Pd composite nano-catalyst for hydrogen production by formic acid decomposition and preparation method of Pd composite nano-catalyst

Abstract

The invention discloses a Pd nano-composite catalyst for catalyzing formic acid decomposition to produce hydrogen and a preparation method of the Pd nano-composite catalyst, and belongs to the field of hydrogen storage materials. The catalyst is prepared by loading ultra-small Pd nanoclusters on the surface of a composite carrier composed of an inorganic carrier and amino-modified graphene oxide.The preparation method comprises the following steps: compounding graphene oxide and an inorganic nano material under the action of chemical bonds through long-time stirring; conducting amino modification on the outer surface of the graphene oxide, then adding a salt solution of Pd, and conducting sodium borohydride reduction to enable monodisperse Pd nano-clusters to be stabilized on the surfaceof the carrier, so as to obtain the Pd nano-composite catalyst which can be used for efficiently catalyzing decomposition of formic acid to produce hydrogen. The synthesis process provided by the invention is mild in condition, the catalyst has very high activity in catalyzing of formic acid decomposition to produce hydrogen under mild conditions, is easy to separate from a system after catalysisis finished, can be recycled, can be prepared on a large scale, is applicable to practical application, and has a wide application prospect in the fields of chemical hydrogen storage materials, fuel cells and the like.

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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