An electrocatalytic device comprising an electrolytic cell divided into anode and cathode chambers by an exchange membrane, said anode and cathode chambers being provided with electrodes, wherein one or both of said electrodes (a) is/are immersed in electrolytic suspensions, said electrolytic suspensions comprising surface-charged catalytic particles capable of forming, by electrostatic forces, self-assembling and self-healing films on the electrodes, and capable of forming suspensions, said suspensions being suitable of being pumped through the electrolytic cell, and/or (b) has/have self-assembling and self-healing films formed thereon, by electrostatic forces, from electrolytic suspensions comprising surface-charged catalytic particles, wherein (i) negatively surface-charged particles of said electrolytic suspensions are capable of being immobilized and forming a film on the surface of the positively charged electrode, such as an electrolyser anode, and/or the positively charged electrode, such as an electrolyser anode, has self-healing films formed thereon from negatively surface-charged particles of said electrolytic suspensions; and/or (ii) positively surface-charged particles of said electrolytic suspensions are capable of being immobilized and forming a film on the surface of the negatively charged electrode, such as an electrolyser cathode, and/or the negatively charged electrode, such as an electrolyser cathode, has self-healing films formed thereon from positively surface-charged particles of said electrolytic suspensions. (a) is/are immersed in electrolytic suspensions, said electrolytic suspensions comprising surface-charged catalytic particles capable of forming, by electrostatic forces, self-assembling and self-healing films on the electrodes, and capable of forming suspensions, said suspensions being suitable of being pumped through the electrolytic cell, and/or (b) has/have self-assembling and self-healing films formed thereon, by electrostatic forces, from electrolytic suspensions comprising surface-charged catalytic particles, wherein (i) negatively surface-charged particles of said electrolytic suspensions are capable of being immobilized and forming a film on the surface of the positively charged electrode, such as an electrolyser anode, and/or the positively charged electrode, such as an electrolyser anode, has self-healing films formed thereon from negatively surface-charged particles of said electrolytic suspensions; and/or (ii) positively surface-charged particles of said electrolytic suspensions are capable of being immobilized and forming a film on the surface of the negatively charged electrode, such as an electrolyser cathode, and/or the negatively charged electrode, such as an electrolyser cathode, has self-healing films formed thereon from positively surface-charged particles of said electrolytic suspensions. (i) negatively surface-charged particles of said electrolytic suspensions are capable of being immobilized and forming a film on the surface of the positively charged electrode, such as an electrolyser anode, and/or the positively charged electrode, such as an electrolyser anode, has self-healing films formed thereon from negatively surface-charged particles of said electrolytic suspensions; and/or (ii) positively surface-charged particles of said electrolytic suspensions are capable of being immobilized and forming a film on the surface of the negatively charged electrode, such as an electrolyser cathode, and/or the negatively charged electrode, such as an electrolyser cathode, has self-healing films formed thereon from positively surface-charged particles of said electrolytic suspensions.