Sulfur-phosphorus co-doped in-situ growth graphene coated nickel-cobalt-iron hydrogen evolution catalyst and preparation method thereof

Abstract

The invention discloses a sulfur-phosphorus co-doped in-situ growth graphene coated nickel-cobalt-iron hydrogen evolution catalyst, which is composed of Ni, Co, Fe, S and P in the form of phosphorus sulfide, is loaded on carbon paper, and has the general formula of (NixCoyFez) SvPu@CP, in the formula, x / y is more than or equal to 0 and less than or equal to 10, x / z is more than or equal to 0 and less than or equal to 10, v is more than or equal to 0 and less than or equal to 10, and u is more than or equal to 0 and less than or equal to 10. In addition, the invention further discloses a preparation method of the sulfur-phosphorus co-doped in-situ growth graphene coated nickel-cobalt-iron hydrogen evolution catalyst. The integrated (NixCoyFez) SvPu@CP catalyst electrode shows very prominent HER activity, has higher catalytic activity, higher hydrogen yield and more stable performance, can be widely applied to various hydrogen evolution electrolysis water catalysis, and has the advantages of energy conservation, environmental protection and low cost.

Description

technical field [0001] The invention relates to the technical field of catalytic materials, in particular to a trimetallic catalyst and a preparation method thereof. Background technique [0002] As people are increasingly concerned about energy crisis and environmental pollution, exploring sustainable energy to replace fossil fuels has become a common goal of global scientists. Hydrogen is considered to be the most potential substitute due to its zero carbon emission and high gravimetric energy density. Water electrolysis using electrocatalysts to facilitate the hydrogen evolution reaction (HER) has emerged as a promising method for hydrogen production. In water electrolysis, noble metals such as Pt are commonly used as electrocatalysts due to their high HER activity and stability across the entire pH range. However, their high cost and scarcity make them unsuitable for large-scale industrial production. Therefore, the development of low-cost noble-metal-free high-perfor...

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Problems solved by technology

Furthermore, these electrocatalysts only function in acidic or alkaline electrolytes, which limits their application in water electrolysis technologies that have different requirements on electrolyte pH.

[0004] At present, although there are many reports on transition metal monometallic and bimetallic catalysts, there has been no report on sulfur-phosphorus co-doped in-situ growth graphene-coated nickel-cobalt-iron hydrogen evolution catalysts.

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