Fig. 4: Evolution of Ag during in situ experimental conditions.
From: In situ identification of the metallic state of Ag nanoclusters in oxidative dispersion
NAP-XPS results of Ag 3d spectra (a) and Ag MNN Auger spectra (b) of Ag/Si3N4 under in situ experimental conditions. I: Ag/Si3N4; II: 1 mbar O2 at 700 K; III: UHV (1 × 10−6 mbar) at 700 K; IV: 1 mbar O2 at 700 K; V: cooling to 450 K in 1 mbar O2; VI: cooling to 300 K in 1 mbar O2. c Deduced Auger parameter and Ag/Si ratio from NAP-XPS data, and temperature profile for in situ experimental conditions. d The relative formation energy of Ag3 cluster and Ag8 cluster based on the Ag particle under considering different influencing factors.
