Table 2. Atomic Percentages Calculated from the XPS Spectra of the Catalysts.
| sample | element | peak (eV) | atomic (%) |
|---|---|---|---|
| CuOx/rGOc | C 1s | 284.9 | 80.9 |
| O 1s | 532.0 | 17.3 | |
| Cu 2p | 934.0 | 1.8 | |
| CuOx-PdOy/rGOc | C 1s | 284.9 | 79.9 |
| O 1s | 532.0 | 17.9 | |
| Cu 2p | 934.0 | 1.7 | |
| Pd 3d | 336.7 | 0.5 |