How to Tune the Selectivity of Nitrogen-Doped Mesoporous Carbon Catalysts for Electrochemical Reduction of CO2
Nitrogen-doped carbon catalysts have been extensively investigated as cost-effective alternatives for CO2 reduction reaction (CO2RR) due to their apparent benefits such as high surface area, high material conductivity and opportunity for tuning dopant concentration. As reported in ACS Energy Letters, we first prepared N-doped mesoporous carbon materials (NMC), and through precisely controlling the annealing treatments, catalyst with tunable amounts of N species and defects can be produced and its roles in catalyzing CO2RR reaction studied. A thorough investigation also revealed that the role of defect sites as the main active sites for CO2RR in NMC catalyst and through multiple annealing treatments at 900 °C, the metal-free NRMC catalyst can exhibit metal-like activity toward CO2RR, with a FECO of 80% and a jCO of −2.9 mA cm–2 at a very low applied overpotential of 490 mV.
Read full article at ACS Energy Letters, 2018, 3(9), 2292 - 2298 (doi: 10.1021/acsenergylett.8b01409)