Sn and N co-doped porous carbon catalyst electrochemically reduce CO2 into tunable syngas

Abstract Electrocatalytic CO2 reduction into syngas (CO and H2 mixture) is one of the most sustainable strategies for recycling CO2 into value-added products. In this study, a non-noble Sn, N co-doped porous carbon (Sn-NC) catalysts were prepared. The results show that the products of CO2 electroreduction on as-obtained Sn-NC catalysts are CO and H2, which would be a cheap, stable and efficient syngas production route. Notably, as-prepared Sn-NC exhibits a good activity at -0.6 V, with FECO of 63 % and FEH2 of 37 %. By adjusting the reduction potentials, the H2 / CO ratio of the generated syngas can be adjusted from 8.15 to 0.60. This work would be a good reference for production of tunable syngas from CO2 via low-cost catalysts.