Table 3 Evaluation of EXAFS refinement of dehydrated VxOy/SBA-15.
Type R [Å] σ2 [Å2] | Procedure #1 | Procedure #2 | |||||
|---|---|---|---|---|---|---|---|
N | Z | ± z | F | Z | ± z | F | |
R(V-O) | 4(2) | 1.81 | 0.11 | 0.7 | 1.78 | 0.005 | 0 |
σ2(V-O) | 4 | 0.0066 | 0.0047 | 0.7 | 0.0075 | 0.0004 | 0 |
R(V-O) | -(2) | 1.75 | 0.04 | 0.4 | - | - | |
R(V-O) | 1 | 2.89 | 0.01 | 0.5 | 2.90 | 0.011 | 0 |
σ2(V-O) | 1 | 0.0014 | 0.0017 | 0.9 | 0.0017 | 0.0018 | 0.7 |
R(V-V) | 1 | 3.29 | 0.017 | 0 | 3.29 | 0.016 | 0 |
σ2(V-V) | 2 | 0.0135 | 0.0203 | 0.7 | 0.0135 | 0.00035 | 0.3 |
R(V-V) | 1 | 3.61 | 0.019 | 0 | 3.62 | 0.024 | 0 |
R(V-Si) | 1 | 2.54 | 0.01 | 0 | 2.54 | 0.011 | 0 |
σ2(V-Si) | 1 | 0.0115 | 0.0011 | 0.3 | 0.0121 | 0.0011 | 0 |
E0 | - | -0.9 | -0.3 | 0.8 | - | - | - |