Chlorine corrosion resistant organic small molecule electrocatalytic electrode, preparation method and application thereof

By constructing a three-layer structure on the electrode—a conductive substrate, a molybdenum oxide intermediate layer, and a nickel hydroxide/nickel molybdate active layer—the corrosion problem of electrocatalytic small molecule oxidation electrodes in chlorine-containing media is solved, achieving high stability and high catalytic activity, suitable for PET plastic recycling and green hydrogen production.

CN122214909APending Publication Date: 2026-06-16NANJING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV
Filing Date
2026-03-18
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Existing electrocatalytic small molecule oxidation electrodes are susceptible to chloride ion corrosion in chlorine-containing media, exhibiting poor stability and rapid decay of catalytic activity, making them unsuitable for long-term operation in practical media such as seawater.

Method used

A three-layer composite structure of conductive substrate-intermediate layer-catalytic active layer is adopted. The intermediate layer is molybdenum oxide, and the surface of the catalytic active layer is modified with oxygen-containing anionic groups. The electrode is constructed in situ by electrostatically repelling chloride ions and combining hydrothermal, thermal treatment and electrochemical activation methods.

Benefits of technology

It achieves long-term stable operation of the electrode in highly corrosive chlorine-containing media, exhibits high catalytic activity, excellent Faraday efficiency and selectivity, is suitable for non-traditional water resource treatment, reduces energy consumption, and is applicable to PET plastic recycling and green hydrogen production.

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Abstract

The application discloses a chlorine corrosion resistant organic small molecule electrocatalytic electrode, a preparation method and application thereof, and belongs to the technical field of electrocatalytic materials. The catalytic electrode comprises a conductive substrate, an intermediate layer and a catalytic active layer; the intermediate layer is a molybdenum oxide and is used for blocking the contact of chlorine ions with the substrate; and the active layer comprises a nickel-based active component, and the surface of the nickel-based active component is modified with an oxygen-containing anion group and is used for electrostatic repulsion of chlorine ions. The preparation method comprises the following steps: preparing a mixed solution containing a molybdenum source, an etching agent and a dispersing agent; immersing foamed nickel and then performing oscillation treatment; and through hydrothermal reaction, heat treatment and electrochemical activation, the catalytic electrode is obtained. Through the construction of the three-layer structure of the substrate-intermediate layer-active layer, the electrode is endowed with excellent chlorine corrosion resistance and long-term stability, is suitable for organic small molecule electro-oxidation reaction in chlorine-containing media such as seawater and oil and gas field produced water, and has the advantages of high efficiency, energy saving, environmental protection and the like.
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