Toyota Jidosha Kabushiki Kaisha

Cataler Corporation

Nippon Soken, Inc.

Toyota Motor Engineering & Manufacturing North America, Inc.

Kabushiki Kaisha Toyota Chuo Kenkyusho

Toyota Motor Corporation

Cataler Industrial Co., Ltd.

Sandia Corporation, Operator of Sandia National Laboratories

Toyota Chuo Kenkyusho Kabushiki Kaisha

Tetsuo Nagami

Hiromitsu Tanaka

Masakatsu Sanada

Hiroshi Hirayama

Mikihiro Kataoka

Masahiko Ogai

Toshihiko Igashira

Takaaki Itou

Kazuhiro Sakurai

Kouji Yoshizaki

Tohru Yoshinaga

Kiyohiko Watanabe

Hisao Kato

Toshihiro Takada

Yasuyuki Kawabe

Yukihiro Shinohara

Tomoaki Terada

Akihiro Izawa

Sozaburo Ohashi

Osamu Fujishiro

Tomohiro Ishida

Hiroaki Ichikawa

Kouji Banno

Takashi Ohta

Yoshiaki Fukushima

Noritaka Miyamoto

Tetsuya Shoji

John Muldoon

James E Miller

Ken Tanaka

Akane Okada

Shinji Inagaki

John A Shelnutt

Yukiyoshi Ueno

Wen Li

Haruo Doi

Masahiro Sugiura

Kenichi Harada

Craig J Medforth

Koichi Kasahara

Yujiang Song

Hiroaki Takahashi

Yasuo Takada

Kazuyuki Kuroda

Kazunobu Ishibashi

Takahiko Asaoka

Yosuke Horiuchi

Yuji Sakakibara

Yoshitsugu Ogura

Kazuhiro Fukumoto

Tetsuo Kawamura

Michael A Hickner

Takahiro Nagata

Akihiro Hori

Shigeji Matsumoto

Toru Yamamoto

Yoichi Hosokawa

Mikihiro Hori

Yuichiro Sugiyama

Shigeru Kido

Shinji Matsuura

Masaharu Tsuji

Kazutaka Hiroshima

Naoko Iwata

Yutaka Ohya

Makoto Yuasa

Yoko Kumai

Miyuki Koujiya

Joji Miyake

Kenichi Hirada

Kiyotaka Hayashi

Tooru Yamamoto

Junichiro Hayashi

Norihiko Aono

Takashi Iomoda

Hidetoshi Ohsawa

Yukimura Yamada

Keiko Uto

Hidetaka Nishikoori

Hideoki Fukushima

Tatsuo Noritake

Tetsuo Ito

Kenichi Oyaizu

Aritomo Yamaguchi

Hiroshi Ikkanda

Yuichi Iai

Masakuni Yamamoto

A fuel cell electrode catalyst includes: a noble-metal-supported catalyst including a carbon support and a noble metal supported on the carbon support; and a water-repellent material with which the noble-metal-supported catalyst is modified. The carbon support is mesoporous carbon in which a pore volume of pores having a pore size of 2 nm to 5 nm is 2.1 ml/g to 2.4 ml/g. An amount of the water-repellent material is 3% by weight to 7% by weight with respect to a total weight of the mesoporous carbon and the water-repellent material.

Fuel cell electrode catalyst

An electrode catalyst for a fuel cell including: a carbon support; and catalytic metal supported on the carbon support, the catalytic metal being selected from platinum or a platinum alloy, in which the carbon support has a crystallite size of (002) plane of carbon within a range of 5.0 nm or more and has a specific surface area within a range of 95 m/g to 170 m/g, and the catalytic metal has a crystallite size of (220) plane of platinum within a range of 4.5 nm or less.

Electrode catalyst for fuel cell and method of producing the same, and cathode, anode, and fuel cell including electrode catalyst

Provided is an electrode catalyst for a fuel cell including: a carbon support; and catalytic metal supported on the carbon support, the catalytic metal being selected from platinum or a platinum alloy, in which the carbon support has a crystallite size of (002) plane of carbon within a range of 5.0 nm or more and has a specific surface area within a range of 95 m/g to 170 m/g, and the catalytic metal has a crystallite size of (220) plane of platinum within a range of 4.5 nm or less.

A method for producing an electrode catalyst for a fuel cell is provided. The electrode catalyst includes a carbon support and a catalyst supported on the carbon support. The catalyst is one of platinum and a platinum-alloy. The method includes supporting the catalyst on the carbon support; and treating the carbon support carrying the catalyst with a nitric acid and cleaning the treated carbon support, such that an amount of an acid present on the carbon support becomes in a range from 0.7 mmol to 1.31 mmol of the acid per gram of the electrode catalyst.

Electrode catalyst for fuel cell, method for producing the same, and polymer electrolyte fuel cell using the same

A production method of a fuel cell electrode catalyst includes: a supporting step of causing platinum and yttrium to be supported on a carrier using a nonaqueous solvent; and an acid treatment step of performing an acid treatment on the carrier on which platinum and yttrium are supported.

Fuel cell electrode catalyst, production method thereof, and fuel cell

The invention relates to methods of preparing metal particles on a support material, including platinum-containing nanoparticles on a carbon support. Such materials can be used as electrocatalysts, for example as improved electrocatalysts in polymer electrolyte membrane fuel cells (PEM-FCs).

