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Nickel-doped iron-based bimetallic non-noble metal catalyst and preparation method thereof

A non-precious metal and catalyst technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problem of high overpotential of non-precious metal catalysts, and achieve the effects of low cost, excellent oxygen evolution performance and simple operation.

Inactive Publication Date: 2021-07-20
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a nickel-doped iron-based bimetallic non-noble metal catalyst to solve the problem of high overpotential of the non-noble metal catalyst for oxygen evolution reaction in the existing technology
[0004] Another object of the present invention is to provide a method for preparing a nickel-doped iron-based bimetallic non-noble metal catalyst, which also solves the problem of high overpotential of the non-noble metal catalyst for the oxygen evolution reaction in the prior art

Method used

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  • Nickel-doped iron-based bimetallic non-noble metal catalyst and preparation method thereof
  • Nickel-doped iron-based bimetallic non-noble metal catalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] Step 1. After mixing 250mg of SBA-15, 500mg of sucrose and 1000mg of melamine, carbonize with 580μL of concentrated sulfuric acid, then put it into a drying oven at 100°C, dry for 4-8 hours, and then dry at 160°C for 5-10 hours to obtain a carbonized masterbatch ;

[0034] Step 2. Add 500mg sucrose and 1000mg melamine to the carbonized masterbatch obtained in step 1 and stir evenly, then add 1mL 1M ferric chloride hexahydrate and 1mL 1M nickel chloride hexahydrate and mix, then carbonize with 600 μL concentrated sulfuric acid again, and stir evenly Put it into the drying oven, firstly dry at 100°C for 6 hours, and then dry at 160°C for 6 hours to obtain carbonized sub-materials;

[0035] Step 3. Put the carbonized sub-material into a magnetic boat after being ground, and under the protection of nitrogen, first sinter at a temperature of 300°C for 1 hour, then raise the temperature to 900°C and sinter for 1 hour to obtain a catalyst base material;

[0036] Step 4, pickl...

Embodiment 2

[0043] Step 1. After mixing 250mg of SBA-15, 1000mg of sucrose and 1000mg of melamine, carbonize with 650μL of concentrated sulfuric acid, then put it into a drying oven at 150°C for 7 hours, and then dry at 200°C for 5 hours to obtain a carbonized masterbatch;

[0044]Step 2. Add 1000mg sucrose and 1000mg melamine to the carbonized masterbatch obtained in step 1 and stir evenly, then add 0.5mL 1M ferric chloride hexahydrate and 1mL 1M nickel chloride hexahydrate to mix, then carbonize with 700 μL concentrated sulfuric acid again, and stir evenly Then put it into the drying oven, firstly dry at 150°C for 7 hours, and then dry at 200°C for 5 hours to obtain carbonized sub-materials;

[0045] Step 3. Put the carbonized sub-material into a magnetic boat after being ground, and under the protection of nitrogen, first sinter at a temperature of 250°C for 1.5h, then raise the temperature to 950°C and sinter for 1.5h to obtain a catalyst base material;

[0046] Step 4, pickling the c...

Embodiment 3

[0048] Step 1. After mixing 250mg of SBA-15, 1000mg of sucrose and 1000mg of melamine, carbonize with 500μL of concentrated sulfuric acid, then put it into a drying oven at 1 before 100°C, dry for 4h, and then dry at 100°C for 5h to obtain a carbonized masterbatch;

[0049] Step 2. Add 1000mg sucrose and 1000mg melamine to the carbonized masterbatch obtained in step 1, stir evenly, add 0.5mL 1M ferric chloride hexahydrate and 1mL 1M nickel chloride hexahydrate, mix, carbonize again with 540 μL concentrated sulfuric acid, stir evenly Then put it into the drying oven, firstly dry at 100°C for 4 hours, and then dry at 100°C for 5 hours to obtain carbonized sub-materials;

[0050] Step 3. Put the carbonized sub-material into a magnetic boat after being ground, and under the protection of nitrogen, first sinter at a temperature of 200°C for 1 hour, then raise the temperature to 700°C and sinter for 0.5h to obtain a catalyst base material;

[0051] Step 4, pickling the catalyst base...

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Abstract

The invention provides a nickel-doped iron-based bimetallic non-noble metal catalyst and a preparation method thereof. According to the non-noble metal-based catalyst, SBA-15 is used as a hard template, sucrose is used as a carbon source, melamine is used as a nitrogen source, ferric chloride hexahydrate is used as an iron source, and nickel chloride hexahydrate is used as a nickel source, and then high-temperature carbonization treatment is performed to obtain the FeNi / N-C catalyst. Compared with single-metal Fe-N / C and Ni-N / C materials, the bimetallic FeNi-N / C material prepared by the preparation method disclosed by the invention plays a synergistic role between iron and nickel bimetals and between the iron and nickel bimetals and a defective carbon material, so that a nickel-doped iron-based bimetallic catalyst has high oxygen evolution performance and even exceeds a commercial RuO2 catalyst. The electrocatalyst has the characteristics of low cost and high performance, which greatly promotes the commercialization process of an electrolytic hydrogen production system.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a nickel-doped iron-based bimetallic non-noble metal catalyst and a preparation method of the catalyst. Background technique [0002] In order to solve the consumption of fossil fuels and environmental problems, there is an urgent need to develop sustainable energy conversion and storage systems, such as reversible fuel cells, rechargeable metal-air batteries, and electrolyzed water hydrogen production devices, etc. However, these energy conversion and storage systems are limited The constraints of the kinetically slow oxygen evolution reaction (OER) require efficient and stable catalysts to accelerate the reaction. At present, the industry is highly dependent on the noble metal oxide RuO 2 and IrO 2 catalyst, but its high price and poor stability have seriously hindered its large-scale commercialization. Therefore, this has spurred a large amount of research work devoted ...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/091
CPCC25B1/04Y02E60/36
Inventor 杨慧娟张钰琳王盛宝严成易小宇郭智文李倩
Owner XIAN UNIV OF TECH
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