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Method for preparing oxygen evolution electrocatalyst by using N-doped carbon-based material

An electrocatalyst, carbon-based material technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve problems such as high energy consumption, and achieve long-term cycle stability, excellent performance, and good stability.

Active Publication Date: 2021-09-24
LANZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the experimental plan requires 180°C water heating for 6 hours and 900°C annealing for 3 hours, which consumes more energy.

Method used

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  • Method for preparing oxygen evolution electrocatalyst by using N-doped carbon-based material
  • Method for preparing oxygen evolution electrocatalyst by using N-doped carbon-based material
  • Method for preparing oxygen evolution electrocatalyst by using N-doped carbon-based material

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Experimental program
Comparison scheme
Effect test

Embodiment

[0036] 1. Experimental materials

[0037] Table 1 Chemical reagents and raw materials

[0038]

[0039] 2. Experimental equipment

[0040] Table 2 Main Experimental Instruments

[0041]

[0042] Table 3 main experimental instruments

[0043]

[0044] 3. Material preparation method

[0045]1. Preparation of prefabricated precursors: Weigh 10 mg of sodium citrate with a balance and put them into beakers A, B, and C, respectively add 25 mL of deionized water, stir magnetically until completely dissolved, weigh 2 mg of urea and add the dissolved lemon NaCl solution, magnetically stirred for 30 min. The above three samples were then quickly frozen with liquid nitrogen to prevent agglomeration. Transfer the frozen sample to a freeze dryer for 3 days to obtain the desired precursor.

[0046] 2. Preparation of annealed materials: transfer the samples to clean porcelain boats and spread them evenly, and place the porcelain boats in the center of the tube furnace. The tu...

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Abstract

The invention discloses a method for preparing an oxygen evolution electrocatalyst by using an N-doped carbon-based material, and relates to the fields of batteries, electrolyzed water and the like. The invention provides a preparation method of an N-doped carbon-based electrocatalyst taking cheap sodium citrate as a carbon source and urea as a nitrogen source. Compared with other non-metal catalysts, the prepared N-doped carbon-based electrocatalyst has the advantages of being simple in preparation process, excellent in OER performance, good in cycling stability and the like. The method is applied to the fields of batteries, electrolyzed water and the like.

Description

technical field [0001] The invention relates to the fields of batteries, electrolyzed water and the like, in particular to a method for preparing an N-doped carbon-based material used as an oxygen evolution electrocatalyst. Background technique [0002] Today, when traditional fossil energy cannot meet human needs, people urgently need new energy to replace non-renewable fossil energy. Electrocatalytic oxygen evolution reaction (OER) has become one of the research hotspots in renewable energy devices such as complete electrolysis of water and zinc-air batteries. However, OER is a reaction process involving many electrons, and its main problems are high overpotential, low efficiency, and short lifetime. Therefore, it is extremely important to develop electrocatalysts with high activity, long life and low cost. Although the precious metal RuO 2 and IrO 2 It has incomparable OER activity, but the high price and low reserves make their commercial application prospects slim. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/02C25B11/043C25B11/04
CPCC25B1/04C25B11/02C25B11/043C25B11/04Y02E60/36
Inventor 彭尚龙王志霞孙啸王蕊杨红岑刘振华贾大力陆念迪
Owner LANZHOU UNIVERSITY
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