Fig. 4: Isotopic labeling studies and SSITKA of CO oxidation.
From: Molecular-level insights into the electronic effects in platinum-catalyzed carbon monoxide oxidation

a Mass spectrometry (MS) data collected for the Pt/CNT-600 catalyst during the switch from Ar to Ar+C16O + 16O2 (the purity is >99.99%), Ar+C16O + 16O2 (50%)/18O2 (50%), and Ar+C16O + 18O2 (the concentration of 18O2 is > 97%) at an ambient pressure. b The relationship between logarithm of frequency factor (lnAi) and activation energy (Ea). The Ea (c), r100’ (d), site coverages of CO (θCO) and oxygen (θoxygen) (e), logarithm of frequency factor (lnA0’) (f), as well as the experimental and predicted TOFʹ (g) as a function of Pt charge for Pt/CNT-0, Pt/CNT-200, Pt/CNT-400, Pt/CNT-600, Pt/CNT-800, and Pt/CNT-1000. Reaction conditions: 100 °C, PCO:PO2:PAr = 1:20:79, and 60,000 mL∙gcat−1 ∙ h−1. Error bars in b and c were calculated from the standard error of each linear fit presented in Supplementary Fig. 26.