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Method for preparing high-entropy alloy type electrocatalytic oxygen evolution reaction catalyst through high-energy ball milling

A technology of high-entropy alloy and oxygen evolution reaction, which is applied in the direction of electrodes, electrolytic components, electrolysis process, etc., can solve the problems of high cost and complex preparation method of electrocatalytic oxygen evolution reaction catalyst, and achieve low cost, excellent catalytic activity, and preparation The effect of simple process

Active Publication Date: 2019-08-02
HARBIN INST OF TECH
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Problems solved by technology

[0003] The present invention aims to solve the technical problems of complex and high-cost preparation methods of existing electrocatalytic oxygen evolution reaction catalysts, and provides a method for preparing high-entropy alloy type electrocatalytic oxygen evolution reaction catalysts by high-energy ball milling

Method used

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  • Method for preparing high-entropy alloy type electrocatalytic oxygen evolution reaction catalyst through high-energy ball milling
  • Method for preparing high-entropy alloy type electrocatalytic oxygen evolution reaction catalyst through high-energy ball milling
  • Method for preparing high-entropy alloy type electrocatalytic oxygen evolution reaction catalyst through high-energy ball milling

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specific Embodiment approach 1

[0018] Specific Embodiment 1: The method for preparing a high-entropy alloy type electrocatalytic oxygen evolution reaction catalyst by high-energy ball milling in this embodiment is carried out according to the following steps:

[0019] 1. Weigh the main transition metal powder, auxiliary transition metal powder and carbon nanotubes and mix them uniformly to obtain a mixed powder, wherein the main transition metal powder is a mixed powder of Fe, Co, Ni and Mn, wherein Fe, Co, Ni and Mn The molar ratio is 1: (0.9~1.1): (0.9~1.1): (0.9~1.1); the auxiliary transition metal powder is Cr powder or Sn powder; the molar ratio of Fe powder and auxiliary transition metal powder is 1: (0.9~ 1.1); the ratio of the total mass of the main transition metal powder and the auxiliary transition metal powder to the mass of the carbon nanotube is (8-9): 1;

[0020] 2. Add the mixture to the high-energy ball mill, and perform ball milling at a speed of 600-1000 rpm, and pause for 10-15 minutes e...

specific Embodiment approach 2

[0021] Embodiment 2: This embodiment differs from Embodiment 1 in that in step 2, the grinding balls made of zirconia are used as the ball milling medium during ball milling. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 2, the ball-to-material ratio during ball milling is (9-10):1. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a method for preparing a high-entropy alloy type electrocatalytic oxygen evolution reaction catalyst through high-energy ball milling and relates to a preparation method of an electrocatalytic oxygen evolution reaction catalyst. The invention aims to solve the technical problems that the conventional preparation method of the electrocatalytic oxygen evolution reaction catalyst is complex and high in cost. The method comprises the following steps: 1, weighing main body transition metal powder, auxiliary transition metal powder and carbon nanotubes and mixing uniformly toobtain mixed powder; 2, adding the mixture into a high-energy ball mill, performing ball milling at the rotating speed of 600 to 1000 rpm, pausing for 10 to 15 minutes when performing ball milling for10 to 15 minutes, and performing ball milling for totally 4 to 12 hours to obtain the high-entropy alloy type electrocatalytic oxygen evolution reaction catalyst. The overpotential of the high-entropy alloy type electrocatalytic oxygen evolution reaction catalyst is 264 to 277 mV, and the high-entropy alloy type electrocatalytic oxygen evolution reaction catalyst still can show up stable catalytic property after 12 hours.

Description

technical field [0001] The invention relates to a preparation method of an electrocatalytic oxygen evolution reaction catalyst. Background technique [0002] Hydrogen energy is an important clean energy that is expected to replace traditional fossil fuels in the future. The splitting reaction of water to produce hydrogen and oxygen is one of the important chemical processes of hydrogen energy. The anode reaction of electrocatalytic water splitting has a high overpotential and is also a process of high energy consumption, which is a huge obstacle to the improvement of energy storage and conversion efficiency such as electrocatalytic water splitting. The currently used oxygen evolution reaction catalysts are mainly noble metal-based oxides such as Pt, Ir, and Ru. The overpotential of the RuO2 catalyst is 279mV, and the stable active catalytic time is about 4 hours. This is widely considered to be an excellent oxygen evolution reaction catalyst. criteria for judging. However...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B11/04Y02E60/36
Inventor 李杨孔令臣卢松涛秦伟吴晓宏
Owner HARBIN INST OF TECH
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