Yokohama National University

De Nora Permelec Ltd

Kawasaki Jukogyo Kabushiki Kaisha

Japan Science and Technology Agency

Sumitomo Electric Industries, Limited

Kyoto University

National University Corporation Yokohama National University

Asahi Kasei Kabushiki Kaisha

Shigenori Mitsushima

Yoshinori Nishiki

Akihiro Kato

Awaludin Zaenal

Yoshiyuki Kuroda

Akiyoshi Manabe

Yasutomo Takakuwa

Kenichiro Ota

Akimitsu Ishihara

Ikuo Nagashima

Kensaku Nagasawa

Yasushi Sato

Takaaki Nakai

Nobuyuki Kamiya

Tatsuya Taniguchi

Masatoshi Majima

Takashi Miyazaki

Kazuki Okuno

Takahiro Higashino

Michikazu Hara

Hiromasa Tawarayama

Masashi Matsumoto

Setsuro Ogata

Toshiyuki Hirano

Shinji Oshima

Koji Matsuoka

Hideto Imai

Kota Miyoshi

Akihiko Inomata

Yoshiharu Uchimoto

Kojiro Nakagawa

Fumiya Tsujii

Norikazu Fujimoto

Ayaka Nagai

Tomoki Uchiyama

Liu Yan

Yun Bao

Shohei Takatsu

Ashraf Abdelhaleem

Kazunari Doumen

Takeshi Nishimoto

Sho Fujita

Makoto Hamazaki

Ken-ichiro Ota

Haruki Masumura

Koichi Matsuzawa

Keisuke Ukita

Akimitsu Isihara

Jiajin Bi

Ken-Ichiro Ota

The present invention provides an accelerated evaluation method for an anode, the method imitating electric power having a large output fluctuation, such as renewable energy, and enabling an accurate evaluation, in a shorter time, of durability of an anode using such electric power having a large output fluctuation as a power source. The method is an accelerated evaluation method for an anode, the method performing evaluation of the durability of the anode in an accelerated manner by electrochemical operation in an aqueous electrolyte. The method includes a Jstep of loading an oxidation current of 0.1 A/cmor more to the anode for a duration of Tand an Estep of holding the anode at a constant potential lower than an open circuit potential for a duration of T, wherein each of the Jstep and the Estep is repeated 100 times or more.

Accelerated evaluation method for anode

The present invention provides an alkaline water electrolysis anode such that even when electric power having a large output fluctuation, such as renewable energy, is used as a power source, the electrolysis performance is unlikely to be deteriorated and excellent catalytic activity is retained stably over a long period of time. The alkaline water electrolysis anode is an alkaline water electrolysis anodeprovided with an electrically conductive substrateat least a surface of which contains nickel or a nickel base alloy and a catalyst layerdisposed on the surface of the electrically conductive substrate, the catalyst layercontaining a nickel-containing metal oxide having a spinel structure, wherein the nickel-containing metal oxide contains nickel (Ni) and manganese (Mn), and has an atom ratio of Li/Ni/Mn/O of (0.0 to 0.8)/(0.4 to 0.6)/(1.0 to 1.8)/4.0.

Anode for alkaline water electrolysis and method for producing same

The present invention provides an electrode for electrolysis in which electrolysis performance is hard to deteriorate and excellent catalytic activity is kept stable over a long period of time even when electric power in which there is a large fluctuation in output, such as renewable energy, is used as a power source. The electrode for electrolysis is an electrodefor electrolysis provided with an electrically conductive substrateat least the surface of which contains nickel or a nickel-based alloy, an intermediate layerformed on the surface of the electrically conductive substrateand containing a lithium-containing nickel oxide represented by composition formula LiNiO(0.02≤x≤0.5), and a catalyst layerof a nickel cobalt spinel oxide, an iridium oxide, or the like, the catalyst layerformed on the surface of the intermediate layer

