Preparation method for oxygen evolution electrode based on graphene oxide reduction

Abstract

The invention discloses a preparation method for an oxygen evolution electrode based on graphene oxide reduction. The method comprises the following steps: 1) oxidizing graphite power to prepare graphite oxide; 2) carrying out ultrasonic treatment on the graphite oxide prepared in the step 1) to prepare graphene oxide; 3) adding water to dilute the graphite oxide prepared in the step 2); 4) carrying out a hydrothermal reduction reaction on the diluted graphite oxide solution obtained in the step 3), thus obtaining a product, namely the oxygen evolution electrode based on graphene oxide reduction. The oxygen evolution electrode based on graphene oxide reduction prepared in the invention has excellent oxygen evolution catalytic performance and long-term stability, can replace expensive iridium and oxide electrode thereof, can be widely applied to the field of water and metal-air photolysis batteries and other energy conversion devices and the like, and has relatively high practical value. The common graphite power is adopted as a raw material in the invention, the raw material source is wide, the price is low, and the preparation method is simple and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method of an oxygen evolution electrode, in particular to a preparation method of an oxygen evolution electrode based on reduced graphene oxide. Background technique [0002] Oxygen evolution reaction is one of the most important electrocatalytic reactions, widely used in photolysis of water and metal-air batteries and other fields. Iridium and its oxide electrodes are the traditional and most commonly used electrodes for oxygen evolution reaction. However, as a noble metal, iridium is expensive, has limited resources, and suffers serious performance loss during long-term operation, which hinders photolysis of water and metal-air Commercial development in fields such as batteries. In view of serious shortcomings such as high price of iridium and its oxide electrodes, limited resources, and serious performance loss during long-term operation, research in recent years has found that certain transition metal element...

AI Technical Summary

Problems solved by technology

Iridium and its oxide electrodes are the traditional and most commonly used electrodes for oxygen evolution reaction. However, as a noble metal, iridium is expensive, has limited resources, and suffers serious performance loss during long-term operation, which hinders photolysis of water and metal-air Commercial development in fields such as batteries

In view of serious shortcomings such as high price of iridium and its oxide electrodes, limited resources, and serious performance loss during long-term operation, research in recent years has found that certain transition metal elements (such as cobalt and nickel) oxide materials exhibit certain oxygen evolution properties, However, the transition metal oxide oxygen precipitation overpotential is usually high, the effect is not ideal, and the steps are cumbersome, making it difficult to achieve large-scale production

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