Electrolyzed seawater hydrogen production catalyst based on MXene and transition metal carbide composite nanostructure and synthesis method thereof

Abstract

The invention discloses an electrolyzed seawater hydrogen production catalyst based on a MXene and transition metal carbide composite nanostructure and a synthesis method thereof, and belongs to the field of nanomaterials and catalysis. The catalyst consists of MXene of coating transition metal carbide nanoparticles by uniform-loaded nanocarbon. The preparation method comprises the following steps: the MXene, metal salt, pH buffer solution and a carbon source precursor are dissolved and mixed uniformly for centrifugation, washing, freezing and drying to obtain a mixture, and are calcined at high temperature in an inertia atmosphere to obtain a structure and component-controllable two-dimensional nanostructure electrocatalyst. The electrocatalyst can overcome the problem of reduction of performances caused by agglomeration and sintering of nanoparticles in the preparation and reaction process of trasition metal carbides, and solves the basic difficulties perplexing the performance exertion and application of the transition metal carbide nanocatalyst; and under the condition of approaching neutrality, excellent catalysis activity and stability are achieved on electrolyzed seawater hydrogen production, and the foundation is laid for wide application of the electrolyzed seawater hydrogen production technology.

Description

technical field [0001] The invention belongs to the field of nanomaterials, energy and catalysis, and relates to an electrolytic seawater hydrogen production catalyst based on a composite nanostructure of MXene and transition metal carbide and a synthesis method thereof. Background technique [0002] Hydrogen energy is regarded as one of the most potential new energy sources in the 21st century due to its advantages of cleanliness, efficiency, safety, and sustainability. At present, the industrial hydrogen production methods mainly include hydrogen production by electrolysis of water, hydrogen production by coal gasification, hydrogen production by steam reforming of natural gas, etc. Among them, the process of hydrogen production by electrolysis of water is clean and efficient, and the hydrogen production purity is high, which is a hydrogen production technology that has attracted much attention. one. At present, the electrolytic hydrogen production catalysts used in indus...

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Problems solved by technology

[0006] Aiming at the disadvantages of low activity and poor stability of existing electrolytic water catalysts under seawater conditions, the present invention provides a synthesis method for electrolytic seawater hydrogen production catalysts based on composite nanostructures of MXene and transition metal carbides. The prepared catalyst is composed of uniform Composition of MXene loaded with nanocarbon-coated transition metal carbide nanoparticles with a two-dimensional nanostructure

Among them, the size of transition metal carbide nanoparticles and the thickness of the nano-carbon coating layer are both several nanometers, which overcomes the problem that transition metal carbide nanocatalysts are easy to agglomerate during the preparation and reaction process and leads to performance degradation, and solves the problem that plagues transition metal carbides. The performance and application of nano-catalysts is a fundamental problem. The obtained electrolytic seawater hydrogen production catalyst pair exhibits excellent catalytic activity and stability for electrolytic seawater hydrogen production under near-neutral conditions.

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