Electrolysis electrode and method for manufacturing same

The present invention realizes industrially excellent effects such that when electric power having a large output fluctuation, such as renewable energy, is used as a power source, electrolysis performance is unlikely to be deteriorated and excellent catalytic activity is retained stably over a longer period of time, and in addition, the present invention provides a technique that enables forming a catalyst layer of an oxygen generation anode, which gives such excellent effects, with a more versatile materials and by a simple electrolysis method. Provided are an alkaline water electrolysis method including supplying an electrolyte obtained by dispersing a catalyst containing a hybrid nickel-iron hydroxide nanosheet (NiFe-ns) being a composite of a metal hydroxide and an organic substance to an anode chamber and a cathode chamber, and using the electrolyte for electrolysis in each chamber in common, an alkaline water electrolysis method including supplying an electrolyte obtained by dispersing a catalyst containing the NiFe-ns to an anode chamber and a cathode chamber, and performing electrolytic deposition of the NiFe-ns in the electrolytic cell during operation to electrolytically deposit the NiFe-ns on a surface of an electrically conductive substrate having a catalyst layer formed on a surface of an oxygen generation anode, thereby recovering and improving electrolysis performance, and an alkaline water electrolysis anode.

Alkaline water electrolysis method, and anode for alkaline water electrolysis

An organic hydride production apparatus includes: an electrolyte membrane having proton conductivity; a cathode that includes a cathode catalyst layer used to hydrogenate a hydrogenation target substance using protons to produce an organic hydride and also includes a cathode chamber; an anode that includes an anode catalyst layer used to oxidize water to produce protons and also includes an anode chamber; and a gas introduction unit that introduces, into the anolyte at a certain position, a certain gas used to remove at least one of the hydrogenation target substance and the organic hydride that have passed through the electrolyte membrane and been mixed into the anolyte.

Organic hydride production apparatus and method for producing organic hydride

A metal porous body having a three-dimensional network structure, includes: a framework forming the three-dimensional network structure; and a coating layer having fine pores and coating the framework, the three-dimensional network structure including a rib and a node connecting a plurality of ribs, the framework including an alkali-resistant first metal, the fine pores having an average fine pore diameter of 10 nm or more and 1 &#x3bc;m or less, the coating layer including an alkali-resistant second metal and optionally including an alkali-soluble metal, the alkali-soluble metal being contained at a proportion of 0% by mass or more and 30% by mass or less with reference to a total mass of the framework and the coating layer.

Metal porous body

An object of the present invention is to provide an electrolysis technique such that the electrolysis performance is unlikely to be deteriorated, and excellent catalytic activity is retained stably over a long period of time even when electric power having a large output fluctuation, such as renewable energy, is used a power source, and this object is realized by an alkaline water electrolysis method, in which an electrolytic solution obtained by dispersing a catalyst containing a hybrid cobalt hydroxide nanosheet (Co-NS) being a composite of a metal hydroxide and an organic substance is supplied to an anode chamber and a cathode chamber that form an electrolytic cell, and the electrolytic solution is used for electrolysis in each chamber in common, and an alkaline water electrolysis anode.

Alkaline water electrolysis method and alkaline water electrolysis anode

To provide an electrolysis cell for producing an organic chemical hydride capable of advancing a reduction reaction in a cathode of an organic compound having an unsaturated bond with high current efficiency and a small electric power consumption unit. An electrolysis cellfor producing an organic chemical hydride includes a solid polymer electrolyte filmwhich has proton conductivity; a cathodewhich is provided on one surface of the solid polymer electrolyte filmand generates a hydride by reducing a substance to be hydrogenated; a cathode chamberwhich accommodates the cathodeand to which the substance to be hydrogenated is supplied; an electrode catalyst-containing anodewhich is provided on another surface of the solid polymer electrolyte filmand generates a proton by oxidizing water; and an anode chamberwhich accommodates the anodeand to which an electrolytic solution is supplied, in which at least one of a surface of the cathodeside and a surface of the anodeside of the solid polymer electrolyte filmis hydrophilized.

Electrolytic cell for production of organic chemical hydrides

An organic hydride production apparatus that enables the reduction reaction at the cathode of an organic compound having an unsaturated bond to proceed at high current efficiency and at a low electric power consumption rate, and a method for producing an organic hydride that uses this production apparatus. The production apparatus includes a solid polymer electrolyte membrane having proton conductivity, a cathode which is provided on one surface of the solid polymer electrolyte membrane and generates a hydride by reducing a substance to be hydrogenated, a cathode chamber which houses the cathode and is supplied with the substance to be hydrogenated, an electrode catalyst-containing anode which is provided on the other surface of the solid polymer electrolyte membrane and generates protons by oxidizing water, and an anode chamber which houses the anode and is supplied with an electrolytic solution, wherein the substance to be hydrogenated is supplied from the lower end of the cathode chamber, the production apparatus has a hydride outlet through which the product and the like is discharged from the upper end of the cathode chamber, and at least one partition with a width of not less than 0.1 mm is formed inside the cathode camber.

