Table 1. Summary of EXAFS curve fitting for Pd-based catalysts.
Sample | Edge | Shell | N | R (Å) | ΔE (eV) | σ 2 (Å2) | R-Factor |
Pd black | Pd K | Pd–Pd | 12 (fix) | 2.74 ± 0.00 | 0.0 ± 0.3 | 0.006 | 0.002 |
Pd/Al2O3 | Pd K | Pd–O | 0.7 ± 0.2 | 2.02 ± 0.02 | 6.4 ± 3.2 | 0.004 | 0.002 |
Pd–Pd | 7.1 ± 0.3 | 2.73 ± 0.00 | 0.0 ± 0.4 | 0.009 | |||
PdIn/Al2O3 | Pd K | Pd–In | 6.6 ± 0.3 | 2.73 ± 0.00 | 0.0 ± 0.3 | 0.012 | 0.012 |
In K | In–O | 2.5 ± 0.3 | 2.14 ± 0.01 | 2.3 ± 1.5 | 0.010 | 0.014 | |
In–Pd | 5.7 ± 0.6 | 2.74 ± 0.01 | 0.0 ± 0.7 | 0.014 | |||
Pd–In–Cu/Al2O3 | Pd K | Pd–Cu | 3.0 ± 0.3 | 2.60 ± 0.01 | 1.8 ± 1.6 | 0.006 | 0.002 |
(Pd : In : Cu = 3 : 1 : 2) | Pd–In | 5.8 ± 0.5 | 2.70 ± 0.01 | –1.3 ± 0.7 | 0.013 | ||
In K | In–O | 2.6 ± 0.3 | 2.13 ± 0.01 | 4.1 ± 1.5 | 0.010 | 0.010 | |
In–Pd | 5.8 ± 0.5 | 2.70 + 0.00 | 0.0 ± 0.6 | 0.010 | |||
Cu K | Cu–O | 1.0 ± 0.2 | 1.93 ± 0.02 | 5.8 ± 2.3 | 0.006 | 0.006 | |
Cu–Cu | 2.2 ± 1.6 | 2.58 ± 0.08 | –1.0 ± 9.5 | 0.013 | |||
Cu–Pd | 3.1 ± 0.9 | 2.59 ± 0.02 | –3.2 ± 0.7 | 0.009 |