Fig. 4: Surface chemistry investigations.
From: Selective oxidation of methane to C2+ products over Au-CeO2 by photon-phonon co-driven catalysis
a EPR spectra of CeO2 and Au-CeO2-300 for O2- trapping; b Transient photocurrent response of CeO2 and Au-CeO2-300 at the bias potential of 0.3 V vs. Ag/AgCl; Evolution of (c) HCOO· species and (d) CO2 during the in situ DRIFTS measurement of CeO2 and Au-CeO2-300 (methane to air = 200:1).
