Table 1. Fit Results the EXAFS Spectra of Pt/Al₂O₃ Samples Prepared under Different Conditions^a.

	Pt–O			Pt–Pt			Pt–Al
sample	CNPt–O	R (Å)	σ2 (Å2)	CNPt–Pt	R (Å)	σ2 (Å2)	CNPt–Al	R (Å)	σ2 (Å2)
Pt foil				12	2.77
PtO2	6	1.99
0.2Pt/Al2O3-SAb	6.2 ± 0.9	2.00 ± 0.01	0.003 ± 0.002				3 ± 2	2.92 ± 0.05	0.01
0.2Pt/Al2O3-200H2b	5.7 ± 0.9	1.99 ± 0.01	0.002 ± 0.002				2 ± 1	2.90 ± 0.07	0.01
0.2Pt/Al2O3-450H2b	3.0 ± 0.6	2.01 ± 0.01	0.003 ± 0.003	3 ± 1	2.76 ± 0.03	0.01
0.2Pt/Al2O3-200H2-in situc	2.0 ± 0.5	1.99 ± 0.01	0.003 ± 0.003	5 ± 2	2.75 ± 0.02	0.009 ± 0.004
0.2Pt/Al2O3-450H2-in situc	2 ± 1	2.01 ± 0.04	0.01 ± 0.02	7 ± 2	2.72 ± 0.01	0.009 ± 0.003

^aΔE₀ = 9, R_factor = 0.7. To decrease the number of parameters, the Debye–Waller (σ²) was kept free but the same for all paths with exception of the second shell contribution in the Pt/Al₂O₃ samples measured directly. In this case, it was fixed to 0.01.

^bThe sample was directly measured by XAS without any treatment.

^cThe sample was reduced by H₂ at a given temperature before the XAS measurement.