Preparation method of nickel boride base oxygen evolution catalyst

Abstract

The invention provides a preparation method of a nickel boride base oxygen evolution catalyst. The method comprises the following steps that a nickel net used for an afflux base is soaked in diluted hydrochloric acid to remove an oxidation layer, then ultrasonically washed with ethyl alcohol and redistilled water in sequence, and dried on the vacuum condition for standby application; a cobalt nitrate water solution and a sodium hydroxide solution of sodium borohydride are prepared respectively, and dissolved oxygen in the cobalt nitrate water solution and the sodium hydroxide solution of the sodium borohydride are removed for standby application; the nickel net is sequentially soaked in the cobalt nitrate water solution and the sodium hydroxide solution of the sodium borohydride, one-timesoaking in the cobalt nitrate water solution and the sodium hydroxide solution of the sodium borohydride is taken as one circulation, the circulation is repeated for a plurality of times, and a cobaltboride nanometer layer is generated on the surface of the nickel net and dried to obtain the nickel boride base oxygen evolution catalyst. The preparation method has the following beneficial effectsthat in comparison with a conventional method of synthesizing boride powder firstly and then dripping and spraying the solution to the afflux base, higher electrochemical stability and activity are possessed.

Description

technical field [0001] The invention relates to a preparation method of a nickel boride-based oxygen evolution catalyst, belonging to the technical field of electrochemical catalysis. Background technique [0002] Hydrogen energy is a non-polluting and renewable energy source with the advantages of high combustion value and abundant reserves, and is the most potential energy carrier. The method of producing hydrogen by electrolyzing water has high efficiency, mature technology and simple equipment, and is applicable to various occasions. However, this method also has the disadvantages of high energy consumption and high cost; the current difficulty in the electrolysis of water for hydrogen production is the development of electrocatalysts, especially the oxygen evolution reaction (OER) at the anode usually requires a large overpotential, so the development of new and efficient Oxygen evolution reaction electrocatalyst is very necessary. [0003] At present, the most excell...

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Problems solved by technology

The electrocatalyst prepared by this method usually has poor stability, and the catalyst falls off obviously during the electrochemical test.

And if some binders or protective agents are added to improve the stability when constructing the electrode, it will lead to a decrease in the electrocatalytic activity of the material.

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