US 12,758,950 B2 · Nikel iron-based catalyst doped with metal having electronegativity lower than that of Ni and Fe, manufacturing method thereof, and alkaline water electrolysis system

Abstract

The present invention relates to a Ni—Fe-based catalyst for OER doped with a metal having lower electronegativity than Ni and Fe, and a method for manufacturing the same. More specifically, the present invention offers the advantage of using nickel, a non-noble metal-based active catalyst, which has high economic value without the need for noble metals. The present invention provides a method for manufacturing a Ni—Fe-based catalyst for OER that exhibits excellent activity in oxygen generation reaction by maximizing the surface area compared to existing noble metal-based catalysts, thereby contributing significantly to the cost reduction of hydrogen production.

Claims8

Dependent claims

A doped Ni—Fe-based catalyst for OER, comprising an alloy comprising Fe;

Ni;
and a metal selected from the group consisting of Al, Cd, and Zn, wherein the alloy comprises Ni and Fe at a molar ratio of 9:1 to 3:2, wherein the alloy comprises said metal at a molar ratio of 5 mol % to less than 10 mol % based on total moles of Ni, Fe, and said metal in the alloy, and wherein the alloy is obtained by thermally treating Ni, Fe, and said metal, or precursors thereof, in a reducing gas atmosphere comprising hydrogen at a temperature of from 1000° C. to 1500° C., inclusive, for a duration of from 50 seconds to 100 seconds, inclusive.

Dependencies are inferred from the claim text.

Facts

Application

18/266,678Filed 19 Apr 2023

Priority

KR 10-2022-018830929 Dec 2022

Published

US 2025/0083134 A113 Mar 2025

Granted

13 Oct 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

B01J 23/76
Of the iron group metals or copper: combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
B01J 37/08
Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts: heat treatment
B01J 37/16
Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts: reducing
C25B 1/04
Hydrogen or oxygen: by electrolysis of water

Nikel iron-based catalyst doped with metal having electronegativity lower than that of Ni and Fe, manufacturing method thereof, and alkaline water electrolysis system

Life of this patent

Nikel iron-based catalyst doped with metal having electronegativity lower than that of Ni and Fe, manufacturing method thereof, and alkaline water electrolysis system

Life of this patent

Abstract

Claims8