Table 3 XPS surface chemical composition of SiliaCat Au before and after calcination. Elemental concentration is expressed as % atomic percentage
From: Sol–gel encapsulation of Au nanoparticles in hybrid silica improves gold oxidation catalysis
Sample | C 1 s (%) | O 1 s (%) | Si 2p (%) | Au 4f7/2 | Si/O | Si/C |
|---|---|---|---|---|---|---|
SiliaCatAu | 14.6 | 61.3 | 24.1 | 0.1 | 0.39 | 1.65 |
Calcined SiliaCatAu | 12.0 | 61.8 | 26.2 | 0.1 | 0.42 | 2.18 |