Porous active charcoal material supporting cobalt nanoparticle material, preparation method, and application thereof

Abstract

The invention discloses a porous active charcoal material supporting cobalt nanoparticle material, which is prepared by performing hydrothermal treatment and subsequent treatment to glucose and a nitrogen-containing compound to obtain a porous carbon material, and supporting cobalt particles onto the carbon material through an impregnating chemical reduction method. The material is 3026-3277 m<2> / g in specific surface area, is more than 95.18% in micropore content, and has uniform distribution in pore size, which is mainly distributed in 1.24-1.95 nm. The preparation method includes the steps of: 1) preparing a nitrogen-containing precursor; 2) preparing the porous carbon material; and 3) supporting the cobalt nanoparticles. The material, when being used as a catalyst for catalyzing hydrolytic hydrogen release of ammonia borane, can complete the hydrogen release within 10 min, hydrogen release rate reaching 865.2 ml*min<-1>*g<-1>. The material can be recycled, and after circulation for 4 times, the hydrogen release time can be maintained in 10-45 min and hydrogen release rate can be maintained at 208.2-865.2 ml*min<-1>*g<-1>. The preparation method is simple and has low production cost. The material can be recycled, has good practicability, and has wide application prospect in the fields of hydrogen production, fuel cells, etc.

Description

technical field [0001] The invention relates to the technical field of carbon materials and hydrogen production by catalytic hydrolysis of ammonia borane, in particular to a method for preparing carbon materials, and the preparation and application of carbon-loaded cobalt nanoparticles. Background technique [0002] With the rapid development of the economy and the continuous growth of the population, the demand for energy is expanding day by day. Although fossil fuels still occupy a large proportion of the energy structure, fossil fuels are non-renewable resources and cause certain pollution to the environment. The resulting serious energy crisis has become increasingly prominent. The key factor to solve such problems is the development of new renewable low-carbon green energy and its efficient and clean storage and conversion technology. Hydrogen energy, as a secondary energy source with abundant reserves, high energy density, convenient use, and wide application, has att...

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Problems solved by technology

[0006] Wang et al prepared a catalyst by first preparing a porous carbon material, and then loading a copper-cobalt alloy on the porous carbon material, but the prepared porous carbon material has a small pore content and a low specific surface area, and the effect is significantly weakened after repeated use of the catalyst.

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