Integrated transition metal-based oxygen evolution catalytic material and preparation method

A catalytic material, transition metal technology, applied in non-precious metal oxide coatings, electrode coatings, electrolysis processes, etc., can solve the problems of increasing electrode series resistance, easy agglomeration, hindering effective mass transfer, etc., to improve the ability to form amorphous Effect

Active Publication Date: 2021-07-02
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The research on traditional oxygen evolution catalytic materials is mostly concentrated in the powder state. On the one hand, it is easy to agglomerate during the oxygen evolution reaction process, which hinders the effective transmission of mass; on the other hand, these catalysts are loaded on the collector plate to increase the series resistance of the electrode. , so that the energy consumption increases

Method used

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  • Integrated transition metal-based oxygen evolution catalytic material and preparation method
  • Integrated transition metal-based oxygen evolution catalytic material and preparation method
  • Integrated transition metal-based oxygen evolution catalytic material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] With (Ni 0.4 co 0.4 P 0.2 ) 97 Ru 3 Amorphous and nanocrystalline alloy thin strips are used as precursors to prepare target electrodes, and the preparation method is as follows:

[0082] Step 1, mix target ingredients;

[0083] According to (Ni 0.4 co 0.4 P 0.2 ) 97 Ru 3 The target composition of the target is to weigh Ni, Co, P, Ru elemental elements in sequence, and the purity of each element is not less than 99.9%;

[0084] Step 2, preparing a master alloy;

[0085] In step 21, Ni and P are smelted in a vacuum induction melting furnace, the smelting protective atmosphere is argon with a mass percentage of 99.999%, and the vacuum degree is 3×10 -3 Pa, the smelting current is 80A, smelting for 6min, and NiP pre-alloyed ingot is prepared;

[0086] Step 22, put the NiP pre-alloyed ingot and Co and Ru elements into a vacuum arc melting furnace for melting, the melting protective atmosphere is argon gas with a mass percentage of 99.999%, and the vacuum degree ...

Embodiment 2

[0106] With (Ni 0.4 Fe 0.4 B 0.2 ) 97 Ru 3 Amorphous and nanocrystalline alloy thin strips are used as precursors to prepare target electrodes, and the preparation method is as follows:

[0107] Step 1, mix target ingredients;

[0108] According to (Ni 0.4 Fe 0.4 B 0.2 ) 97 Ru 3 The target composition of target weighs Ni, Fe, B, Ru elemental elements sequentially, and the purity of each element is not less than 99.0%;

[0109] Step 2, making master alloy;

[0110] Put the weighed Ni, Fe, B, Ru elements into a vacuum arc melting furnace for smelting, the smelting protective atmosphere is argon with a mass percentage of 99.999%, and the vacuum degree is 8×10 -3 Pa, smelting current is 90A, smelting 2min, smelting 5 times, prepared (Ni 0.4 Fe 0.4 B 0.2 ) 97 Ru 3 master alloy ingot;

[0111] Step 3, preparing an amorphous nanocrystalline alloy thin strip by a melt spin quenching method;

[0112] (Ni 0.4 Fe 0.4 B0.2 ) 97 Ru 3 The master alloy is mechanically c...

Embodiment 3

[0128] With (Ni 0.4 Fe 0.4 B 0.2 ) 97 Ru 1.5 Ir 1.5 Amorphous and nanocrystalline alloy thin strips are used as precursors to prepare target electrodes, and the preparation method is as follows:

[0129] Step 1, mix target ingredients;

[0130] According to (Ni 0.4 Fe 0.4 B 0.2 ) 97 Ru 1.5 Ir 1.5 The target components of Ni, Fe, B, Ru, Ir are weighed in sequence, and the purity of each element is not less than 99.0%;

[0131] Step 2, making master alloy;

[0132] Target Put the weighed Ni, Fe, B, Ru, and Ir elements into a vacuum arc melting furnace for melting. The melting protective atmosphere is argon with a mass percentage of 99.999%; the vacuum degree is 7.8×10 -3 Pa, smelting current is 90A, smelting 2min, smelting 6 times, prepared (Ni 0.4 Fe 0.4 B 0.2 ) 97 Ru 1.5 Ir 1.5 Master alloy ingot.

[0133] Step 3, preparing an amorphous nanocrystalline alloy thin strip by a melt spin quenching method;

[0134] The master alloy obtained in step 2 is mechani...

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Abstract

The invention discloses an integrated transition metal-based oxygen evolution catalytic material and a preparation method thereof. The prepared (Tm a N m b ) x R m y The oxygen evolution catalytic material is composed of a thin alloy strip composed of two layers of structure. One layer is a nanoporous layer doped with transition metal oxides or hydroxides with high catalytic activity and noble metals on the surface, and the other layer is a highly conductive layer. non-crystalline alloy matrix. The oxygen evolution catalytic material is directly formed with an amorphous-nanocrystalline composite structure (Tm a N m b ) x R m y The alloy is a precursor, where Tm is one or more of Fe, Ni, Co, Nm is one or more of P, C, Si, B, Rm is noble metal Ru, Rh, Os, Ir , one or more of Pt, Pd, Ag, Au. The method of the invention realizes the integrated preparation of the catalyst and the conductive carrier, and the obtained catalytic material can be directly used as an anode for water electrolysis, and has excellent catalytic performance for oxygen evolution. The preparation method of the invention is convenient, the process is simple and easy to control, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a catalytic material, more particularly, belongs to the technical field of oxygen evolution electrocatalysis, in particular to an integrated transition metal system oxygen evolution catalytic material and a preparation method. Background technique [0002] The oxygen evolution reaction is one of the most common electrochemical reactions in the electrochemical industry. In research and actual production, for the anode oxygen evolution reaction of water electrolysis, it is always hoped that the anode potential should be as low as possible under a certain current density, that is, the anode oxygen evolution material is required to have as high an oxygen evolution electrocatalytic activity as possible. Under certain electrolysis conditions, the difficulty of the oxygen evolution reaction mainly depends on the selection of the anode material (electrocatalyst). [0003] The research on traditional oxygen evolution catalytic material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/046C25B11/089C22C45/02C22C45/04C25F1/04
CPCC25B1/04C22C45/008C22C45/02C22C45/04C22C33/003C25F1/04C25B11/061C25B11/091C22C1/11Y02E60/36
Inventor 张涛席果果
Owner BEIHANG UNIV
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