The PLASINTER project main objective is to expand the knowledge on catalysts behavior, both in structure and chemical nature, under non-thermal plasma CO2 hydrogenation. There is consensus, in the plasma community, that upgrading of this process can be achieved by untangling plasma-chemical processes. The design of catalysts specifically tailored for activation by plasma combined to in-situ / operando characterization with the support of modelling / simulation would yield in-depth information on the underlying processes and allow the development of optimum catalytic phases and supports. This fundamental project aims at understanding how the micro-meso porosity of monolithic channels modifies the plasma discharge propagation, thus activation barrier on the catalyst and subsequent CO2 activation. The analysis of the catalyst surface and gas phase by in-situ infrared probing techniques will be performed in order to establish the properties of atmospheric pressure plasma developing within the monoliths and identify the plasma chemistry induced on surfaces. The design of well-defined catalysts with controlled-structure will help to link the effects of the monolith’s micro-channels on the hydrogenation reaction. Ni or Cu supported mesoporous alumina and silica will be synthesized and effects of promoters on catalyst physico-chemical properties evaluated. The investigation by in-situ combined to ex-situ experimentations will provide key knowledge on catalyst design and reaction mechanisms under plasma conditions.