Method for compounding ferronickel hydrotalcite nano-array compound structure by utilizing in situ self-sacrificing template process and application

A nano-array, composite structure technology, applied in the fields of electrocatalysis and material science, can solve the problems of affecting the stability of electrode catalytic activity, high cost, uneven dispersion, etc., to increase catalytic active sites, solve poor conductivity, good stability sexual effect

Active Publication Date: 2019-03-29
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the synthesis methods of such materials reported at this stage have limitations, such as complex processes, high costs, and high energy consumption; On dimensional substrates, these methods require additional binders. Inadequate binding of the catalyst on the electrode surface, poor contact, and uneven dispersion will lead to hindered charge transport, which seriously affects the catalytic activity and stability of the electrode.

Method used

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  • Method for compounding ferronickel hydrotalcite nano-array compound structure by utilizing in situ self-sacrificing template process and application
  • Method for compounding ferronickel hydrotalcite nano-array compound structure by utilizing in situ self-sacrificing template process and application
  • Method for compounding ferronickel hydrotalcite nano-array compound structure by utilizing in situ self-sacrificing template process and application

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Experimental program
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Embodiment 1

[0035] a) Pretreatment of nickel-iron alloy sheets: rinse the nickel-iron alloy sheets with water and ethanol repeatedly 5-6 times to remove surface impurities, place them in absolute ethanol for ultrasonic treatment for 3 minutes, take them out and rinse them repeatedly with ultrapure water for 4 times; / L hydrochloric acid for 5 minutes of ultrasonic acidification activation, take it out and rinse it with ultrapure water for 5 times; then place it in an oven at 80°C for 60 minutes;

[0036] b) Preparation of the reaction solution: a mixed solution of 5 milliliters of water and 25 milliliters of methanol was used as a solvent, 0.6 gram of cetyltrimethylammonium bromide and 0.0168 gram of potassium hydroxide were added to the solvent, stirred at room temperature until completely dissolved, Obtain reaction solution;

[0037]c) Place the nickel-iron alloy sheet dried in step a) in a 40 ml polytetrafluoroethylene lining, and pour the reaction solution obtained in step b) into the...

Embodiment 2-5

[0041] The preparation method of embodiment 2-5 is the same as embodiment 1, only change the volume of water and methanol in the preparation of step b) reaction solution, step c) in reaction temperature and reaction time parameters, specific reaction conditions are shown in Table 1.

[0042] Depend on figure 1 It can be seen that the nickel-iron alloy sheet substrate has an obvious three-dimensional channel structure; figure 2 It can be seen that the nickel-iron hydrotalcite-based nano-array composite structure prepared in Example 1 is a good needle-like nano-array structure with uniform size and uniform dispersion; the smoother surface of the needle-like array structure is image 3 clearly visible in.

[0043] The nickel-iron hydrotalcite nano-array composite structure obtained in Examples 1-5 of the present invention is used as the electrochemical performance test of the oxygen evolution reaction catalyst for electrolysis of water according to the following method:

[004...

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Abstract

The invention belongs to the technical field of material science and electro-catalysis and specifically relates to a method for compounding a ferronickel hydrotalcite nano-array compound structure byutilizing an in situ self-sacrificing template process. The method comprises the following steps: taking a ferro-nickel alloy as an electrode substrate and a reaction template; growing the ferronickelhydrotalcite nano-array compound structure, served as a catalyst for oxygen evolution reaction of electrolyzed water, on the ferro-nickel alloy by adopting the method for in situ self-sacrificing thetemplate. When the ferro-nickel alloy with the grown ferronickel hydrotalcite nano-array compound structure is placed into an electrochemical three-electrode test system and is used as an oxygen evolution electrode of electrolyzed water in an alkaline medium, efficient proceeding of oxygen evolution reaction of electrolyzed water under lower impressed voltage with high stability can be guaranteed. The preparation process according to the invention is simple; the required raw materials are low-cost and extensive in source; the method is cost-saving, is beneficial to industrial production and has a bright application prospect.

Description

technical field [0001] The invention belongs to the technical field of material science and electrocatalysis, and specifically relates to a method for synthesizing a nickel-iron hydrotalcite nano-array composite structure from an in-situ self-sacrificing template and its product and application. Background technique [0002] Due to the limited reserves of fossil energy and the environmental pollution caused by combustion, the energy problem has become a major problem that human society needs to solve urgently. Electrocatalytic water splitting offers a sustainable strategy to provide clean energy through cathodic hydrogen evolution reaction and anodic oxygen evolution reaction. For the oxygen evolution reaction in water electrolysis, which is kinetically unfavorable due to multiple steps of proton-coupled electron transfer, efficient catalysts are essential. So far, noble metal oxides, such as ruthenium dioxide and iridium dioxide, have shown high performance in the catalysi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/10B01J35/02C25B1/04C25B11/06
CPCB01J23/755B01J35/0033B01J35/02B01J35/1004C25B1/04C25B11/073Y02E60/36
Inventor 周玥陈晓东孟超林孟昌
Owner SHANDONG UNIV OF SCI & TECH
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