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A kind of highly dispersed non-precious metal catalyst and its preparation method and application

A non-precious metal and catalyst technology, which is applied in the field of preparation of highly dispersed supported catalysts, can solve the problems of high active component loading, high active center dispersion, and other problems, and achieve the effects of small restrictions, wide application and good stability

Active Publication Date: 2022-04-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The technology of the present invention solves the problem: in the preparation of highly dispersed catalysts, it is very difficult to simultaneously ensure the loading capacity of high active components and the degree of dispersion of high active centers

Method used

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  • A kind of highly dispersed non-precious metal catalyst and its preparation method and application
  • A kind of highly dispersed non-precious metal catalyst and its preparation method and application
  • A kind of highly dispersed non-precious metal catalyst and its preparation method and application

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preparation example Construction

[0049] 1. Preparation of active component precursors

[0050] (1) Synthesis of ZnO materials by precipitation method:

[0051] (1) Weigh 0.446g (1.5mmol) Zn(NO 3 ) 2 ·6H 2 O in a container, weighed 0.480g (12mmol) and added to the above container, then weighed 30ml of deionized water and added to the above container, stirred at 70°C for more than 0.5h to make the solution evenly mixed, and naturally cooled to room temperature. The reaction solution was centrifuged to collect the precipitate after centrifugation, and washed twice with deionized water to obtain the ZnO metal oxide precursor;

[0052] (2) Roasting: After the above-mentioned obtained product is dried in the air, it is calcined in the atmosphere to obtain a ZnO material with a high specific surface area. The atmosphere is inert gas, reducing gas or oxidizing gas; the inert gas is N 2 One or more of , He and Ar; the reducing gas is H 2 One or two of CO, reducing gas can also contain inert gas; oxidizing gas is...

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Abstract

The invention provides a highly dispersed non-noble metal catalyst and its preparation method and application. Through the atmosphere migration method, the characteristics of volatility of some metals, metal oxides or metal chlorides in a certain atmosphere or vacuum are used to make the active components A highly dispersed non-precious metal catalyst is formed by gas phase migration to the surface of the support and the reaction of surface functional groups. The prepared highly dispersed catalyst can achieve both high dispersion and loading capacity. Compared with the traditional supported catalyst, the highly dispersed catalyst prepared by the migration method has better catalytic activity, and the TOF is increased by about 6 to 100 times. The active components separated by the method can be recycled and reused, and the raw materials involved are cheap, which reduces the cost of catalyst preparation, is beneficial to large-scale production, and has good application prospects.

Description

technical field [0001] The invention belongs to the field of preparation of highly dispersed supported catalysts, and in particular relates to a highly dispersed non-precious metal catalyst and its preparation method and application. Background technique [0002] Heterogeneous catalysis plays a pivotal role in the modern chemical industry. It is estimated that about 85% of chemical processes involve catalytic reactions, and about 80% of industrial catalytic processes involve solid catalysts. Therefore, the research on solid catalysts has always been a hot topic in the field of chemistry. In recent years, with the deepening understanding of catalyst active centers, single-site catalysts with highly dispersed and well-defined active centers have attracted attention. In this type of catalyst, metal atoms are often highly dispersed on the support in the form of single atoms, diatoms or extremely small atomic clusters. Its reactivity depends on the nature of the metal itself an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/06B01J23/08B01J29/03B01J29/40B01J29/46B01J29/48B01J29/85B01J35/00B01J37/04B01J37/08C07C1/04C07C11/02C07C2/76C07C15/02C07C5/03C07C9/14C07C11/04C10G45/04
CPCB01J37/08B01J37/04B01J29/85B01J29/405B01J29/48B01J29/46B01J23/06B01J23/08B01J29/0341B01J29/0308C10G45/04C07C5/03C07C2/76C07C1/043C07C1/0445B01J35/391B01J35/394C07C9/14C07C15/02C07C11/04C07C11/02Y02P20/52
Inventor 焦峰丁一潘秀莲包信和
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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