TPD-QMS profile for the m/z = 14 and 42. Black arrows correspond to features attributable to H₂CCO, obtained after the reaction of the pre-deposited CH₃CHO with H atoms on c-ASW at 10K. The desorption peaks at 100–130 K and 140–150 K are derived from the remaining CH₃CHO on c-ASW after exposure to H atoms. The peaks at 75–90 K and 150–165 K represent the desorption of H₂CCO (Maity et al. 2015; Chuang et al. 2020; Fedoseev et al. 2022).