Preparation method of nickel boride base oxygen evolution catalyst

A technology of catalyst and nickel boride, which is applied in the field of electrochemical catalysis, can solve the problems of reduced electrocatalytic activity of materials, poor stability of electrocatalysts, and catalyst shedding, and achieves low cost, high electrochemical stability and activity, and large The effect of mass production

Pending Publication Date: 2019-03-26
UNIV OF JINAN
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  • Abstract
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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

Method used

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  • Preparation method of nickel boride base oxygen evolution catalyst
  • Preparation method of nickel boride base oxygen evolution catalyst
  • Preparation method of nickel boride base oxygen evolution catalyst

Examples

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Embodiment 1

[0032] This embodiment relates to a preparation method of a nickel boride-based oxygen evolution catalyst, such as figure 1 As shown, it specifically includes the following steps:

[0033] Soak the nickel mesh used for the current-collecting base in dilute hydrochloric acid to remove the oxide layer, then use ethanol and double-distilled water to clean it ultrasonically, dry it under vacuum, and set aside;

[0034] Preparation concentration is the cobalt nitrate aqueous solution of 0.5mol / L and the sodium borohydride solution of 1mol / L dissolved in the sodium hydroxide solution of 0.1M respectively, and utilizes high-purity nitrogen to remove described cobalt nitrate aqueous solution and sodium borohydride respectively After the dissolved oxygen in the sodium hydroxide solution, set aside;

[0035] The nickel mesh is soaked successively in the sodium hydroxide solution of cobalt nitrate solution and sodium borohydride for 10 s, each soaking once in the sodium hydroxide soluti...

Embodiment 2

[0038] The only difference between this embodiment and Embodiment 1 is that the number of cycles is 1.

Embodiment 3

[0040] The only difference between this embodiment and embodiment 1 is that the number of cycles is 2.

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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...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B11/03C25B1/04
CPCC25B1/04C25B11/031C25B11/051C25B11/075Y02E60/36
Inventor 姜媛媛逯一中房雅婷陈传霞倪朋娟
Owner UNIV OF JINAN
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