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 mu mol g(cat)(-1) h(-1) at 350 degrees C under 0.1 MPa, and was increased to 5531 mu mol g(cat)(-1) h(-1) for the 3Cs-Ru/2Ce/BTO catalyst at 375 degrees C under 0.1 MPa.

Automated summary

Cerium doping into barium tantalite can increase the specific surface area and reducibility of the support, thus benefiting the catalysis of ammonia synthesis. The highest ammonia synthesis rates were achieved by Ru/2Ce/BTO and 3Cs-Ru/2Ce/BTO catalysts at 350 degrees C under 0.1 MPa, with further improvement seen at 375 degrees C specifically for the 3Cs-Ru/2Ce/BTO catalyst.