Improved ammonia synthesis activity of Ce doped barium tantalate supported Ru catalysts

The specific surface area and reducibility of the support could be increased by Ce doping into barium tantalite (BTO), which was beneficial to catalyze the synthesis of ammonia. The highest ammonia synthesis rate of Ru/2Ce/BTO and 3Cs–Ru/2Ce/BTO catalysts was 1670 and 4254 μmol gcat−1 h−1 at 350 °C under 0.1 MPa, and was increased to 5531 μmol gcat−1 h−1 for the 3Cs–Ru/2Ce/BTO catalyst at 375 °C under 0.1 MPa.