Denso Corporation

Other

Nippon Soken, Inc.

Kyoto University

Koichi Niihara

Tadachika Nakayama

Miho Ito

Jun Hasegawa

Kazuhiko Koike

Tomomi Hase

Tomohiko Nakanishi

Masakazu Tanaka

Tosiharu Kondo

Takashi Kondo

Takumi Suzawa

Naohiro Kubota

Hiromi Sano

Susumu Kitagawa

Kyohei Usami

Yasushi Hayashi

Satoshi Horike

Shinya Mashimo

Tomoya Itakura

Munehiro Inukai

Daiki Umeyama

A proton conductor includes a metal ion, an oxoanion, and a molecule capable of undergoing protonation or deprotonation, in which at least one of the oxoanion and the molecule capable of undergoing protonation or deprotonation coordinates to the metal ion to form a coordination polymer. The oxoanion is preferably a monomer. The oxoanion is exemplified by at least one selected from the group consisting of phosphate ion, hydrogenphosphate ion, and dihydrogenphosphate ion. The molecule capable of undergoing protonation or deprotonation is exemplified by at least one selected from the group consisting of imidazole, triazole, benzimidazole, benzotriazole, and derivatives thereof.

Proton conductor, method for manufacturing proton conductor, and fuel cell

Particles for catalyst which have a function of absorbing and desorbing oxygen, the particles comprising an iron compound in which an element, other than Fe, having two valences is solid-soluted in an oxide of Fe having three valences, and a method for producing the particles for catalyst which comprises precipitating a precipitate containing Fe having three valences and an element, other than Fe, having two valences from a solution containing ions of Fe having three valences and ions of the element, other than Fe, having two valences, and drying and firing the precipitate to produce the particles.

Particles for catalyst and method for producing same

A ceramic body that can support a required amount of catalyst component, without lowering the characteristics such as strength, manufactured without forming a coating layer and providing a high performance ceramic catalyst body that is excellent in practical utility and durability. This ceramic body is made by substituting at least one of the constituent elements of cordierite that constitutes the substrate ceramic, for example Al, with W that is the element having an empty orbit in d or f orbit, has high bonding strength and is less susceptible to deterioration since the catalyst component Pt is supported by means of chemical bonding.

Ceramic body and ceramic catalyst body

A catalyst assembly comprising a substrate, nanofilaments which have a nanometer-size diameter and are formed on the substrate, and particles which have a nanometer-size diameter, at least one of the nanofilaments and the particles having a catalytic function, is provided to use a catalyst more efficiently and to provide a catalytic function more efficiently. Interstices between the nanofilaments serve as distribution channels of a reactive gas, and the reactive gas spreads sufficiently not only around the ends of nanofilaments but also inside a catalyst assembly. A combination of nanofilaments and particles enables dispersion of a catalyst at a distance of not more than about 100 nanometers.

Catalyst assembly

This invention aims at providing a catalyst body exhibiting a lower degradation of a catalyst due to thermal durability and capable of keeping higher catalyst performance for a long time. A catalyst component such as Pt is directly supported by Zr, W, etc, replacing elements inside a support such as Al of cordierite to provide a catalyst body without forming a coating layer. A combination of the catalyst component and the element inside the support is selected so that support strength is greater than 5 eV by simulation using a density functional method. Coarsening of catalyst particles can be suppressed and a high-performance catalyst body excellent in thermal durability can be obtained.

Catalyst body

(i) In a ceramic catalyst body which comprises a ceramic carrier which has a multitude of pores capable of supporting a catalyst directly on the surface of a substrate ceramic and a catalyst supported on the ceramic carrier, a layer containing an anti-evaporation metal such as Rh is formed on the outer surface of catalyst metal particles such as Pt or Rh. The layer containing the anti-evaporation metal protects the catalyst metal and prevents evaporation thereof, thereby suppressing the deterioration; and/or (ii) A ceramic catalyst body is made by having a main catalyst component and a promoter component directly on a ceramic carrier which can directly support the catalyst by substituting a part of the constituent elements of cordierite, and a trap layer is provided in the upstream thereof for trapping sulfur which is a catalyst poisoning component included in the exhaust gas. Since sulfur included in the exhaust gas can be collected by the trap layer, the catalyst poisoning component can be removed from the gas which enters the catalyst, thus preventing catalyst poisoning.

Ceramic catalyst body

This invention aims at achieving early activation by use of a catalytic body having a low thermal capacity, and a low pressure loss, without using a coating layer to reduce exhaust emission. The invention is directed also to improve exhaust purification performance by improving the combination of catalytic bodies and performance of each catalytic body. In the invention, a start catalystis arranged at an upstream portion of an exhaust pipe P of a car engine E and a three way catalystis disposed on the downstream side. The start catalystcan directly support catalytic components through chemical bonds by incorporating replacing elements into a substrate ceramic having high heat resistance such as cordierite. Because a coating layer is not necessary, the catalyst of the invention has a low heat capacity and a large open area and achieves reduction of exhaust emission, and reduction of a pressure loss, through early activation.

Catalyst for automobiles

Catalyst particles and method of manufacturing the same

A flame-retardant electrolytic solution of an electrolyte salt in an organic solvent, wherein the organic solvent contains at least one phosphorus compound represented by formula (I) and a nonaqueous secondary battery containing the flame-retardant electrolytic solution.

Flame-retardant electrolytic solution and nonaqueous secondary battery containing the same

Growing community of inventors

Aichi-pref., Japan

Miho Ito