Abstract: An electrodes/electrolyte assembly and a method for the direct amination of hydrocarbons, and a method for the preparation of said electrodes/electrolyte assembly is disclosed. The presented Solution allows the increase of conversion of said amination to above 60%, even at low temperatures. The electrodes/electrolyte assembly for direct amination of hydrocarbons has: an anode, electrons and protons conductor, that includes a composite porous matrix, containing a ceramic fraction and a catalyst for the amination at temperatures lower than 450° C.; a porous cathode, electrons and protons conductor, and electrocatalyst; an electrolyte, protons or ions conductor and electrically insulating, located between the anode and the cathode, made of a composite ceramic impermeable to reagents and products of the amination.