Preparation method of flaky cuprous oxide/cobaltous oxide nano composite material and application of flaky cuprous oxide/cobaltous oxide nano composite material in catalyzing hydrolysis of ammonia borane to produce hydrogen

Abstract

The invention discloses a preparation method of a flaky cuprous oxide / cobaltous oxide nano composite material, which comprises the following steps: (1) dissolving soluble cobalt salt and copper salt in ultrapure water to prepare a mixed salt solution A; (2) dissolving a surfactant in ultrapure water, and adding tartrate to prepare a solution B; (3) slowly adding the solution B into the solution A,mixing to form a solution C, and stirring; (4) slowly dropwise adding an alkali solution into the solution C, and continuously stirring; (5) transferring to a reaction kettle, reacting at 120-180 DEGC for 2-24 hours, filtering, washing, collecting the product, and drying in a vacuum oven at 40-80 DEG C; and (6) calcining the dried powder at a low temperature of 200-300 DEG C for 0.1-5 hours. According to the invention, Tartrate is ingeniously selected as a complexing agent and a reducing agent, a simple hydrothermal synthesis method and low-temperature calcination treatment are adopted, andthe flaky cuprous oxide / cobaltous oxide nano composite material is successfully prepared.

Description

technical field [0001] The invention belongs to the field of catalysis and hydrogen storage materials, and in particular relates to a method for preparing a sheet-shaped cuprous oxide / cobaltous oxide nanocomposite material and its application in catalyzing the hydrolysis of ammonia borane to produce hydrogen. Background technique [0002] The increasing demand for energy and the excessive exploitation and use of traditional energy sources such as coal and oil have caused a series of environmental problems and energy crises. Finding a renewable clean energy to replace traditional energy has become a hot spot in current scientific research. Against this background, countries have successively developed and utilized a series of new energy sources such as solar energy, hydrogen energy, wind energy, water energy, biomass energy, geothermal energy, tidal energy and nuclear energy. Hydrogen energy has attracted extensive attention due to its high combustion calorific value and non...

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Problems solved by technology

[0004] Chinese patent (CN108837832A) has proposed a kind of nano Cu 2 The preparation method of O, the Cu 2+ Dispersed into the emulsion, using the method of radiation irradiation, the preparation of nano-Cu 2 O, but due to the use of a large amount of organic solvents in the reaction process and the use of radiation exposure, there are certain safety hazards in operation;

[0005] Chinese patent (CN106362766A) proposes a preparation method of CoO nano-flakes. At room temperature, cobalt acetylacetonate, ethylene glycol, and deionized water are mixed, stirred and subjected to hydrothermal reaction, then cooled to room temperature, cleaned, and then vacuum-dried CoO flakes with a two-dimensional crystal structure were obtained overnight, but the hydrothermal reaction time of this method is longer and the reaction temperature is higher

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