De Nora Permelec Ltd

Kawasaki Jukogyo Kabushiki Kaisha

Yokohama National University

Industrie De Nora S.p.a.

National University Corporation Yokohama National University

Takaaki Nakai

Akihiro Kato

Awaludin Zaenal

Yoshinori Nishiki

Shigenori Mitsushima

Ikuo Nagashima

Yoshiyuki Kuroda

Tatsuya Taniguchi

Takayuki Yamamoto

Akihiko Inomata

Akihiro Madono

Osamu Arimoto

Fumiya Tsujii

Katsumi Hamaguchi

Sayaka Fukuda

Shohei Takatsu

Ayaka Nagai

The present invention provides a simple method for producing an electrode having improved oxygen evolution reaction (OER) activity without a need for catalyst coating and an electrode produced by this production method. The method is a method for producing an electrode including a step of subjecting an electrically conductive substrate comprising a nickel alloy comprising 30 to 70% by mass of Ni and 30 to 70% by mass of Fe, provided that Ni+Fi=100% by mass, to a thermal treatment, and a step of etching the thermally treated electrically conductive substrate with an etchant comprising at least any acid of an organic acid and a weak inorganic acid. The electrode is an electrode that is produced by this production method and that is useful as an oxygen evolution anode or the like.

Method for manufacturing electrode, and electrode

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

A membrane electrode assembly includes a rod-shaped or tubular anode, an anode terminal connected to the anode, a cathode disposed at a position apart from the anode so as to face the anode, and a membrane that separates the anode from the cathode. The cathode includes a line-shaped or strip-shaped cathode-supporting portion and a cathode claw that extends to the left, right, or both left and right from the cathode-supporting portion and that is curved along an outer periphery of the anode. The cathode-supporting portion and the cathode claw form an anode-holding portion of the cathode. The membrane includes a membrane strip, and the membrane strip is disposed on the cathode claw to be in contact with the cathode claw so that the anode is held by the anode-holding portion of the cathode with the membrane strip therebetween.

Membrane electrode assembly and electrolyzed water production device using the same

Growing community of inventors

Fujisawa, Japan

Takaaki Nakai