Preparation method of oxygen evolution reaction catalyst

Abstract

The invention belongs to the field of electrochemical catalysis, and specifically relates to a preparation method of an oxygen evolution reaction catalyst. The method comprises the following steps: S1, dispersing a compound containing more than two transition metals in an aqueous solution; S2, adding a peroxide; S3, performing heating treatment; and S4, cooling the heated mixture, and performing centrifugation or filtering separation to obtain a solid, which is the oxygen evolution reaction catalyst having high activity. According to the method, a transition metal compound undergoes surface modification through a chemical oxidation manner, so that more active sites are produced on the surface of the transition metal compound, and the catalytic activity of the oxygen evolution reaction is improved. Compared with an electrochemical oxidation method which is mostly adopted at present, chemical oxidation is convenient to operate, and massive application and regulation of surface sites of a material are easy to realize. The preparation method is high in efficiency, quality and purity, low in cost, and convenient to control, and is non-toxic. The preparation method is particularly suitable for application to massive production.

Description

technical field [0001] The invention belongs to the field of electrochemical catalysis, and more specifically relates to a preparation method of an oxygen evolution reaction catalyst. Background technique [0002] Oxygen evolution reaction (2H 2 O→4H + +4e+O 2 ) as a half-reaction coupled with hydrogen evolution reaction, carbon dioxide reduction reaction, etc., is of great significance in the acquisition of clean hydrogen energy, the fixation and reuse of carbon dioxide, and is an important research topic in the field of clean energy research today. However, the oxygen evolution reaction usually proceeds slowly at the electrode interface. To convert water into oxygen cheaply and efficiently, a catalyst is necessary. A series of compounds such as oxides, sulfides, phosphides, and selenides of transition metals are currently widely studied catalysts for oxygen evolution reactions. A lot of work has been done on this series of materials, but these materials still have high...

AI Technical Summary

Problems solved by technology

A series of compounds such as oxides, sulfides, phosphides, and selenides of transition metals are currently widely studied catalysts for oxygen evolution reactions. A lot of work has been done on this series of materials, but these materials still have high reaction overpotentials. A series of problems such as low catalytic efficiency need to be improved urgently

Studies in recent years have shown that transition metal oxides are likely to be the active sites for transition metal-related materials to catalyze oxygen evolution reactions. Therefore, electrochemical oxidation of transition metal materials by applying potential or current has become a method to improve the oxygen evolution of transition metal materials. The method of reaction catalytic behavior, but research shows that this method has poor controllability and is difficult to achieve large-scale preparation

[0003] Generally speaking, all kinds of catalysts in the prior art cannot achieve the ideal catalytic effect. Correspondingly, there is an urgent need to find a more complete solution in this field in order to meet the needs of speeding up the oxygen evolution reaction.

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