Mitsui Minings & Melting Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Hiromu Watanabe

Naohiko Abe

Susumu Takahashi

Yoshihiro Yoneda

Tsukasa Takahashi

Hiroki Takahashi

Koji Taniguchi

Ryoma Tsukuda

Tatsuya Arai

Kazuhiko Kato

Koichi Miyake

Yuichi Senoo

Akiko Sugimoto

Atsushi Fukuda

Shoichi Akiyama

Akiko Sugioka

Daisuke Sakamoto

Satoshi Mogi

Kenichi Amitani

Shunichi Hatamoto

Dai Okumura

Motoyuki Tanaka

A cooling fan device includes an electronic control unit that controls an engagement rate of a fan clutch. The electronic control unit executes a first calculation process that calculates an air conditioner requested engagement rate, a second calculation process that calculates, as a first guard value, a value of an engagement rate at which a fan rotation speed increases at a specified speed and an upper limit guarding process that sets a value of the air conditioner requested engagement rate to the first guard value when a calculated value of the air conditioner requested engagement rate in the first calculation process exceeds the first guard value. The electronic control unit further controls the engagement rate of the fan clutch based on a value of the air conditioner requested engagement rate after execution of the upper limit guarding process.

Cooling fan device

An electrode catalyst layer for fuel cells capable of effectively preventing reduction of cell voltage in a high current density region. The electrode catalyst layer contains a catalyst-on-support composed of a support made of a conductive inorganic oxide having a catalyst supported thereon and a hydrophilic material. The hydrophilic material is an agglomerate including hydrophilic conductive particles. The content of the hydrophilic material in the catalyst layer is 2 mass % or higher and lower than 20 mass % relative to the sum of the support and the hydrophilic material. The ratio of the particle size d1 of the hydrophilic particles to the particle size D of the catalyst-on-support is 0.5 to 3.0. The ratio of the particle size d2 of the hydrophilic material to the thickness T of the catalyst layer is 0.1 to 1.2.

Electrode catalyst layer for fuel cells and solid polymer fuel cell using same

Provided is a method with which it is possible to easily produce an electrode catalyst having excellent catalytic performance such as kinetically controlled current density. The method involves: a dispersion liquid preparation step of preparing a dispersion liquid by mixing (i) at least one type of solvent selected from the group consisting of sulfoxide compounds and amide compounds, (ii) a catalyst carrier powder constituted by a metal oxide, (iii) a platinum compound, (iv) a transition metal compound, and (v) an aromatic compound including a carboxyl group; and a loading step of heating the dispersion liquid to thereby load a platinum alloy of platinum and a transition metal on a surface of the catalyst carrier powder.

Method for producing electrode catalyst, and electrode catalyst

This method for producing an electrode catalyst includes: a dispersion liquid preparation step wherein a dispersion liquid is prepared by mixing (i) at least one solvent selected from the group consisting of sulfoxide compounds and amide compounds, (ii) a catalyst carrier powder composed of a metal oxide, (iii) a platinum compound, (iv) a transition metal compound and (v) an aromatic compound that contains a carboxyl group; a loading step wherein the dispersion liquid is heated so that a platinum alloy of platinum and a transition metal is loaded on the surface of the catalyst carrier powder; a solid-liquid separation step wherein a dispersoid is separated from the dispersion liquid after the loading step, thereby obtaining a catalyst powder wherein the catalyst carrier powder is loaded with the platinum alloy; and a heat treatment step wherein the catalyst powder is heated under vacuum or in a reducing gas atmosphere.

In this fuel cell electrode catalyst layer, a catalyst is supported on a carrier comprising inorganic oxide particles. The fuel cell electrode catalyst layer is provided with a porous structure. When a mercury penetration method is used to measure the pore size distribution of the porous structure, a peak is observed in the range spanning from 0.005 &#x3bc;m to 0.1 &#x3bc;m inclusive, and a peak is also observed in the range spanning from over 0.1 &#x3bc;m to not more than 1 &#x3bc;m. When P1 represents the peak intensity in the range spanning from 0.005 &#x3bc;m to 0.1 &#x3bc;m inclusive, and P2 represents the peak intensity in the range spanning from over 0.1 &#x3bc;m to not more than 1 &#x3bc;m, the value of P2/P1 is 0.2-10 inclusive. It is preferable that the inorganic oxide be tin oxide.

Fuel cell electrode catalyst layer, production method therefor, membrane electrode assembly, and solid polymer fuel cell

Provided is a phosphor for scintillator that can absorb radiation and convert it into visible light, and which has a short fluorescence decay time. The phosphor contains a lutetium sulfide-containing host material and an activator agent ion, for example, a phosphor comprising a composition represented by the general formula (LuPr)S, or (LuCe)S.

Phosphor for scintillator

Growing community of inventors

Saitama, Japan

Hiromu Watanabe