Apparatus for producing organic hydride and method for producing organic hydride using same

An anode for oxygen evolution that operates at a small overpotential and in a stable manner, and can be used favorably in an organic chemical hydride electrolytic synthesis apparatus. An anodefor oxygen evolution that evolves oxygen in a sulfuric acid aqueous solution containing a substance to be hydrogenated dissolved at a concentration higher than 1 mg/L, wherein an anode substrateis composed of a valve metal, and an anode catalyst layercontaining at least one oxide, nitride or carbide of iridium, and at least one oxide, nitride or carbide of at least one metal selected from the group consisting of elements belonging to groups 4, 5 and 13 of the periodic table is formed on the surface of the anode substrate

Oxygen-generating anode

Provided is a method capable of producing, in a simple and low-cost manner, an electrolysis electrode which can be used in alkaline water electrolysis and has superior durability against output variation. The method for producing an anode for alkaline water electrolysis includes: a step of dissolving lithium nitrate and a nickel carboxylate in water to prepare an aqueous solution containing lithium ions and nickel ions, a step of applying the aqueous solution to the surface of a conductive substrate having at least the surface composed of nickel or a nickel-based alloy, and a step of subjecting the conductive substrate to which the aqueous solution has been applied to a heat treatment at a temperature within a range from at least 450&#xb0; C. to not more than 600&#xb0; C., thereby forming a catalyst layer composed of a lithium-containing nickel oxide on the conductive substrate.

Method for producing anode for alkaline water electrolysis, and anode for alkaline water electrolysis

A device for producing an organic hydrideof an aspect of the present invention has an electrochemical cell provided with an anodeon a surface of an electrolyte membraneand a cathode including a cathode catalyst layerand a cathode diffusion layeron another surface of the electrolyte membrane. A gap is provided between the anodeand the electrolyte membrane. The anodehas a network structure with an aperture ratio of 30 to 70%, and has an electrical supply supporting material formed of an electronic conductor and the electrode catalyst held by the electrical supply supporting material.

Device for manufacturing organic hydride

The present invention provides a novel oxygen reduction catalyst having a good stability and a high oxygen reduction performance. The oxygen reduction catalyst includes: a conductive oxide; and an oxide(s), having oxygen holes and provided at least on the surface of the conductive oxide, of at least one or more transition metals selected from the group consisting of Ti, Zr, Nb and Ta.

Oxygen reduction catalyst and production method therefor

Provided is an oxygen reduction catalyst having a high oxygen reduction performance. An oxygen reduction catalyst according to the present embodiment includes a transition metal oxide to which an oxygen defect is introduced, and a layer that is provided on the transition metal oxide and that contains an electron conductive substance. A method for producing an oxygen reduction catalyst according to the present embodiment includes heating a transition metal carbonitride as a starting material in an oxygen-containing mixed gas. In addition, a method for producing an oxygen reduction catalyst according to the present embodiment includes heating a transition-metal phthalocyanine and a carbon fiber powder as starting materials in an oxygen-containing mixed gas.

Oxygen reduction catalyst and method for producing the same

A corrosion-resistant electrode catalyst for oxygen reduction includes a main catalyst composed of at least one transition metal oxide selected from oxygen-deficient ZrO, TaO, NbO, TiO, VO, MoO, and WOand a co-catalyst composed of gold. The electrode catalyst is used in contact with an acidic electrolyte at a potential at least 0.4 V higher than the reversible hydrogen electrode potential. The catalyst may be used, for example, in such a form that the transition metal oxide in the form of fine particles and gold in the form of fine particles, or fine particles including fine gold particles coated with the transition metal oxide are dispersed on a catalyst carrier which is an electron conductive powder. This electrode catalyst is suitable as an electrode catalyst for an electrochemical system using an acidic electrolyte in the fields of water electrolysis, inorganic/organic electrolysis, fuel cells, etc.

Corrosion resistant metal oxide electrode catalyst for oxygen reduction

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Yokohama, Japan

Shigenori Mitsushima