US 12,766,496 B2 · Electrochemical catalyst and preparation method therefor

Abstract

Provided are an electrochemical catalyst and a preparation method therefor. The preparation method for an electrochemical catalyst may comprise the steps of preparing a base metal aqueous solution containing a base metal, hydrothermally synthesizing a base structure containing an oxide of the base metal by using the base metal aqueous solution, and using a heat treatment method for the base structure in a sulfur (S)-containing reactive gas atmosphere, exchanging oxygen (O) on the surface of the base structure with sulfur (S) of the reactive gas to form a catalyst structure which has a core structure containing the oxide of the base metal and a shell structure containing a sulfide of the base metal.

Claims3

Dependent claims

An electrochemical catalyst comprising:

a core structure including a first cobalt oxide that comprises Co3O4, and a second cobalt oxide that comprises CoO;
and
a shell that is formed on a surface of the core structure, thereby resulting in a core-shell structure having a spherical shape, wherein the shell includes a first cobalt sulfide that comprises Co3S4, and a second cobalt sulfide that comprises CoS,
wherein a total weight of the electrochemical catalyst comprises 49 wt % or more of the first cobalt oxide, 40 wt % or less of the second cobalt oxide, 11 wt % or less of the first cobalt sulfide, and 0.5 wt % or less of the second cobalt sulfide to improve oxygen generation efficiency in an oxygen evolution reaction (OER).

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/757,458Filed 21 Dec 2020

Priority

KR 10-2019-017173720 Dec 2019

Published

US 2023/0024514 A126 Jan 2023

Granted

20 Oct 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

B01J 37/08
Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts: heat treatment
C25B 1/02
Products: hydrogen or oxygen
C25B 11/031
Perforated or foraminous: porous electrodes
C25B 11/042
Characterised by the material: electrodes formed of a single material

Electrochemical catalyst and preparation method therefor

Life of this patent

Electrochemical catalyst and preparation method therefor

Life of this patent

Abstract

Claims3