Non-noble metal hydrogen evolution electrocatalyst based on synergistic modification and preparation method thereof

Abstract

The invention belongs to the technical field of hydrogen production materials, and discloses a non-noble metal hydrogen evolution electrocatalyst based on synergistic modification and a preparation method thereof. The catalyst is composed of a metal phosphide active phase, an oxide matrix phase and a carrier, wherein the metal phosphide active phase is dispersedly distributed on the surface of theoxide matrix phase in the form of fine nano-particles, and the oxide matrix phase is loaded on the carrier. According to the invention, the metal phosphide active phase is separated out through a phosphatization reaction and then combined with matrix oxide to construct synergistically catalytic active sites; moreover, the matrix oxide partially reduces the introduced oxygen vacancies, thereby being conducive to improving the electrical conductivity of the matrix material; in addition, when being heated, the precursor material generates a large amount of nano-pores due to dehydration or deamination, thus further improving the mass transfer performance of the catalyst while providing more active sites. Therefore, three factors intrinsic activity, number of active sites and electrical conductivity can be optimized simultaneously. The non-noble metal hydrogen evolution electrocatalyst based on synergistic modification is close to the noble metal Pt catalyst in comprehensive catalytic properties.

Description

technical field

[0001] The invention belongs to the technical field of hydrogen production materials, and in particular relates to a non-precious metal hydrogen evolution electrocatalyst based on synergistic modification and a preparation method thereof. Background technique

[0002] Hydrogen is a clean and efficient energy carrier, and its large-scale industrial application is expected to fundamentally solve global problems such as energy shortage and environmental pollution. Therefore, the development of hydrogen energy utilization technology has become the focus of energy development strategies of countries around the world. To promote the industrial application of hydrogen energy, it is necessary to build a complete hydrogen energy industry chain including hydrogen production, hydrogen storage, hydrogen fuel cells and other links, of which hydrogen production is the source. Among the existing hydrogen production methods, electrolysis of water has the longest development ...

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