Fig. 2: Catalytic performance tests for ammonia decomposition.
From: Dispersed surface Ru ensembles on MgO(111) for catalytic ammonia decomposition
a NH3 conversion as a function of reaction temperature over different supported Ru samples, reaction conditions: weight hour space velocity (WHSV) = 30,000 mL gcat–1 h–1, 1 bar; b effect of WHSV on the NH3 conversion of Ru/MgO(111) at different temperatures; the error bars in the figure represents standard deviation through three repeated measurements; c reaction rate for ammonia decomposition over Ru-based catalysts with different MgO supports, reaction conditions: T = 400 °C, WHSV = 30,000 mL gcat–1 h–1, 1 bar; d Arrhenius plots of supported Ru samples; dependence of ammonia decomposition rate of supported Ru samples on the partial pressures of (e) H2 and (f) NH3 at 350 °C. α and γ represent the reaction order of NH3 and H2, respectively. g 2D contour maps of activity over the supported Ru samples with different (111), (110) and (100) formulations at 400, 350 and 300 °C, reaction conditions: WHSV = 30,000 mL gcat–1 h–1, 1 bar. The bottom scheme shows the illustration of reconstruction of MgO-cube to MgO-octahedron; h comparison of H2 formation rate over different exposed MgO facets based on the analysis of 2D contour maps; the metal loading was based on the ICP-OES results.
