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Synthesis and application of nano carbon fiber electrocatalyst containing cobalt-molybdenum oxide

A nano-carbon fiber, electrochemical technology, applied in electrochemical generators, electrodes, circuits, etc., can solve the problems of high cost and high price, and achieve the effects of efficient production, cheap raw materials, and strong operability

Active Publication Date: 2018-10-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalysts are generally supported on conductive supports, such as carbon nanotubes, graphene, nickel foam, etc., but these supports are still expensive and costly. Therefore, the design cost is low, the preparation is simple, and HER can be synthesized on a large scale. Electrocatalysts become a research hotspot

Method used

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  • Synthesis and application of nano carbon fiber electrocatalyst containing cobalt-molybdenum oxide
  • Synthesis and application of nano carbon fiber electrocatalyst containing cobalt-molybdenum oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] a. Take 5mmol Co(OAc) 2 4H 2 O, 15ml of ethanol and 7mmol of Py were mixed and stirred until the solid was completely dissolved, stirred and added dropwise with 10mmol of CH 3 COOH and 10 mmol H 2 o 2 Mix the solution to obtain a brown solution, add 5ml of water to reflux at 80°C for 1 hour, cool to room temperature, add 20mL of 0.02g / mL sodium perchlorate aqueous solution, place it at 5°C for 48 hours, filter, wash with water, and dry to obtain a brown color Solid, i.e. nitrogen-containing cobalt compound;

[0020] b. Add 1 mmol H to 4 mmol nitrogen-containing cobalt compound in acetonitrile solution 3 PMo 12 o 40 The aqueous solution, the volume ratio of acetonitrile and water is 1:1, stirring and filtering and washing with water and acetonitrile obtains nitrogen-containing cobalt-phosphomolybdic acid ion crystal compound;

[0021] c. Dissolve 100 mg of the nitrogen-containing cobalt-phosphomolybdic acid ion crystal compound obtained in step b in 2 g of DMF, ad...

Embodiment 2

[0023] a. Take 5mmol Co(OAc) 2 4H 2 O and 20mL of ethanol were placed in a flask, and 5mmol of peracetic acid was added dropwise. Stir and observe that the color turns olive green, add 7mmol pyridine, reflux at 80°C for 1 hour, cool to room temperature, add 20mL 0.02g / mL sodium perchlorate solution, place at 5°C for 48 hours, filter, wash with water, and dry Obtain a brown solid that is a nitrogen-containing cobalt compound;

[0024] b. Add 1 mmol H to 4 mmol nitrogen-containing cobalt compound in acetonitrile solution 3 PMo 12 o 40 The aqueous solution, the volume ratio of acetonitrile and water is 1:1, stirring and filtering and washing with water and acetonitrile obtains nitrogen-containing cobalt-phosphomolybdic acid ion crystal compound;

[0025] c. Dissolve 100 mg of the nitrogen-containing cobalt-phosphomolybdic acid ion crystal compound obtained in step b in 2 g of DMF, add 200 mg of PAN, stir until the solution is homogeneous, and form nanofibers by electrospinni...

Embodiment 1

[0027] Weigh 5 mg of the catalyst in Example 1, add 2 mg of alkyne black, 50 μL of Nafion, disperse in 1 ml of ethanol, take 126 μL and add dropwise 1*1cm 2 carbon paper, at 0.5M H 2 SO 4 Tested in solution, the reference electrode is Ag / AgCl electrode.

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Abstract

The invention discloses synthesis and application of a nano carbon fiber electrocatalyst containing cobalt-molybdenum oxide. The synthesis is characterized in that a cobalt nitride-phosphomolybdenum polyacid ion crystal compound is firstly synthesized, is mixed with polymer polyacrylonitrile for electrostatic spinning, and is roasted to synthesize nano carbon fibers containing cobalt-molybdenum oxide. As an electrocatalyst, the nano carbon fiber electrocatalyst containing cobalt-molybdenum oxide has very catalytic activity, has catalytic activity under different acid and alkaline conditions, and can be used in hydrogen evolution and oxygen evolution fuel cells.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic composite materials, in particular to a nitrogen-cobalt-molybdenum-containing nano-carbon fiber electrochemical catalyst and its catalytic application in hydrogen and oxygen evolution fuel cells. Background technique [0002] With the increasing severity of the greenhouse effect, global warming and energy crisis, people's demand for sustainable energy and clean energy is increasing, and the development of a new type of clean energy has become a top priority. Nuclear energy, wind energy, and solar energy are limited in application because of their storage and transportation limitations. As a secondary energy source, hydrogen energy is considered to be the most potential energy carrier in the future due to its cleanliness, high efficiency, and ease of production, storage and transportation. At present, there are many methods for hydrogen production, such as methanol decomposition h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06H01M8/0606H01M8/0656
CPCC25B11/091H01M8/0606H01M8/0656Y02E60/50
Inventor 宋宇飞张文博陈伟
Owner BEIJING UNIV OF CHEM TECH
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