High-efficiency bifunctional water decomposition electrocatalyst and preparation method thereof

A dual-function, catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of difficult to improve the electrocatalytic activity of cobalt selenide electrode materials, poor active surface area, and electron transport. Influence and other issues, to achieve good hydrogen evolution and oxygen evolution activity, good stability
CN110479320AActive Publication Date: 2019-11-22INNER MONGOLIA UNIV FOR THE NATITIES
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INNER MONGOLIA UNIV FOR THE NATITIES
Publication Date
2019-11-22

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Abstract

The invention provides a high-efficiency bifunctional water decomposition electrocatalyst and a preparation method thereof, and relates to the technical field of electrocatalytic water decomposition.The preparation method comprises the following steps: mixing cobalt acetate, ammonium fluoride, urea and a solvent to obtain a mixed solution; immersing carbon cloth into the mixed solution for hydrothermal reaction to obtain carbon cloth with a cobalt nanorod precursor growing on the surface; and then carrying out electrochemical conversion on the carbon cloth with the cobalt nanorod precursor growing on the surface to obtain the efficient bifunctional water decomposition electrocatalyst. A three-electrode system is adopted in electrochemical conversion, carbon cloth with a cobalt nanorod precursor growing on the surface serves as a working electrode, a saturated calomel electrode serves as a reference electrode, and a mixed solution of selenium dioxide, potassium chloride and water serves as an electrolyte. The electrocatalyst prepared by the invention has high hydrogen evolution activity, high oxygen evolution activity and good stability, can efficiently realize full water decomposition, and promotes the electrocatalytic water decomposition to develop towards the practical direction of higher current density and lower external potential.
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Description

Technical field

[0001] The present invention relates to the technical field of electrocatalytic water splitting, in particular to a high-efficiency dual-function water splitting electrocatalyst and a preparation method thereof. Background technique

[0002] As a new energy conversion technology that can obtain renewable hydrogen energy, electrocatalytic water splitting technology has attracted more and more attention. The electrolysis of water consists of two half reactions: (1) the hydrogen precipitation reaction at the cathode; (2) the oxygen precipitation reaction at the anode. However, due to the poor adsorption energy of proton hydrogen and molecular oxygen on the electrode surface, a large amount of energy is consumed in the actual water electrolysis process. Therefore, the single reaction of hydrogen precipitation and oxygen precipitation is difficult to proceed, so high Active electrocatalyst to reduce the overpotential required in the reaction and accelerate the reactio...

Claims

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