Ru/MgO catalyst and preparation method and application thereof

Abstract

The invention relates to a Ru / MgO catalyst and a preparation method and application thereof, and belongs to the field of catalytic hydrogen production energy. The preparation method comprises: mixinga ruthenium tetrachloride solution and an electrolyte solution to obtain a mixed liquid, maintaining the temperature of the mixed liquid at 0-25 DEG C, and carrying out micro-plasma oxidation throughmagnesium metal as an anode to obtain the Ru / MgO catalyst. Compared with the existing other methods, the preparation method is convenient and has a simple process. Compared with the common non-precious metal catalyst, the preparation method utilizes cheaper ruthenium and has better catalytic performances. The prepared Ru nanoparticles are embedded in the porous magnesium oxide carrier and show strong interaction. The catalyst preparation method can simply and fast prepare a small portable hydrogen production catalyst, can produce catalysts with various shapes and volumes according to demands and has a great significance for future industrial production.

Description

technical field [0001] The invention belongs to the field of catalytic hydrogen production energy, and mainly relates to a Ru / MgO catalyst and its preparation method and application. Background technique [0002] As a clean renewable energy, hydrogen energy has the characteristics of abundant reserves, high calorific value, and no pollution to the environment during use, and has become the most promising alternative energy source. At present, the storage and utilization of hydrogen mainly include two aspects. For conventional hydrogen, it is usually compressed in heavy steel cylinders using high pressure; on the other hand, hydrogen can also be stored in some compounds, such as intermetallic hydrides, organic Liquid hydride, sodium borohydride, etc. This hydrogen storage method has the advantages of high hydrogen storage density and mild storage environment, so it has attracted extensive attention from researchers. Among them, sodium borohydride, as a compound (10.8wt%) wit...

AI Technical Summary

Problems solved by technology

At present, the catalysts used to catalyze the hydrolysis of sodium borohydride to produce hydrogen mainly include metals such as Pt, Ru, Co, and Ni. For noble metals such as Pt, their applications are limited due to their scarcity, high price, and difficulty in recycling; For non-noble metals Co and Ni, although some effective catalysts have been developed, they still cannot achieve the catalytic effect of noble metals on the whole; and for Ru (ruthenium) element, it not only has the characteristics of noble metals, but its price is higher than that of ordinary noble metals. Ru is much cheaper, so Ru is an ideal catalyst for hydrogen production by hydrolysis of sodium borohydride

At present, Ru as a catalyst mainly appears in the form of nanoparticles loaded on various supports, but these catalysts generally have poor binding force between the active component and the support, and it is easy to fall off from the support during the reaction process, resulting in a sharp decline in catalytic activity, etc. Disadvantages; therefore, finding an appropriate preparation method, improving the interaction force between the active ingredient and the carrier, and maintaining its high catalytic reaction efficiency is an urgent problem to be studied at present.

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