Surface coverage of H₂CO (top panel) and CH₃OH (bottom panel) across four different surface temperatures: 9, 10, 11 and 12 K. Light blue and light orange bars represent experimental results of CO co-deposition with H (noted as {CO + H}) and with H and Ne (as {CO + H + Ne}) on a cASW substrate, respectively. Conversely, dark blue and dark orange bars correspond to the co-deposition on a gold (Au) substrate.