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Fig. 5


RAIR difference spectra of the CH4 + H + O2 reaction (exp. 2.0). The 1001 cm−1 feature blueshifts between 125 K and 145 K, and could be due to CH3OH segregating in a H2O–ice environment(Martín-Doménech et al. 2014), and disappears upon further heating to 155 K.

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