гальванічне заміщення

The possibilities of the galvanic replacement method in the formation of a metallic nanostructured surface for electrocatalytic processes are revealed. Based on the electrochemical mechanism of the process and taking into account the type of substrate, the following directions of application of this method are presented: metal surface modification and synthesis of metallic nanostructures.

The controlled synthesis of parts of noble metals of a given morphology, shape, size and distribution on the floor emphasizes the important prerequisite for the creation of complex structures, for example nanowire, are one of the most promising materials for the creation of modern devices.

The electrochemical method of converting CO2 into valuable products is promising both in economic and technological aspects. However, recovery is a complex multi-stage and multi-factorial catalytic process. The nature of the surface of the cathode, its structure, composition of the electrolyte, regeneration regimes significantly affect the rate of conversion of CO2 and the selectivity of the products.

One of the promising methods of such a modification is a method of galvanic replacement, which is characterized by wide possibilities of controlled influence on the morphology of the deposited nanostructured metal. The deposition of silver by galvanic replacement is most studied in aqueous solutions of AgNO3 in the presence of HF. However, the hydrolysis of formed compounds of silicon, the change in pH, and the electrical renewal of hydrogen do not always provide a controlled formation of metal nanoparticles.