fig3
Figure 3. (A) H2-TPD profiles of used Ru/CaH2, Ru/BaH2, and Ru/BaO-CaH2, which were performed under Ar flow (1 °C·min-1). The three catalysts were used in the NH3 synthesis reaction at 340 °C for 50 h; (B) Schematic diagram of the Ru/BaO-CaH2 catalyzed NH3 reaction. Reproduced from Ref[32]. Copyright (2018), with permission from American Chemical Society; (C) Reaction path with minimum energy for absorbed CO* hydrogenation to CH4. Reproduced from Ref[34]. Copyright (2021), with permission from Elsevier. TPD: Temperature-programmed desorption.
