Nickel monatomic catalyst and preparation method and application thereof

A catalyst and atomic technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. Low atomic load and other issues, to achieve the effect of low cost, weakened surface tension, and high loading rate
CN114682280APending Publication Date: 2022-07-01SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
Publication Date
2022-07-01

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Abstract

The invention relates to the technical field of nano catalytic materials, in particular to a nickel monatomic catalyst and a preparation method and application thereof. According to the preparation method, chitosan sol is adopted to provide a carbon source, a sodium silicate aqueous solution is adopted to provide a silicon source, the chitosan sol and the sodium silicate aqueous solution are mixed with a nickel salt aqueous solution within a proper pH range, and nickel-chitosan-sodium silicate ternary composite hydrogel with high nickel dispersion is rapidly formed under the supramolecular complexing action of the three components; the temperature is 243.1 DEG C, and the pressure is gt; and carrying out synchronous drying and carbonization treatment on the supercritical fluid with the pressure of 6.39 kPa to prepare the nickel monatomic catalyst. The preparation method is simple to operate, prevents excessive degradation of a pore network structure of the hydrogel, can furthest avoid the problem that metal atoms are easy to agglomerate due to high-temperature carbonization treatment in a conventional technology, effectively improves the loading capacity of nickel monatomic on a carbon-based carrier, and endows the nickel monatomic catalyst with excellent catalytic performance.
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Description

technical field

[0001] The invention relates to the technical field of nano-catalyst materials, in particular to a nickel single-atom catalyst and a preparation method and application thereof. Background technique

[0002] Single-atom catalysts (SACs) are a new type of catalytic materials that have emerged in recent years. SACs are usually formed by the uniform distribution of single metal atoms on a support. Compared with traditional supported catalysts, SACs have nearly 100% atomic utilization, high activity, good selectivity, excellent catalytic performance in various reactions, and greatly reduce the cost of noble metal catalysts. At present, a variety of SACs have been used in environmental, biological and other catalytic fields.

[0003] As an inexpensive metal, nickel is widely used in a variety of new chemical reactions, such as photocatalytic reactions, CO 2 Reduction, water splitting for hydrogen analysis, etc., have the advantages of green environmental protecti...

Claims

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