Preparation method of high-activity CoB catalyst

Abstract

The invention discloses a preparation method of a high-activity CoB catalyst, which comprises the following steps of: weighing cobalt chloride hexahydrate, putting the cobalt chloride hexahydrate into a mortar, conducting mechanical grinding, slowly adding urea into the cobalt chloride hexahydrate, and fully grinding the cobalt chloride hexahydrate and the urea in the mortar until the cobalt chloride hexahydrate and the urea are uniformly mixed; uniformly dispersing sodium borohydride into the mixture, and fully conducting grinding while adding until the mixture is completely blackened to obtain a reaction product; and transferring the reaction product into another container, adding distilled water, conducting centrifuging, separately conducting washing with ethanol and distilled water for three times, and carrying out vacuum drying on the obtained solid at 60 DEG C for 12 hours to obtain the high-activity CoB catalyst. The CoB catalyst with strong ferromagnetism and excellent catalytic hydrogen production performance is synthesized through solid reaction at room temperature, the prepared catalyst is spherical particles with uniform morphology, the particle size is 30-50 nm, the preparation method is simple, the process is easy to control, the solid reaction process is short, and the reaction speed is high.

Description

technical field [0001] The invention belongs to the field of catalytic hydrogen production materials, and in particular relates to a preparation method of a highly active CoB catalyst. Background technique [0002] With the intensification of global energy crisis and environmental pollution, hydrogen energy has attracted widespread attention due to its clean, efficient and renewable advantages. Considering the storage and transportation of hydrogen energy, chemical hydrides are considered as ideal hydrogen storage materials. Sodium borohydride (NaBH 4 ) has attracted special attention due to its high hydrogen storage capacity (10.8 wt.%), controllable hydrogen production rate, and non-toxic by-products. while NaBH 4 It is necessary to promote its hydrolysis reaction under the action of a suitable catalyst to efficiently release pure hydrogen at room temperature. Therefore, the development of high-efficiency catalysts is very important for NaBH 4 Hydrogen production from ...

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Problems solved by technology

[0003] For NaBH 4 CoB-based catalysts for hydrogen production by hydrolysis are usually prepared by chemical reduction, but the catalyst particles are easy to agglomerate during the preparation process, which reduces the effective surface area and the number of active sites, resulting in unsatisfactory catalyst performance. 4 The hydrogen production rate of the hydrolysis reaction is slow

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