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Fig. 2

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QMS spectra of selected masses measured during a 5 K min−1 TPD after the co-deposition 2.0 ML of H2CO and 50 ML of H on top of porous amorphous water at 10 K (Exp. 1 in Table 1). The assignments of molecular species based on temperature and masses are marked in the figure. CH3OH is abbreviated to MeOH.

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