Fig. 4
From: Subnanometer cobalt oxide clusters as selective low temperature oxidative dehydrogenation catalysts
In situ XANES spectra of Co4 clusters collected during the applied ramp. a spectra acquired under cyclohexane oxygen 1:10 ratio and b under and 10:1 ratio seeded in He; spectra collected at the indicated temperatures applied from the start (bottom) of the temperature ramp to its end (top). He denotes spectra collected under helium. c XANES spectra of bulk Co standards: Co foil (pink line), CoO (dark green line), Co(OH)2 (dark blue line), Co2O3 (light green line), Co3O4 (red line), CoAl2O3 (cyan line) and CoOOH (black line). (Spectrum of CoOOH adapted with permission from ref. 54, CopyRight (2018) of the American Chemical Society