Photocatalytic methods for preparation of electrocatalyst materials

The present invention specifies the physical property valves of a catalytic layer correlating with the performance of a fuel cell, and provides the catalytic layer having the physical proper values and a fuel cell. Specifically, in a fuel cell having a membrane-electrode assembly provided with a catalytic layeron each side of an electrolyte membrane, an electrode powder constituting the catalytic layershall have an amount of adsorbed water vapor in a range of 52 to 70 cm(STP)/g by a value measured when the water-vapor partial pressure is 0.6, which is determined from the adsorption isotherm of water. The fuel cell having the catalytic layer with the use of the electrode powder having the amount of adsorbed water vapor in this range has the output performance of 0.6 A/cmor higher by current density at 0.6 V, in a less humidified condition and a more humidified condition.

Fuel cell and electrode powder constituting the catalytic layer thereof

An electrode catalyst for a fuel cell, which has improved performance compared with conventional platinum alloy catalysts, a method for producing the electrode catalyst, and a polymer electrolyte fuel cell using the electrode catalyst are provided. The electrode catalyst for a fuel cell comprises a noble-metal-non-precious metal alloy that has a core-shell structure supported on a conductive carrier. The composition of the catalyst components of the shell is such that the amount of the noble metal is greater than or equal to the amount of the non-precious metal.

Electrode catalyst for fuel cell, method for producing the electrode catalyst, and polymer electrolyte fuel cell using the electrode catalyst

This invention provides a catalyst material comprising a conductive material coated with a polynuclear complex molecule derived from at least two types of heteromonocyclic compounds and a catalyst metal coordinated to the coating layer of the polynuclear complex molecule, and a catalyst material comprising a conductive material coated with a polynuclear complex molecule derived from a heteromonocyclic compound and a catalyst metal, which is a composite of a noble metal and a transition metal, coordinated to the coating layer of the polynuclear complex molecule. Such catalyst material of the invention has excellent catalytic performance and serviceability as, for example, an electrode of fuel cells.

Catalyst material and process for preparing the same

It is an object of the present invention to provide a cathode catalyst for fuel cells containing platinum and iron which can maintain the durability of a battery and can make a battery high output. The cathode catalyst for fuel cells comprises a supporting layer which consists of an alloy containing platinum and iron and further containing the third component which has an affinity for iron including one or more sorts of elements selected from the group consisting of tungsten, titanium, molybdenum, rhenium, zinc, manganese, tin, tantalum and rhodium, and a support on which the supporting layer is loaded. A catalyst using an alloy containing platinum and iron enables the batteries to become high output. By alloying one or more sorts of elements of the third component which has an affinity for iron with an alloy containing platinum and iron, it is possible to prevent eluting of the iron into the electrolyte.

Cathode catalyst for fuel cell

An electrode catalyst for a fuel cell includes a conductive support, and catalytic particles loaded on the conductive support. The catalytic particles include platinum and a base metal being on the lower end of the electrochemical series with respect to platinum. The number of the atoms of the base metal, forming metallic oxides without alloying with the platinum, is less than 5 atomic % of the number of the atoms of the platinum on a surface of the catalytic particles. The electrode catalyst is produced by loading the platinum and base metal on the conductive support, alloying the platinum and base metal thereon by a heat treatment, thereby making the catalytic particles, and removing metallic oxides from a surface of the catalytic particles. The electrode catalyst is less expensive comparatively, exhibits high catalytic activities, and hardly lowers the battery performance of fuel cells.

Electrode catalyst for fuel cell and process for producing the same

A catalyst for purifying exhaust gases comprises a catalyst carrier made of potassium titanate and a noble metal loaded on the catalyst carrier. The catalyst carrier is substantially free from alumina. This catalyst can oxidize at least hydrocarbons in exhaust gases at a high catalytic activity even at low temperatures, and at the same time can suppress SO.sub.2 from converting into sulfates. This catalyst does not employ substance like alumina exhibiting solid acidity as a catalyst carrier. Further, this catalyst can be used for purifying exhaust gases from diesel engines to suppress particulates and sulfates from being emitted, and to improve conversions of hydrocarbons and carbon monoxide.

Catalyst for purifying exhaust gases

An electrically heating catalytic apparatus that quickly heats catalyst to an activation temperature even when the engine is started at a low temperature below the catalyst activation temperature. The apparatus employs an electrically conductive catalyst carrier that is electrically heated. The carrier is provided with local hot spots to be energized. Since the heat is locally generated, the heat capacity of the catalyst carrier is small to shorten a temperature increasing time.

Electrically heated catalytic apparatus

An electrically heated catalytic converter having a scroll-like cylindrical laminated assembly in which belts of thin corrugated metal sheet and a thin plain metal sheet are laminated and wound around a center electrode, and the outermost layers are connected to an outer electrode. The corrugated metal sheet has an insulating coating made of a metal oxide, and the plain metal sheet has no insulating coatings. Conductive connections in which the corrugated metal sheet and the plain metal sheet are electrically connected to each other through the insulating coating of the corrugated metal sheet are made at predetermined positions in the layers of the laminated assembly and electric paths of desired shapes are formed by these conductive connections. The corrugated metal sheet and the plain metal sheet are connected in the areas around the respective conductive connections in such a manner that the metal sheets are isolated from each other. Thus, the cross sectional area of the respective conductive connections can be reduced without reducing the total connection area between the metal sheets. Since the cross sectional area of the respective connections can be reduced, the intensity of the electric current is increased in the conductive connections. Therefore, the conductive connections are heated rapidly by electric current and reach the activating temperature of the catalyst carried by the metal sheets.

Electrically heated catalytic converter for an engine

Growing community of inventors

Nagoya, Japan

Tetsuo Nagami