Abstract
Converting CO2 to CO by electrochemical method is considered as an economic and friendly strategy to solve problems of resource and environment. In this work, precursor of niobium/carbon was prepared by wet chemical method and converted into Nb4N5/C and Nb2O5/C after calcination under NH3 and Ar respectively. When the nitriding temperature reaches to 700℃, prepared Nb4N5/C exhibits excellent catalytic activity with CO Faradaic efficiency of 57% at -0.83 V vs RHE in CO2 saturated 0.5 mol·L-1 NaCl solution. The results show that the catalytic activity of Nb4N5/C is related to the N doping in Nb4N5.
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