Figure 14.

Development of ammonia production during continuous mechanocatalysis with 4.0 g of the catalyst. The experiments were performed using a shaker mill at a frequency of 25 Hz and with two 15 mm steel balls. The temperature was kept at 20 °C by external cooling. The jar was fed with 20 mL min⁻¹ (STP) of an H₂/N₂ (3 : 1) mixture at 20 bar. Due to safety reasons, the milling process had to be paused every day, which is the reason for the sharp spikes. Reproduced with permission from Ref. [130]. Copyright 2021, Wiley‐VCH.