A kind of n, s co-doped metal-free cns oxygen reduction catalyst and its preparation method

A catalyst and metal-free technology, applied in metal-air battery oxygen reduction reaction catalyst and fuel cell field, can solve problems such as environmental pollution and complicated preparation process, and achieve the effect of low cost, simple preparation process, and easy scale-up production
CN111933962BActive Publication Date: 2022-02-18DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DALIAN UNIV OF TECH
Publication Date
2022-02-18

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Abstract

An N, S co-doped metal-free CNS oxygen reduction catalyst and a preparation method thereof belong to the technical field of energy materials and electrochemistry. The present invention uses glucose as carbon source, with g-C 3 N 4 As nitrogen source and soft template agent, polysulfide as sulfur source, three-dimensional porous carbon material catalyst was synthesized by hydrothermal-calcination two-step method. The obtained CNS catalyst is a three-dimensional porous graphene-like structure, and the surface contains a large number of pore structures. The ORR of the catalyst has an initial potential of 1.01V and a half-wave potential of 0.88V in an alkaline electrolyte, which is higher than that of a commercial Pt / C catalyst. Good catalytic performance. The invention has a large number of channels, which can expose more active sites, which is conducive to the transmission of ORR reaction substances and the improvement of the ORR catalytic activity of the material; the selected reagent has low toxicity, wide source of raw materials, low cost, and the preparation process is simple and convenient. Green and pollution-free, easy to scale up production, and conducive to large-scale application; it can be used in acidic and alkaline primary and secondary batteries involving ORR, such as fuel cells and metal-air batteries.
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Description

technical field

[0001] The invention belongs to the technical field of energy materials and electrochemistry, and relates to a fuel cell and a metal-air battery oxygen reduction reaction catalyst. Specifically involving a glucose as carbon source, g-C 3 N 4 As N source, polysulfide as sulfur source, N, S co-doped metal-free CNS oxygen reduction catalyst and preparation method are synthesized by hydrothermal-calcination two-step method. Background technique

[0002] With the rapid development of society, problems such as energy crisis and environmental pollution are becoming more and more serious. Therefore, there is an urgent need to find new energy and conversion technologies for green and sustainable development. Fuel cells and metal-air batteries have the advantages of no pollution, high theoretical energy density and no noise, and are currently research hotspots. However, the development of fuel cells, metal-air batteries, etc. still faces a common challenge: the slo...

Claims

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