Preparation method and application of boron nitride loaded Ni-MoOx nano catalyst

Abstract

The invention discloses a preparation method and application of a boron nitride loaded Ni-MoOx nano catalyst. The preparation method comprises the following steps: preparing an aqueous solution of hexagonal boron nitride BN, and ultrasonically treating to obtain a uniformly dispersed hexagonal boron nitride BN aqueous solution; adding a NiCl2 aqueous solution into the BN aqueous solution in step I, and continuously stirring to obtain a mixed solution A; adding a Na2MoO4 aqueous solution into the mixed solution A, and continuously stirring to obtain a mixed solution B; adding 20-60 mg of sodiumborohydride NaBH4 into the mixed solution B, stirring for 5-15 minutes to perform reduction reaction, thereby obtaining the boron nitride loaded Ni-MoOx nano catalyst. The preparation method adopts aone-step quick reduction method to synthesize the boron nitride loaded Ni-MoOx nano catalyst, can be completed at room temperature and has the advantages of being short in synthetic time, simple andconvenience in operation and the like; the synthesized Ni-MoOx / BN catalyst can be used for catalyzing decomposition of hydrazine borane water solution 323K to produce hydrogen and the catalyst still has a 100% conversion rate in case of not adding any additive, 100% hydrogen gas selectivity, relatively good circulating stability and extremely high catalytic activity.

Description

technical field [0001] The invention relates to the field of catalyst preparation and the sustainable development of the environment and energy, in particular to a boron nitride supported Ni-MoO x Preparation methods and applications of nanocatalysts. Background technique [0002] As a clean and efficient green energy, hydrogen energy has attracted extensive research interest, and it can be widely used in power generation and fuel cells and other fields. However, traditional high-pressure tanks and low-temperature liquid hydrogen storage methods have disadvantages such as low efficiency, poor safety, and high cost. Therefore, the development of safe and efficient hydrogen storage methods is a current research hotspot. [0003] Hydrazine borane (N 2 h 4 BH 3 , HB), which is a safe and stable solid at room temperature with a hydrogen content as high as 15.4 wt%, and thus is considered as a promising chemical hydrogen storage material. Complete decomposition of hydrazine b...

AI Technical Summary

Problems solved by technology

[0004] At present, almost all catalysts used for the complete decomposition of hydrazine borane contain noble metal components, but problems such as high cost and limited reserves limit the large-scale practical application of noble metal-based catalysts.

However, in the reported non-precious metal catalysts, most of the conversions are only 50%, making the utilization of catalysts low.

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