Pt-co bimetallic site self-supported integrated electrode and preparation method and application thereof

By constructing a Pt-Co dual-atom-site self-supporting integrated electrode on carbon cloth, the problems of high cost and resource scarcity of Pt-based catalysts are solved, and efficient and stable electrocatalytic hydrogen evolution in a strong acid environment is achieved. This is suitable for proton exchange membrane electrolysis of water to produce hydrogen, and the activity and stability of the catalyst are improved.

CN122147430APending Publication Date: 2026-06-05HEFEI INSTITUTE OF PHYSICAL SCIENCE CHINESE ACADEMY OF SCIENCES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI INSTITUTE OF PHYSICAL SCIENCE CHINESE ACADEMY OF SCIENCES
Filing Date
2026-05-08
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing Pt-based catalysts face challenges of high cost and resource scarcity in proton exchange membrane water electrolysis for hydrogen production. Single-atom catalysts struggle to meet catalytic performance requirements at high current densities, and current finite-domain systems lack structural stability in strongly acidic environments, making it difficult to achieve stable anchoring of two atomic sites and the transport and separation of reactant species.

Method used

A Pt-Co dual-atom site self-supporting integrated electrode is adopted. CoZn-MOFs nanosheet arrays are grown in situ on carbon cloth, and nano-onion carbon carriers are formed by high-temperature annealing. Cobalt single atoms are constructed by acid etching and platinum single atoms are anchored by carbon vacancy defects to form Pt-Co dual-atom sites. Combined with the hierarchical porous structure and high curvature surface of nano-onion carbon, the hydrogen overflow process is promoted.

Benefits of technology

It achieves highly efficient catalytic hydrogen evolution under ultra-low platinum loading, exhibiting excellent electrocatalytic activity and long-term stability, making it suitable for industrial-grade water electrolysis hydrogen production applications and significantly improving the utilization efficiency of precious metals.

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Abstract

The application belongs to the technical field of electrode materials, and particularly relates to a Pt-Co bimetallic site self-supporting integrated electrode and a preparation method and application thereof. The electrode takes carbon cloth as a substrate, and through in-situ growth of CoZn-MOFs, high-temperature annealing, acid washing etching and platinum impregnation anchoring, a nano-onion carbon loaded Pt-Co bimetallic site structure with carbon vacancy defects is prepared. By using a three-effect coupling mechanism of "confined catalysis-electric field enhancement-hydrogen overflow", at an ultra-low platinum loading (6.16 μg / cm 2 ), a 10 mA / cm² overpotential is only 14.1 mV in 0.5 M H2SO4; as a PEM electrolytic cell cathode, a 1.74 V cell voltage can drive 1000 mA / cm 2 for more than 1400 hours, solving the problems of high noble metal consumption, slow acid hydrogen evolution kinetics and poor stability of existing electrodes, and being suitable for industrial current density green hydrogen production.
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