Figure 2
(a) O 1s X-ray photoelectron spectrum of Pt(111) in 0.15 mbar O2 at 430 K. (b)–(f) O 1s X-ray photoelectron spectra of Pt(111) in a 0.15 mbar 9:1 O2:CO mixture when the crystal is heated from 450 to 535 K. (g) QMS signal from CO, O2 and CO2 acquired simultaneously with the XPS data. |