Cathode electrode, and composite of cathode electrode and substrate

The cathode electrode with a laminated structure of cuprous oxide and copper, and additional metals, enhances carbon dioxide reduction selectivity and stability for producing ethylene and ethanol, reducing hydrogen production and maintaining high efficiency over time.

JP7864303B2Active Publication Date: 2026-05-25FURUKAWA ELECTRIC CO LTD +2
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
FURUKAWA ELECTRIC CO LTD
Filing Date
2022-01-12
Publication Date
2026-05-25

AI Technical Summary

Technical Problem

Existing cathode electrodes for carbon dioxide reduction lack stability in producing organic compounds like ethylene and ethanol over long periods and have high selectivity for hydrogen production as a side reaction, necessitating improved selectivity and stability in carbon dioxide reduction reactions.

Method used

A cathode electrode with a laminated structure comprising a first layer of cuprous oxide and copper, and optionally other metals like silver, gold, zinc, or tin, and a second protective layer of the same metals, which enhances catalytic activity and controls water penetration, promoting carbon dioxide reduction over hydrogen production.

Benefits of technology

The laminated structure increases active sites for carbon dioxide reduction, reduces hydrogen selectivity, and maintains high selectivity for producing olefin hydrocarbons and alcohols like ethylene and ethanol, ensuring stable catalytic reactions over extended periods.

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Patent Text Reader

Abstract

To provide a cathode electrode in which the selectivity of hydrogen decreases and the selectivity of a carbon-dioxide reduced product material improves, in a catalytic reaction in which carbon monoxide, an olefin hydrocarbon such as an ethylene, and an alcohol such as an ethanol are produced by reducing carbon dioxide.SOLUTION: A cathode electrode for electronically reducing carbon dioxide comprises: a first layer including cuprous oxide, copper, and at least one kind of other metal elements chosen from the group of silver, gold, zinc, cadmium, and tin; and a second layer, formed on the first layer, including a constituent element composed of at least one kind of metal elements chosen from the group of copper, silver, gold, zinc, cadmium, and tin.SELECTED DRAWING: Figure 1
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