Continuous electroconversion of CO2 into formate using 2 nm tin oxide nanoparticles

• Synthesis of high surface area SnO 2 NPs as electrocatalyst for continuous production formate from CO RR. First evaluation nm performance RR in a flow electrolyzer. A maximum [formate] 27 g L ?1 was achieved with FE 44.9 % at 300 mA cm -2 . provokes significant migration current. Tin oxide nanoparticles (SnO NPs) the reduction reaction (CO RR). We synthesize, characterize and evaluate (2.4 299 m diameter size area, respectively), current density within under Ar conditions were studied by cyclic voltammetry. -based gas diffusion electrodes -GDEs) manufactured to perform concentration value Faradaic efficiency (FE) , which significantly stable reproducible when operated up 10 h. Nevertheless, ohmic drop contribution due semiconducting properties not negligible. The low total (< 60 %) products pointed out leakage crossover through membrane catholyte towards anolyte.