Fig. 4: Reduction and de-wetting of CoO by reaction with CO gas.
From: Elucidating the active phases of CoOx films on Au(111) in the CO oxidation reaction
Reduction and de-wetting of CoO/Au by reaction with CO: (a–c) Co 2p, C 1 s, O 1 s, and Au 4f XP spectra of 1 MLE of CoO on Au. From bottom: in UHV (black), and under 100 mTorr CO after heating to the temperatures indicated. The decrease in the intensity of the Co and O peaks above 300 °C is related to reduction, clustering, and dewetting of the unstable carbonate covered CoO, as shown by the rapid increase of the Au 4 f peak shown in d. Inset: graphic illustration of the dewetting process. The XPS data were acquired at beamline 9.3.2 of ALS.
