A kind of PD composite nano-catalyst and preparation method thereof for formic acid decomposition hydrogen production

Abstract

The invention discloses a Pd nanocomposite catalyst for catalyzing the decomposition of formic acid to produce hydrogen and a preparation method thereof, belonging to the field of hydrogen storage materials. The catalyst is prepared by loading ultra-small Pd nano-clusters on the surface of a composite support composed of an inorganic support and amino-modified graphene oxide. The preparation method comprises: compounding graphene oxide and inorganic nanomaterials under the action of chemical bonds by stirring for a long time, and then modifying the outer surface of graphene oxide with amino groups, then adding a Pd salt solution, and reducing the graphene oxide by sodium borohydride. The dispersed Pd nanoclusters are stabilized on the surface of the carrier, and the obtained Pd nanocomposite catalyst can be used to efficiently catalyze the decomposition of formic acid to produce hydrogen. The synthesis process of the present invention has mild conditions, and has very high activity in catalyzing the decomposition of formic acid to produce hydrogen under mild conditions. After the catalysis is completed, it is easy to separate from the system and can be recycled. And fuel cells and other fields have broad application prospects.

Description

technical field [0001] The invention relates to a Pd composite nano-catalyst for producing hydrogen by decomposing formic acid and a preparation method thereof, belonging to the field of hydrogen storage materials. Background technique [0002] Nowadays, air pollution and energy crisis caused by the extensive use of fossil fuels have become serious global problems. Finding and developing sustainable and clean energy is a fundamental way to solve environmental and socio-economic problems. Hydrogen is one of the most abundant elements in nature. Hydrogen is currently the most potential main energy carrier. It has a very large mass energy density, and its combustion products are green and clean. It is one of the most ideal fuels. With the rise of hydrogen fuel cell vehicles and the gradual development of hydrogen infrastructure in recent years, hydrogen energy economy has gradually become the future development trend. In addition to the preparation and application of hydrogen...

AI Technical Summary

Problems solved by technology

In recent years, there have been many studies on physical adsorption hydrogen storage materials such as carbon materials, molecular sieves, metal-organic frameworks (MOFs), and chemical hydrogen storage materials such as metal hydrides and hydrogen storage alloys. It is still difficult to meet the application requirements of the U.S. Department of Energy (DOE) and the International Energy Agency (IEA) for vehicle-mounted hydrogen energy systems in terms of cycle performance.

[0004] In order to avoid the problems of large size, high pressure, and high operating risk factor faced by direct hydrogen storage, some researchers have proposed a strategy of storing hydrogen in liquid fuel, and then producing hydrogen in situ through catalytic reactions for use in fuel cells.

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