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FeCoMoPB amorphous nanoparticle oxygen evolution catalyst and preparation method thereof

A nanoparticle and catalyst technology, applied in electrodes, electrolysis processes, electrolysis components, etc., can solve the problems of poor stability, low oxygen evolution catalytic performance, etc., and achieve improved structural stability and durability, simple preparation process, and easy operation. Effect

Active Publication Date: 2021-06-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Purpose of the invention: Aiming at the problems of low oxygen evolution catalytic performance and poor stability of existing non-noble transition metal boron / phosphide amorphous nanomaterials, the present invention provides a micro-doped FeCoMoPB amorphous with high catalytic activity Nano particle oxygen evolution catalyst, and a preparation method of the oxygen evolution catalyst is provided

Method used

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  • FeCoMoPB amorphous nanoparticle oxygen evolution catalyst and preparation method thereof
  • FeCoMoPB amorphous nanoparticle oxygen evolution catalyst and preparation method thereof
  • FeCoMoPB amorphous nanoparticle oxygen evolution catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Preparation (Fe 50 co 50 ) 97 Mo 3 PB amorphous nanoparticles, the preparation process is as follows:

[0034] Step 1, weigh 0.2893g of ferrous chloride tetrahydrate, 0.3461g of cobalt chloride hexahydrate, 0.0218g of sodium molybdate dihydrate, and 0.9539g of sodium hypophosphite monohydrate, mix them evenly, and dissolve them completely with 50mL of deionized water, stir Uniformly, the reaction precursor solution is obtained;

[0035] 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;

[0036] Step 3, weigh 0.3405g of sodium borohydride, dissolve it in 15mL of deionized water, and configure it into a fresh solution of 0.6mol / L sodium borohydride;

[0037] Step 4, under strong mechanical stirring and high-purity nitrogen protection, add sodium borohydride solution dropwise to the precursor solution in the three-necked flask, and the dropping rate i...

Embodiment 2

[0045] Preparation with reference to Example 1 (Fe 50 co 50 ) 95 Mo 5 PB amorphous nanoparticles, the difference is that in step 1, 0.2833g of ferrous chloride tetrahydrate, 0.3390g of cobalt chloride hexahydrate, 0.0363g of sodium molybdate dihydrate, and 0.9539g of sodium hypophosphite monohydrate were weighed and mixed uniformly.

[0046] The prepared (Fe 50 co 50 ) 97 Mo 3 The morphology and structure of PB amorphous nanoparticles are as follows: figure 1 . Depend on figure 1 (a) In the transmission electron microscope (TEM) image, it can be seen that there is a secondary structure inside the nano-scale particles, and the small particles aggregate to form larger particles; no obvious diffraction rings or diffraction rings can be seen in the selected area electron diffraction pattern (SAED) Diffraction spots, proving that it is a completely amorphous structure. figure 1 The high-resolution TEM image of (b) shows that the prepared nanoparticles have an obvious core...

Embodiment 3

[0049] Preparation with reference to Example 1 (Fe 50 co 50 ) 93 Mo 7 PB amorphous nanoparticles, the difference is that in step 1, 0.2773g of ferrous chloride tetrahydrate, 0.3319g of cobalt chloride hexahydrate, 0.0508g of sodium molybdate dihydrate, and 0.9539g of sodium hypophosphite monohydrate were weighed and mixed uniformly.

[0050] With reference to the test method of embodiment 1 the (Fe 50 co 50 ) 93 Mo 7 PB amorphous nanoparticles were used as oxygen evolution catalysts for electrolysis of water, and the oxygen evolution catalytic performance was tested.

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Abstract

The invention discloses a FeCoMoPB amorphous nanoparticle oxygen evolution catalyst and a preparation method thereof. The chemical formula of the oxygen evolution catalyst is (Fe50Co50)<100-x>MoxPB based on the mole percentage content of each atom, wherein x is equal to 1-10. The preparation method of the oxygen evolution catalyst comprises the following steps: mixing water-soluble ferrite, a cobalt salt, molybdate and sodium hypophosphite, adding deionized water, stirring until complete dissolution to obtain a reaction precursor solution, and then introducing protective gas to remove oxygen in the solution; preparing an aqueous solution of sodium borohydride; slowly dropwise adding the sodium borohydride solution into the precursor solution, fully reacting, and keeping intense stirring and continuously introducing protective gas in the dropwise adding and reacting process; and carrying out suction filtration on the reacted solution, cleaning the obtained precipitate, and carrying out vacuum drying to obtain the FeCoMoPB amorphous nanoparticles with a core-shell structure. Through micro doping of the Mo element and the synergistic effect of multiple elements, the oxygen evolution catalytic performance, structural stability and durability of the Fe-Co-P-B amorphous nano-particle are greatly improved.

Description

technical field [0001] The invention relates to an oxygen evolution catalyst and a preparation method thereof, in particular to a FeCoMoPB amorphous nanoparticle oxygen evolution catalyst and a preparation method thereof, and belongs to the technical field of amorphous electrocatalysis water analysis oxygen. Background technique [0002] With the energy crisis and environmental pollution problems brought about by the development of the world economy, hydrogen, as a clean, efficient and sustainable non-fossil new energy, has great development prospects and is the focus of current energy research. Among various industrial hydrogen production methods, water electrolysis is considered to be one of the most promising methods due to its high energy conversion efficiency, clean production process, and easy operation. The electrolytic water system includes two half-reactions, which occur at the cathode and anode of the electrolyzer, respectively, called the cathodic hydrogen evoluti...

Claims

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Application Information

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IPC IPC(8): C25B11/075C25B1/04
CPCC25B1/04Y02E60/36
Inventor 沈宝龙李佳棋王倩倩李永杰邵根苗
Owner SOUTHEAST UNIV
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