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The effects of Cs or Ba promoters on the global and intrinsic turnover frequency of ammonia synthesis over ruthenium supported on carbon (9.1 wt% Ru) were examined at 3 atm and stoichiometric conditions by steady state and isotopic transient measurements at 573 K. Although the global turnover frequency based on total surface Ru atoms was nearly independent of promoter, Cs was more effective than Ba...
The effect of barium and cesium on the kinetic behavior of Ru/MgO in ammonia synthesis was studied. The activity measurements were performed in a differential reactor at 400°C under a pressure of 6.3 MPa and supplemented with chemisorption measurements and temperature-programmed surface reaction experiments (TPSR). The latter were performed by titrating preadsorbed atomic nitrogen (N ads )...
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