovskite represented by (LaA) (FeB)(SrC)Owherein, A is a rare earth element other than La, B is a transition metal other than Fe, and C is an alkaline earth metal other than Sr; and x satisfies an expression: 0&#x2266;x&#x3c;1, y satisfies an expression: 0&#x2266;y&#x3c;1, z satisfies an expression: 0&#x2266;z&#x3c;1, and a satisfies an expression: 0&#x2266;a&#x2266;3.

Positive electrode catalyst and device

Provided is solid electrolyte utilizing a composite oxide of a RP-type structure, that is useful for achieving strong electromotive force and enhanced current-voltage characteristics of a fuel battery, has enhanced ion conductivity and sufficiently inhibited electronic conductivity, and is capable of intercalation of a large amount of water or hydrogen groups, as well as a solid electrolyte membrane, a fuel battery cell, and a fuel battery. The solid electrolyte and the solid electrolyte membrane of the present invention has been obtained by subjecting a particular composite oxide of a RP-type structure or a membrane thereof to a treatment of at least one of hydroxylation and hydration, and has a property that the mass determined by TG measurement at 400&#xb0; C. is less than that at 250&#xb0; C. by not less than 4.0%.

Solid electrolyte, solid electrolyte membrane, fuel battery cell, and fuel battery

All-solid-state lithium ion battery and positive electrode mixture

Provided are a solid electrolyte membrane useful in achieving strong electromotive force in a fuel battery, and a fuel battery cell produced with this membrane. The solid electrolyte membrane includes a substrate made of a sheet material and having a plurality of openings penetrating the substrate in its thickness direction, and a solid electrolyte layer provided on at least one of the faces of the substrate. The fuel battery cell includes a solid electrolyte membrane having the solid electrolyte layer on one of the faces of the substrate, and a catalyst layer containing a precious metal and provided on the other of the faces of the substrate, with the solid electrolyte layer and the catalyst layer being in contact with each other in the openings of the substrate.

Solid electrolyte membrane, fuel battery cell, and fuel battery

A composite oxide is provided which has large oxygen absorption and desorption over a wide temperature range, in particular in a higher temperature range of not lower than 700&#xb0; C. and/or in a lower temperature range of not higher than 400&#xb0; C. The composite oxide contains oxygen, R composed of at least one of Ce and Pr, and Zr at a particular ratio, and optionally a particular ratio of M composed of at least one element selected from alkaline earth metals and the like.

Growing community of inventors

Kobe, Japan

Tadatoshi Murota