Composite silver oxide nickel-cobalt oxide electrode material, preparation method and applications thereof
A nickel-cobalt oxide and electrode material technology, applied in chemical instruments and methods, electrodes, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of poor catalytic activity and stability, and achieve controllable morphology , Stable catalytic performance and unique shape
Active Publication Date: 2019-11-05
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology
However, catalysts for oxygen evolution reaction under alkaline conditions have problems such as poor catalytic activity and stability, and further research is needed.
Method used
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Embodiment 1
[0030] A kind of preparation of NiCoO / AgO / nickel foam composite electrode material, comprises the following steps:
[0031] I. Pretreatment of foamed nickel substrate: select a cut 1×3cm 2 Nickel foam (purity is 99.8%, area density is 400g / cm 2 ) soaked in absolute ethanol, ultrasonic treatment for 15min, and then replaced with 2mol / L hydrochloric acid to continue ultrasonic treatment for 15min to remove the oil and oxide contamination layer on the surface, and finally rinse the nickel foam substrate with deionized water.
[0032] II. Two-step hydrothermal reaction on pretreated nickel foam to form NiCo LDH / Ag (nickel-cobalt double hydroxide doped with silver):
[0033] 1) Prepare diluted silver nitrate solution: Take 0.5 mL of silver nitrate solution with a concentration of 0.15 mol / L and add it to 39.5 mL of deionized water to obtain a diluted silver nitrate solution.
[0034] 2) Put the foamed nickel substrate pretreated in step I into the diluted silver nitrate solution,...
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Abstract
The invention discloses a composite silver oxide nickel-cobalt oxide electrode material, a preparation method and applications thereof, wherein the electrode material uses foam nickel as a substrate,layered nickel hydroxide grows on the surface of the substrate, silver oxide nanoparticles are attached to the layered nickel hydroxide, nano-wires grow on the sheet layer, and nickel-cobalt oxide nano-flowers grow on the nano-wires. The preparation method of the material comprises: preparing a first-step precursor salt solution, placing pre-treated foam nickel, and hydrothermally forming silver-doped layered nickel hydroxide; preparing a second-step precursor salt solution, placing in the foam nickel obtained in the previous step, hydrothermally forming silver-doped nickel-cobalt double hydroxide; and annealing in air to obtain a composite silver oxide nickel-cobalt oxide. According to the present invention, the combination of the surface active material and the foam nickel substrate is achieved; the simple preparation process is simple, time-saving, low energy consumption, energy-saving and environmentally friendly; and the product has large active area and excellent oxygen evolutioncatalytic activity, and is corrosion-resistant under alkaline conditions.
Description
technical field [0001] The invention relates to a nickel-cobalt oxide electrode material of composite silver oxide, a preparation method and an application thereof, and belongs to the technical field of electrolyzed water catalytic oxygen evolution. Background technique [0002] As the cornerstone of various production activities in human society, energy is the most important driving force for the development of human productivity. From ancient times to the present, fossil energy has been the main source of energy used by human beings, and its consumption rate has become faster and faster with the development of human beings. Especially since entering the industrialized society, the existing reserves will be exhausted within a few centuries. The consumption of fossil energy has also brought about environmental pollution. Therefore, the development of sustainable and clean alternative energy is a top priority. Since the hydrogen combustion process can release huge energy and...
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IPC IPC(8): C25B1/04C25B11/08B01J23/89B82Y30/00B82Y40/00
CPCC25B1/04B01J23/002B01J23/892B82Y30/00B82Y40/00B01J2523/00C25B11/057C25B11/093B01J35/33B01J2523/18B01J2523/845B01J2523/847Y02E60/36
Inventor 喻发全王蕾王建芝张肖笑谌伟民
Owner WUHAN INSTITUTE OF TECHNOLOGY