Composite and production method thereof, dispersant, electrode, ion exchange membrane-electrode junction, and solid electrolyte type electrolytic apparatus

JP2023183051A5Active Publication Date: 2025-03-21IDEMITSU KOSAN CO LTD
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Patent Information

Application Number
JP2022096436
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2022-06-15
Publication Date
2025-03-21
Estimated Expiration
2042-06-15

AI Technical Summary

Technical Problem

Existing methods for synthesizing Ag nanoparticles as carbon dioxide reduction catalysts face challenges in achieving small particle sizes, high active site density, and large-scale production efficiency, while surface protectants used to prevent aggregation cause surface poisoning.

Method used

A composite production method involving a carrier-supported metal catalyst, using a resin with alkylammonium groups, ultraviolet irradiation, and a halide to suppress particle aggregation, enhancing dispersion and reducing particle size, thereby improving production efficiency and current density.

Benefits of technology

The method produces a composite with high active site density for carbon dioxide reduction, reducing particle aggregation and surface poisoning, leading to increased production efficiency and current density of synthesis gas containing CO.

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Abstract

To provide a composite having the high production efficiency and current density of a syngas including CO and a production method thereof, an electrode, an ion exchange membrane-electrode junction and an electrolytic apparatus, and a dispersant with excellent poisoning suppression.SOLUTION: A production method of a composite, in which at least one metal chosen from among a group of gold, silver, copper, rhodium, palladium, and platinum is carried on a carrier, comprises: a mixture step in which a solvent, an alkylammonium-based resin, a metallic compound including the metal, and a halide are mixed; an irradiation step in which a mixed solution obtained in the mixture step is irradiated with an ultraviolet light; and a carrier adding step in which the carrier is added into the mixed solution after the irradiation step.SELECTED DRAWING: None
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