Preparation method of high-defect boron nitride supported atomic-scale dispersed metal catalyst

Abstract

The invention discloses a preparation method of a high-defect boron nitride supported atomic-scale dispersed metal catalyst and application of the high-defect boron nitride supported atomic-scale dispersed metal catalyst in the field of energy catalysis. The preparation method comprises the following steps: coating the periphery of a carbon nano tube with a boron nitride layer through a one-pot method for the first time, etching the surface of boron nitride by using a boric acid solution to produce a large number of defects, dipping in a metal salt solution, and pyrolyzing in an ammonia-argon mixed atmosphere to obtain the defect-rich boron nitride supported atomic-scale dispersed metal catalyst X (at) e-BN (at) CNT (X = Co, Ni, Fe and the like). The thickness of the prepared boron nitride coating layer is only 1.70 nm, the boron nitride coating layer is about five layers and has a large number of defects, and supported metal is evenly dispersed in an atomic scale. The preparation method of the atomic-scale dispersed metal catalyst is simple, the cost is low, and the atomic-scale dispersed metal catalyst has potential commercial application value in the field of energy catalysis and can be used for catalytic reactions such as electro-catalytic water decomposition, oxygen reduction reaction (ORR), carbon dioxide reduction reaction (CO2RR), organic catalytic reaction and zinc-air batteries and energy devices.

Description

technical field

[0001] The invention relates to the preparation of nanomaterials and the field of energy catalysis, in particular to the synthesis of an atomically dispersed metal catalyst supported by high-defect boron nitride and its application in the field of energy catalysis. Background technique

[0002] In recent years, metal atomically dispersed catalysts have become a research hotspot in the field of energy catalysis due to their ultra-high atomic utilization, unique physical and chemical properties, and excellent catalytic performance, and are widely used in the field of catalysis, such as thermocatalysis, Electrocatalysis, photocatalysis and other fields. In addition to constraining the atomic dispersion of metals, the support of metal atomically dispersed catalysts can also produce certain synergistic effects and affect the performance of catalysts. At present, the commonly used atomically dispersed metal catalyst supports are carbon materials, such as carbon na...

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