Controllable synthesis method of monoatomic catalyst with low cost and high loading capacity

Abstract

The invention discloses a controllable synthesis method of a monoatomic catalyst with low cost and high loading capacity, the monoatomic catalyst prepared by a method takes graphite-phase carbon nitride as a substrate, has the characteristics of low cost, high metal element loading capacity, controllable content and adjustable variety, and meanwhile, the method can be used for preparing the single-metal single-atom catalyst and a multi-metal single-atom catalyst, the single-atom catalyst has excellent catalytic activity and stability, and by taking the silver single-atom catalyst as an example, the visible light hydrogen production rate of the silver single-atom catalyst is 6.2 times that of silver nanoparticle-loaded graphite-phase carbon nitride, and after 60-hour continuous photocatalytic hydrogen production test, the hydrogen production rate is almost unchanged.

Description

Technical field: [0001] The invention relates to the field of single-atom catalysts, in particular to a controllable synthesis method of low-cost and high-loaded single-atom catalysts. Background technique [0002] The discovery and application of catalysts have played an important role in promoting industrial development, and catalysts are the core of them. Homogeneous catalysis has the advantages of good uniformity, high catalytic efficiency and selectivity, and high atom utilization, but there are difficulties in separation and recovery. question. However, the heterogeneous catalytic reaction occurs on the surface / interface of the catalyst, resulting in low atom utilization of traditional micro-nano catalysts, which restricts the application range of noble metal catalysts. In addition, the anisotropy of micro-nano catalysts makes the selectivity of catalytic reactions poor. , in 2011, Zhang Tao et al. proposed the concept of single-atom catalysis, which cleverly combined...

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Problems solved by technology

The study found that the prepared g-C 3 N 4 The preparation of single-atom catalysts for the support makes the single-atom loading very low due to the high coordination energy barrier; while in g-C 3 N 4 Although the in-situ loading of single atoms during the generation process solves the problem of coordination energy barriers, the melting of raw materials makes the metals easy to agglomerate

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