Preparation method for NiAu nano catalyst used for ammonia borane hydrogen-production

Abstract

The invention discloses a preparation method for a NiAu nano catalyst used for ammonia borane hydrogen-production, and belongs to the technical field of preparation of transition metal and noble metal binary materials in inorganic materials. The preparation method comprises the following steps of: firstly, dissolving nickel salt and chloroauric acid into oleylamine to prepare a mixed solution, magnetically stirring the mixed solution uniformly, and gradually heating the mixed solution to obtain NiAu nano particles through reducing action; and then, carrying out thermal treatment on a cleaned and dried NiAu sample in hydrogen-gas atmosphere to obtain the final NiAu nano catalyst. According to the preparation method disclosed by the invention, the prepared NiAu particles are uniform in dimension, are good in dispersity, have high catalysis efficiency for ammonia borane decomposition reaction, and can be converted into highly stable Au@NiO core-shell structures during reaction, so that cyclic catalytic activity (under 70% or more of decomposition conditions) not lower than 200 times is obtained. The NiAu prepared by the preparation method is a binary metal catalyst which is simple, efficient and stable, and can be used for catalytic fields of fuel cells, hydrogenation reaction, methane reforming and the like based on hydrogen production from ammonia borane decomposition.

Description

technical field [0001] The invention belongs to the technical field of preparation of transition metal and noble metal binary materials in inorganic materials, and in particular relates to a method for preparing NiAu binary nanoparticles. Background technique [0002] Transition metal materials are an important class of multifunctional materials, which have broad application prospects in storage devices and catalysts, and have attracted the attention of researchers. Generally, materials such as nano-platinum group (platinum, palladium, nickel) have excellent catalytic properties, and have been widely used in fuel cells in recent years. However, in the catalytic process, platinum group elements are very easily poisoned, resulting in a decrease in its catalytic performance, making it difficult for this catalyst to be widely used. In the past two decades, the rise of nanoscience and preparation technology has led researchers to discover that nanoscale gold (Au) particles can h...

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Problems solved by technology

However, in the catalytic process, platinum group elements are very easily poisoned, resulting in a decrease in its catalytic performance, making it difficult for this catalyst to be widely used.

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