2.2. Methane oxidation experiments
Details of methane oxidation reaction experiments are described in
Section S1.4 of the SI. Briefly, pretreated MIL-100 samples (423 – 523
K, 12 h, He flow (50 mL min-1) or vacuum (P
< 1 x 10-4 bar)) were exposed to
CH4/N2O reactant mixtures at 423 – 473
K with gas-phase product and reactant concentrations determined using a
gas chromatograph (Agilent 7890 B). Following reaction, water vapor at
various partial pressures (0.35 – 1.1 kPa) and molar flow rates (1.54 -
4.61 x 10-6 mol s-1) were introduced
to extract surface-bound intermediates at temperatures between 373 and
473 K, and products formed were measured using an online mass
spectrometer (MKS Cirrus 2).