A Cu exsolution based composite anode (R-LSFCNb) was prepared through reducing perovskite La0.5Sr0.5Fe0.8Cu0.15Nb0.05O3-8 (LSFCNb) in H(2 )for intermediate temperature solid oxide fuel cells (IT-SOFC). The performance and stability of the anode in various fuels, as well as the regeneration possibility from coking in syngas were investigated. The anode showed highly catalytic activity to fuel oxidations by peak power density of 0.76, 0.64, and 0.71 W . cm(-2) in wet H-2 (3% H2O), wet syngas (H-2 :CO = 1, 3% H2O), and H(2 )with 50 ppm H2S, respectively, at 800 degrees C in electrolyte supported full cells. Moreover, the anode was highly stable in wet H-2, and exhibited H2S and coking resistance during 100 h testing period under 0.7 V. In addition, the anode can be regenerated from carbon deposition in wet syngas through applying reodx cycles on it, the evolution and elimination of carbon deposition in the anode were studied and discussed. (C) 2018 The Electrochemical Society.