Fig. 4: IMs investigations during C2H4 removal.
From: Selective formation of acetate intermediate prolongs robust ethylene removal at 0 °C for 15 days
a Schematic diagram of the DRIFT spectroscopy measurement. b DRIFT spectra of C2H4 oxidation over Au54Pt46/ZHM20 at 0 °C. The sample was pretreated under N2 flow (50 mL min−1) at 250 °C for 1 h. After cooling to 0 °C, the background spectrum was taken under N2 flow. Then a mixture of C2H4 (25 mL min−1), O2 (20 mL min−1), and N2 (55 mL min−1) was flowed for 30 min, and the flow of C2H4 was stopped while keeping the flow of O2 and N2 for 5 min. c TPD profile of acetic acid of the used Au54Pt46/ZHM20. Reaction conditions: C2H4 oxidation was carried out on Au54Pt46/ZHM20 (0.2 g) at 0 °C for 10 h (81% conversion), and then the used Au54Pt46/ZHM20 (0.1 g) was transferred to measure TPD under He flow (30 mL min−1) from 25 °C to 500 °C at a ramp rate of 5 °C min−1. During the desorption, the mass signals of possible products were recorded. Units arbitrary units.
