Preparation method of Ag-coated CoMoO4 oxygen evolution electrocatalyst

Abstract

The invention relates to the technical field of water electrolysis catalytic materials, in particular to a preparation method of an Ag-coated CoMoO4 oxygen evolution electrocatalyst. Comprising the following steps: (1) mixing polyvinylpyrrolidone with 1, 2-propylene glycol, stirring at a certain temperature, and then adding a sodium chloride solution and a silver nitrate solution with a certain concentration to prepare a silver nanowire solution; (2) purifying the silver nanowires with acetone and washing the silver nanowires for several times for later use; (3) weighing 2-methylimidazole, adding 2-methylimidazole into a mixed solution of different amounts of silver nanowires and methanol, adding a methanol solution of cobalt nitrate hexahydrate, dissolving the mixed solution in ethanol, and stirring at normal temperature; (4) adding sodium molybdate nonahydrate into the product obtained in the step (3), and carrying out hydrothermal reaction; after naturally cooling to room temperature, centrifugally collecting, washing with ethanol for multiple times, and drying to obtain the catalyst; the production cost is low, large-scale production is easy to achieve, the microstructure and good catalytic activity can be kept for a long time under the alkaline condition, and potential industrial application value is achieved in the aspect of electro-catalytic hydrogen production.

Description

technical field [0001] The invention relates to the technical field of electrolytic water catalytic materials, in particular to a preparation method of an Ag@CoMoO4 oxygen evolution electrocatalyst. Background technique [0002] The increasingly severe energy crisis and environmental pollution caused by fossil fuels have become two major obstacles to the sustainable development of human society. The development and storage of renewable energy has attracted widespread attention from domestic and foreign researchers. The electrochemical process can realize the mutual conversion of electrical energy and chemical energy stored in chemical bonds, which can be used to solve the following key problems involved in the process of energy storage and conversion: First, electrochemical energy conversion into charged interfaces reaction, so the conversion rate of the electrochemical cell is theoretically much higher than the traditional thermal efficiency; second, the electrochemical sys...

AI Technical Summary

Problems solved by technology

In recent years, transition metal-based nanomaterials based on iron, cobalt, nickel, copper, molybdenum, and manganese have shown excellent electrochemical activity, but due to their poor durability in catalyzing the oxygen evolution reaction, especially in strong alkali Therefore, the development of efficient alkaline oxygen-producing electrocatalysts has become the top priority of current research.

Images