Fig. 2: Time series of temperature protocol and products during the OSEM experiment.
From: Decoding technical multi-promoted ammonia synthesis catalysts
The time series shows the heating protocol and the ion currents of NH, NH2, NH3, and H2O (normalized to Ar) with major contributions at m/z = 15, 16, 17, and 18, respectively. The ionic currents at m/z = 15, 16, and 17 were multiplied by 500, 100, and 10, respectively. The pink region marks the onset of the catalytic activation with simultaneous catalyst reduction. The blue region marks the phase transformation of the surface into a disordered material. Conditions of acquisition: 22 Pa, H2:N2:Ar = 3:1:0.1. Heating ramp: 12 Kh−1.
