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Amorphous nanoparticle oxygen evolution catalyst

A nanoparticle and catalyst technology, which is applied in the field of amorphous oxygen evolution catalyst and amorphous nanoparticle oxygen evolution catalyst, can solve the problems of low oxygen evolution catalytic performance and complicated preparation process, and achieve simple process, low preparation cost and low overpressure The effect of potential

Inactive Publication Date: 2020-12-01
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Purpose of the invention: Aiming at the existing transition metal boron / phosphide amorphous nanomaterials with complex preparation process and low oxygen evolution catalytic performance, the present invention provides an amorphous nanoparticle analysis method with simple preparation process and high catalytic activity. oxygen catalyst

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] Preparation of FeCoNi 1 PB amorphous nanoparticles, the preparation process is as follows:

[0032] Step 1, weigh 0.1988g (0.001mol) of ferrous chloride tetrahydrate, 0.2379g (0.001mol) of cobalt chloride hexahydrate, 0.2377g (0.001mol) of nickel chloride hexahydrate, and 1.2719g of sodium hypophosphite monohydrate (0.012mol) was uniformly mixed, and completely dissolved with 50mL deionized water, and stirred evenly to obtain a reaction precursor solution;

[0033] Step 2, the above-mentioned precursor solution is transferred to a three-necked flask, during which high-purity nitrogen is introduced to remove oxygen in the solution;

[0034] Step 3, weigh 0.2270 g (0.006 mol) of sodium borohydride, dissolve it in 15 mL of deionized water, and configure it into a fresh solution of 0.4 mol / L sodium borohydride;

[0035] Step 4, under strong mechanical stirring and inert gas protection, add sodium borohydride solution dropwise to the precursor solution in the three-necked ...

Embodiment 2

[0044] Preparation of FeCoNi 2 PB amorphous nanoparticles, the preparation process is as follows:

[0045] Step 1, weigh ferrous chloride tetrahydrate 0.1988g (0.001mol), cobalt chloride hexahydrate 0.2379g (0.001mol), nickel chloride hexahydrate 0.4754g (0.002mol), sodium hypophosphite monohydrate 1.6958g (0.016mol) was uniformly mixed, and completely dissolved with 50mL deionized water, and stirred evenly to obtain a reaction precursor solution;

[0046] Step 2, the above-mentioned precursor solution is transferred to a three-necked flask, during which high-purity nitrogen is introduced to remove oxygen in the solution;

[0047] Step 3, weigh 0.3206g (0.008mol) of sodium borohydride, dissolve it in 20mL of deionized water, and configure it into a fresh solution of 0.4mol / L sodium borohydride;

[0048] Step 4, under strong mechanical stirring and inert gas protection, add sodium borohydride solution dropwise to the precursor solution in the three-necked flask, and the dropp...

Embodiment 3

[0053] Prepare FeCoNi with reference to embodiment 1 1 PB amorphous nanoparticles, the difference is that in step 3, 0.1135 g (0.003 mol) of sodium borohydride was weighed, dissolved in 7.5 mL of deionized water, and prepared into a fresh solution of 0.4 mol / L sodium borohydride.

[0054] The final FeCoNi 1 The morphology of PB amorphous nanoparticles is similar to that in Example 1. However, due to the small amount of sodium borohydride added as a strong reducing agent, part of the precursor solution failed to fully react.

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Abstract

The invention discloses an amorphous nanoparticle oxygen evolution catalyst. The oxygen evolution catalyst comprises FeCoNiPB amorphous nanoparticles, and the preparation method of the oxygen evolution catalyst comprises the following steps: uniformly mixing water-soluble ferrite, cobalt salt and nickel salt, adding sodium hypophosphite, stirring until the sodium hypophosphite is completely dissolved to obtain a reaction precursor solution, introducing protective gas to remove oxygen in the solution, preparing an aqueous solution of sodium borohydride, slowly dropwise adding a sodium borohydride solution into the precursor solution, fully reacting, dropwise adding, keeping strong mechanical stirring and continuously introducing protective gas in the reaction process, carrying out suction filtration on the reacted solution, cleaning the obtained precipitate, and carrying out vacuum drying. According to the preparation method disclosed by the invention, the FeCoNiPB amorphous nanoparticles are prepared by adopting a one-step chemical reduction method, in the whole preparation process, heating, pH adjustment and surfactant or strong oxidant addition are not needed, the process is simple, the operation is simple and convenient, and the prepared FeCoNiPB amorphous nanoparticles show excellent electrocatalytic performance and have the advantages of low overpotential, low Tafel slope,high stability and the like.

Description

technical field [0001] The invention relates to an amorphous oxygen analysis catalyst, in particular to an amorphous nanoparticle oxygen analysis catalyst prepared by a chemical reduction method, and belongs to the technical field of amorphous electrocatalytic water analysis oxygen. Background technique [0002] At present, the energy crisis and environmental problems around the world are becoming more and more serious. The development of clean, efficient and sustainable non-fossil new energy is the key to solving environmental and energy problems. Oxygen evolution reaction (OER) is a crucial step in the conversion and storage of renewable energy, such as water electrolysis batteries, fuel cells, and zinc-air batteries, etc. The two half-reactions of electrolyzed water, that is, the cathodic hydrogen evolution reaction and the anodic oxygen evolution reaction, have a thermodynamic equilibrium potential under standard conditions, but in the actual reaction process, there are ...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J37/16C25B11/06C25B1/04
CPCB01J27/1853B01J37/16C25B1/04B01J35/23B01J35/33Y02E60/36
Inventor 沈宝龙李佳棋王倩倩邵根苗
Owner SOUTHEAST UNIV