A method for improving the oxygen evolution performance of carbon cloth

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,...

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

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