Fig. 3: Areas trend data comparing gas phase and surface species in relevant core levels and across delay time in the CO oxidation of Pt(111) when pulsing CO at 10 Hz into a stream of O2 gas. | Nature Communications

Fig. 3: Areas trend data comparing gas phase and surface species in relevant core levels and across delay time in the CO oxidation of Pt(111) when pulsing CO at 10 Hz into a stream of O2 gas.

From: Resolving active species during the carbon monoxide oxidation over Pt(111) on the microsecond timescale

Fig. 3

The analysis includes gas phase species determined from (a) O 1s core level, surface species as determined from (b) C 1s, (c) O 1s, and (d) Pt 4f7/2 spectra. c O 1s contains a red dashed box on the falling edge detailing a significant finding in the difference between chemisorbed oxygen (blue) and Pt surface oxide (pink) contributions. To effectively observe the evolution of all species throughout the reaction, different averaging of the spectra was required in each pulsing region as denoted at the top with or without a running average (§). Consequently, the noise level changes across pulsing regions. Physical breaks between pulsing regions are employed to help distinguish different regions. Particularly meaningful slices of time in each pulsing region are conveyed by guide lines with associated roman numerals (I–IV) whose fits can be found in the bottom panel of Fig. 2.

Back to article page