Non-thermal plasma synthesis of H$_{2}$O$_{2}$: investigation of DBD and surface-DBD performances

Authors focused on H$_{2}$O$_{2}$ non-thermal plasma synthesis. A H$_{2}$/ O$_{2}$ mixture is used as reactant gas flow. If the reaction is performed into a simple glass discharge tube selectivities regarding H$_{2}$O and H$_{2}$O$_{2}$ are respectively 98.5 and 1.5{\%}. In order to improve performances, materials were associated to the discharge. This aimed at using material surface properties to drive recombination of dissociated species toward targeted products. Four materials were tested: SiO$_{2}$ coating, TiO$_{2}$ coating, SiO$_{2}$ fibres, TiO$_{2}$ fibres. Regardless to their chemical nature, coatings do not induce any improvement. On the contrary, fibres multiplied by 20 the selectivity toward H$_{2}$O$_{2}$. The yield of H$_{2}$O$_{2}$ is multiplied by 35 with SiO$_{2}$ fibres and by 50 with TiO$_{2}$ fibres. Investigations have been performed in order to understand the interaction between the discharge and inorganic fibres. Authors propose a reaction scheme in order to summarize gaseous and adsorbed reactions.