Preparation method of nano-flower-like cobalt-nickel phosphate growing on foam nickel

Abstract

The invention discloses a preparation method of nano-flower-like cobalt-nickel phosphate growing on foam nickel. The method comprises the following steps: 1) placing each piece of foam nickel in an organic cleaning agent for ultrasonic cleaning to remove the greasy dirt on the surface of the foam nickel, and then placing the foam nickel in a dilute acid solution for treatment; 2) respectively dissolving hexahydrate cobalt chloride, hexahydrate nickel chloride, urea and ammonium fluoride in secondary deionized water, and stirring to dissolve to get a solution 1; 3) transferring the solution 1 into a reactor with one piece of a foam nickel polytetrafluoroethylene lining treated in the step 1) for hydrothermal reaction to obtain a nano-flower-like cobalt-nickel carbonate hydroxide hydrate precursor growing on the foam nickel; and 4) transferring the precursor obtained by the step 3) into a reactor with a lining filled with Disodium hydrogen phosphate dodecahydrate dissolved in 50mL of the secondary deionized water, using a hydrochloric acid solution to adjust PH to 8.5 for reaction to obtain the nano-flower-like cobalt-nickel phosphate growing on the foam nickel. The nano-flower-like cobalt-nickel phosphate has excellent catalytic oxygen release performance, and can be used for catalytic electrolysis of water electrode materials. Compared with a noble metal RuO2 catalyst, the catalyst has low cost and good stability.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, in particular to a simple low-temperature hydrothermal reaction to prepare cobalt-nickel phosphate longer than foamed nickel in the shape of nanoflowers. Background technique [0002] Metal phosphate compounds, especially cobalt-nickel phosphate is an important functional material, cobalt-nickel phosphate due to the interconnected Co / NiO x and PO 4 The polyhedral structure of the composition has good electronic and magnetic properties. It has important application value in lithium batteries, electrolytic water hydrogen production catalytic electrode materials, metal-air batteries, super capacitors and other electrode materials. At the same time, it can also be used in ion exchange. Agents, adsorbents, magnetic materials, etc. [0003] Cobalt-nickel phosphate has great potential as a catalytic material, especially a catalytic material for electrolysis of water to produce hydrogen. Howeve...

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Problems solved by technology

However, the materials obtained by this method are impure and the morphology is difficult to control.

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