Shinshu University

Permelec Electrode Ltd.

Ishifuku Metal Industry Co., Ltd.

Other

De Nora Permelec Ltd

Wataru Sugimoto

Yoshio Takasu

Yasushi Murakami

Dai Mochizuki

Yusuke Ayato

Tomohiro Ohnishi

Daisuke Takimoto

Yoshinori Nishiki

Masaharu Uno

Tsuneto Furuta

Wataru Shimizu

Yuji Yamada

Shigeyuki Sugimoto

Sho Makino

Tatsuya Ohashi

Junfeng Zhang

An electrocatalyst including carbon and a nanosheet supported on the carbon. The nanosheet includes a metal ruthenium nanosheet, and a platinum atomic layer formed on an entire surface of the metal ruthenium nanosheet. The metal ruthenium nanosheet is a monoatomic layer, and the platinum atomic layer is a monoatomic layer or a monoatomic layer laminated body.

Electrocatalyst

A core-shell structure nanosheet includes a metal ruthenium nanosheet, and a platinum atomic layer provided on a surface of the metal ruthenium nanosheet. An electrocatalyst includes carbon, and the core shell structure nanosheet supported on the carbon. A method for manufacturing an electrocatalyst includes applying a ruthenium oxide nanosheet colloid which comprises a ruthenium oxide nanosheet, on carbon to obtain a carbon-supported ruthenium oxide nanosheet, in which the ruthenium oxide nanosheet is supported on the carbon. The carbon-supported ruthenium oxide nanosheet is reduced to obtain a carbon-supported ruthenium metal nanosheet, in which a ruthenium metal nanosheet is supported on the carbon. A platinum atomic layer is provided on a surface of the metal ruthenium nanosheet to obtain the electrocatalyst.

Core-shell structure type nanosheet

A lithium composite negative electrode which allows a hybrid capacitor to operate at room temperature by reducing interfacial resistance in the electrode, a hybrid capacitor comprising the composite negative electrode, and manufacturing methods thereof. The lithium composite negative electrode is a laminar electrode including a lithium ion conductive solid electrolyte, an alginate gel electrolyte, and lithium-doped carbon. Further, a hybrid capacitor includes a positive electrode including a carbon material and/or a metal oxide, the lithium composite negative electrode, and a neutral aqueous electrolyte filled between the positive electrode and the lithium composite negative electrode. The lithium composite negative electrode is configured as a laminar electrode including the lithium ion conductive solid electrolyte, the alginate gel electrolyte, and the lithium-doped carbon.

Lithium composite negative electrode and hybrid capacitor, and manufacturing methods thereof

Provided is a layered alkali iridate and a layered iridic acid to be used for producing iridium oxide nanosheets, and an iridium oxide nanosheet. A layered alkali iridate with composition of MIrO.nHO (where M is a monovalent metal, x is 0.1 to 0.5, y is 1.5 to 2.5, and n is 0.5 to 1.5), wherein MIrO.nHO has a layered structure. The M is potassium, and the layered alkali iridate has diffraction peaks at 2&#x3b8; diffraction angles of 13.0&#xb0; and 26.0&#xb0;. A layered iridic acid with a composition of HIrO.nHO (where x is 0.1 to 0.5, y is 1.5 to 2.5, and n is 0 to 1), wherein HIrO.nHO has a layered structure. This layered iridic acid has diffraction peaks at 2&#x3b8; diffraction angles of 12.3&#xb0; and 24.6&#xb0;. A single crystalline iridium oxide nanosheet having a thickness of 3 nm or less.

Layered alkali iridate, layered iridic acid, and iridium oxide nanosheet

The present invention provides a process for producing an electrode for electrochemical reaction, wherein a conductive diamond layer is formed on an electrode substrate in the electrode; and the electrode substrate on which the conductive diamond layer is formed is kept at a temperature of 400&#xb0; C. or more and 1,000&#xb0; C. or less in a water vapor, thereby forming a micropore in the conductive diamond layer. Also, the present invention provides an electrode for electrochemical reaction obtained by the foregoing production process.

Electrode for electrochemical reaction and production process thereof

The present invention provides an electrode catalyst for electrochemical reaction, the electrode catalyst having: a conductive diamond particle having fine pores on a surface thereof; and a carbon-reactive catalyst metal in the fine pores, a process for producing the electrode catalyst, and an electrode.

Electrode catalyst for electrochemical reaction, process for producing the electrode catalyst and electrode for electrochemical reaction having the electrode catalyst

A layered ruthenic acid compound is converted to a protonic layered ruthenic acid hydrate, which is then converted to a layered alkylammonium-ruthenic acid intercalation compound to obtain a colloid containing ruthenic acid nanosheets having a thickness of 1 nm or smaller. Thereby, a ruthenic acid nanosheet is obtained.

Ruthenic acid nanosheet and production method thereof

Growing community of inventors

Ueda, Japan

Wataru Sugimoto