PIONEER is a European network aiming at educating a generation of experts in the multidisciplinary field of plasma/catalysis for CO2 conversion. 15 PhD students (also called ESR) will be working together, within a consortium of 15 academic partners and 6 industrial partners in 10 different countries, in order to conceive new systems of plasma/catalysis for an efficient conversion of CO2 molecule. This challenge will require to understand in details the role of surfaces in contact with molecular plasmas in order to invent and synthesize new materials having the required properties for taking advantage of the strong electric field and reactive species provided by the unique medium that are Non Thermal Plasmas.