High stability nanogold catalyst and preparation method thereof

A high-stability, nano-gold technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve long reaction time, high reaction temperature, preparation process Complex problems, to achieve the effect of high activity and stability, good repeatability, and simple process
CN103785380AActive Publication Date: 2014-05-14SHANDONG ZHAOJIN GROUP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG ZHAOJIN GROUP
Publication Date
2014-05-14

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Abstract

The invention relates to a high stability nanogold catalyst and a preparation method thereof. The nanogold catalyst is of a Yolk-Shell structure, the platinum is a shell, the gold is a core, and a gap for allowing a gold core to move is formed between the shell and the core. The preparation method of the high stability nanogold catalyst adopts dimethylformamide, polyhydric alcohols, an inorganic silver salt precursor, an inorganic platinum salt precursor, an inorganic silver salt precursor and a surface active agent as reaction raw materials, ammonia water, an inorganic salt containing halide ions and copper-containing inorganic salt as addition agents, the reaction raw materials and the additional agents react to synthesize gold / silver / platinum nano-particles with layered structure, and then silver is corroded by nitric acid, so as to obtain the high stability nanogold catalyst. The high stability nanogold catalyst and the preparation method provided by the invention have the advantages that the prepared non-loaded nanogold particles are packed by a multi-hole shell, so that the nanogold particles can keep high activity and stability, and influence of a carrier on the nanogold particles are also avoided.
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Description

technical field

[0001] The invention relates to a catalyst and a preparation method thereof, in particular to a high-stability nano-gold catalyst and a preparation method thereof, and belongs to the technical field of inorganic functional nanometer materials. Background technique

[0002] Since Professor Haruta of Japan discovered in the 1980s that gold (Au) nanoparticles loaded on transition metal oxides exhibited high catalytic activity for low-temperature oxidation of carbon monoxide (CO) (J.Catal.115,1989: 301- 309), gold catalysts have attracted much attention. Subsequent studies have found that gold nanoparticles exhibit good catalytic activity and selectivity in many important organic reactions, such as the oxidation of alcohols and aldehydes, the hydrogenation of unsaturated bonds, the oxidation of silanes, and the epoxidation of propylene. Compared with bulk gold, gold nanoparticles have a larger specific surface area, so it has better catalytic activity. However,...

Claims

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