A method for improving the oxygen evolution performance of carbon cloth

A technology of oxygen evolution and carbon cloth, which is applied in the field of electrocatalytic oxygen evolution, can solve the problem of high risk factor of experimental reagents, and achieve the effects of improving catalytic ability, reducing cost, and high oxygen evolution activity

Inactive Publication Date: 2019-06-18
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the equipment used in these reports is either special, or the risk factor of experimental reagents is relatively high

Method used

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  • A method for improving the oxygen evolution performance of carbon cloth
  • A method for improving the oxygen evolution performance of carbon cloth
  • A method for improving the oxygen evolution performance of carbon cloth

Examples

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Embodiment 1

[0038] A method for improving the oxygen evolution performance of carbon cloth in this embodiment includes the following steps:

[0039] (1) Add 363.8mg of vanadium pentoxide and 756.4mg of oxalic acid into 12ml deionized water respectively (the mass concentration of vanadium pentoxide in deionized water is 30.32mg / mL, the molar ratio of vanadium pentoxide to oxalic acid 1:3), in an oil bath at 75°C, the two are fully reacted to form a dark blue vanadyl oxalate solution;

[0040] (2) Cool the solution prepared in step (1) to room temperature, then add 3 mL of hydrogen peroxide (the volume ratio of hydrogen peroxide to deionized water is 1:4), and convert the dark blue vanadyl oxalate solution into brown vanadyl peroxide solution;

[0041] (3) Add 60mL of ethanol (the volume ratio of ethanol to the deionized water is 5:1) to the solution prepared in step (2), then transfer to the hydrothermal reaction kettle of 100mL (the total volume of ethanol and deionized water The volume...

Embodiment 2

[0049] A method for improving the oxygen evolution performance of carbon cloth in this embodiment includes the following steps:

[0050] (1) The oxalic acid of the vanadium pentoxide of 300mg and 623.7mg is added into 10ml deionized water respectively (the mass concentration of vanadium pentoxide in deionized water is 30mg / mL, the molar ratio of vanadium pentoxide and oxalic acid is 1 : 3), in the oil bath of 70 ℃, make both fully react and form dark blue vanadyl oxalate solution;

[0051] (2) Cool the solution prepared in step (1) to room temperature, then add 2.5 mL of hydrogen peroxide (the volume ratio of hydrogen peroxide to deionized water is 1:4), and convert the dark blue vanadyl oxalate solution into brown oxygen peroxide Vanadium solution;

[0052] (3) Add 60mL of ethanol (the volume ratio of ethanol to the deionized water is 6:1) to the solution prepared in step (2), then transfer to the hydrothermal reaction kettle of 100mL (the total volume of ethanol and deioniz...

Embodiment 3

[0056] A method for improving the oxygen evolution performance of carbon cloth in this embodiment includes the following steps:

[0057] (1) The oxalic acid of the vanadium pentoxide of 420mg and 873.2mg is added into 12ml deionized water respectively (the mass concentration of vanadium pentoxide in deionized water is 35mg / mL, the molar ratio of vanadium pentoxide and oxalic acid is 1 : 3), in the oil bath of 90 ℃, make both fully react and form dark blue vanadyl oxalate solution;

[0058] (2) Cool the solution prepared in step (1) to room temperature, then add 3 mL of hydrogen peroxide (the volume ratio of hydrogen peroxide to deionized water is 1:4), and convert the dark blue vanadyl oxalate solution into brown vanadyl peroxide solution;

[0059] (3) Add 60mL of ethanol (the volume ratio of ethanol to the deionized water is 5:1) to the solution prepared in step (2), then transfer to the hydrothermal reaction kettle of 100mL (the total volume of ethanol and deionized water ...

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Abstract

The invention discloses a method of enhancing oxygen separate-out performance of carbon cloth. The method comprises the following steps: (1) separately adding vanadium pentoxide and oxalic acid into deionized water to be fully reacted to form a deep blue vanadyl oxalate solution; (2) cooling the solution prepared in the step (1) to room temperature, and then adding hydrogen peroxide, wherein the deep blue vanadyl oxalate solution is converted into a brown vanadium peroxide solution; (3) adding ethanol into the vanadium peroxide solution prepared in the step (2), then transferring the solution to a hydrothermal reaction kettle, then adding clean carbon cloth into the hydrothermal reaction kettle for hydrothermal reaction to obtain carbon cloth loading vanadium dioxide; and (4) removing vanadium dioxide on the surface by means of a cyclic voltammetry method by taking a vanadium dioxide-carbon cloth composite material as a working electrode to prepare the activated carbon cloth. By taking the compound of vanadium as an oxidizing agent and introducing an oxygen-containing group to the surface of the carbon cloth, the catalytic oxygen separating ability of the carbon cloth in an alkaline solution is extremely enhanced.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic oxygen evolution, and more specifically relates to a method for improving the oxygen evolution performance of carbon cloth. Background technique [0002] Oxygen evolution reaction has attracted extensive attention due to its important role in many energy conversion and storage systems (such as electrolysis of water to produce hydrogen, metal-air batteries, etc.). However, the oxygen evolution reaction is a multi-electron transfer process with relatively slow kinetics, and often requires the help of catalysts to speed up the reaction rate. [0003] At present, it is generally believed that IrO 2 and RuO 2 It is the most active oxygen evolution reaction catalyst, but their high price and limited reserves limit their large-scale application in real life. Therefore, it is of great significance to develop highly active and inexpensive oxygen evolution reaction catalysts. [0004] Recently,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/10
CPCG01N31/10
Inventor 黄德康李淑罗艳珠陈浩
Owner HUAZHONG AGRI UNIV
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