This series aims to give basic and essential knowledge necessary for well understand and master all the scientific and technological aspects of the electrochemical promotion of catalysis. The idea is to induce high-top level young researchers in this field and to generate a strong and unified European community. The EPOC field requires a multidisciplinary approach as it necessitates skills in catalysis, solid state electrochemistry, physical chemistry, environmental chemistry, surface science and material science. The series of 4 schools will give to the young participants all these skill over a period of 3 years (one training course per year). This duration was selected because it is particularly adapted to PhD students. This fourth school aims to give an overview on the recent developments in EPOC as well as preparation and characterization techniques to be used in EPOC, economy and process engineering.