De Nora Permelec Ltd

Akihiro Madono

Osamu Arimoto

Takamichi Kishi

Suguru Takahashi

Akihiro Kato

Awaludin Zaenal

Takaaki Nakai

Mitsumasa Okamoto

Sayaka Fukuda

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

Provided are an electrolyzer having excellent durability against reverse current. The electrolyzerincludes an anode, an anode chamberhousing the anode, a cathode, a cathode chamberhousing the cathode, and a diaphragm that separates the anode chamberand the cathode chamber, wherein a reverse current absorption bodyformed of a sintered compact containing nickel is disposed in at least one of an inside of the cathode chamberand an inside of the anode chamber, and the reverse current absorption bodyis not directly coupled to the cathodeand the anodebut is electrically connected to at least one of the cathodeand the anode

Electrolyzer

Provided are an electrode for electrolysis having excellent durability against reverse current, and a method that enables production of the electrode for electrolysis at low cost. The electrode for electrolysisincludes a conductive substrateon which a catalyst layer is formed, and a reverse current absorption bodythat is coupled to the conductive substratein a detachable manner, wherein the reverse current absorption bodyis formed from a sintered compact containing nickel. The method for producing the electrode for electrolysisincludes a sintered compact formation step of obtaining the sintered compact by sintering a raw material powder composed of any one of Raney nickel alloy particles containing nickel and an alkali-soluble metal element, metallic nickel particles, and a mixture of Raney nickel alloy particles and metallic nickel particles, and a coupling step of coupling the sintered compact to the conductive substrate

Electrode for electrolysis, manufacturing method of electrode for electrolysis, and electrolyzer

Provided are an electrolytic cathode structure that can suppress the degradation of an activated cathode even if a reverse current flows upon the stoppage of operation of an electrolyzer in an electrode structure allowing the distance between the electrode and an electrode current collector to be maintained at an approximately constant value, and an electrolyzer using the same. The electrolytic cathode structure includes a metal elastic cushion membercompressed and accommodated between an activated cathodeand a cathode current collector. At least a surface layer of the cathode current collectorconsumes a larger oxidation current per unit area than the activated cathode. The electrolyzer is partitioned by an ion exchange membrane into an anode chamber for accommodating an anode and a cathode chamber for accommodating a cathode. The electrolytic cathode structure is used for the cathode.

Growing community of inventors

Fujisawa, Japan

Akihiro Madono