Nano fluffy NiMoCu catalyst and preparation method thereof

Abstract

The water electrolysis hydrogen production technology can produce green hydrogen on the basis of not consuming fossil energy, and the high-performance catalyst is adopted as an electrode material, so that the energy loss can be remarkably reduced, and the reaction efficiency is improved. The invention provides a nano fluffy NiMoCu catalyst and a preparation method thereof aiming at the current situation that the surface microstructure of the existing cathode catalyst is deficient and active sites are deficient, and belongs to the field of material preparation. According to the preparation method, an additive with a morphology adjusting effect is introduced into an electrolyte containing Ni, Mo and Cu elements, irregular particle bulges with nanoscale are distributed on the surface of the prepared nano fluffy NiMoCu catalyst, the prepared nano fluffy NiMoCu catalyst has sufficient reaction surface area and catalytic sites, the Tafel slope of the catalyst working in a 1M KOH solution is 70mV. Dec-1, the overpotential is 45mV when the current density is 10mA. Cm <-2 >, and the specific surface area of the catalyst is 10mA. Cm <-2 >. And the overpotential at a current density of 100 mA * cm <-2 > is 147 mV.

Description

technical field [0001] The invention belongs to the field of new energy and electrochemical catalysis, and in particular relates to a nano velvet NiMoCu catalyst and a preparation method thereof. Background technique [0002] Hydrogen is regarded as the most promising energy carrier due to its wide sources and non-polluting combustion products. Hydrogen production by water electrolysis can overcome the indirectness and diffusivity of renewable energy sources (such as solar energy, wind energy), thereby promoting their sustainable use and distribution. However, the slow kinetics of the two half-reactions in the water electrolysis system (i.e., the oxygen evolution reaction at the anode, OER, and the hydrogen evolution reaction at the cathode, HER) seriously hinder its wide application, and it is necessary to use efficient catalysts as electrode materials to promote it. dynamic performance. For the hydrogen evolution reaction, currently the best non-noble metal catalysts are...

AI Technical Summary

Problems solved by technology

However, the slow kinetics of the two half-reactions (i.e., the oxygen evolution reaction at the anode, OER, and the hydrogen evolution reaction, HER at the cathode) in the electrolytic water system seriously hinder its wide application, and it is necessary to use efficient catalysts as electrode materials to promote its Dynamic performance

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