Table 2.

Zn K-edge XANES and EXAFS fit parameters of Zn/HZSM-5 samples.

Samples	E0	Zn K-Edge EXAFS Fit Parameters a
		Contribution	CN	R (Å)	σ2	R Factor
Fresh Zn/HZSM-5	9664.43	Zn-O	6.49	2.03	0.013	0.005
Used Zn/HZSM-5 (pure C2=)	9663.48	Zn-O	3.66	1.97	0.009	0.006
Used Zn/HZSM-5 (C2=:H2O = 3:1)	9663.50	Zn-O	4.04	1.98	0.008	0.004
Used Zn/HZSM-5 (C2=:H2O = 3:2)	9663.76	Zn-O	4.76	1.99	0.010	0.004
Used Zn/HZSM-5 (C2=:H2O = 1:1)	9664.42	Zn-O	6.09	2.03	0.001	0.005
Used Zn/HZSM-5 (C2=:N2 = 3:1)	9663.41	Zn-O	3.74	1.97	0.009	0.005

^a: CN: coordination number; R: distance between absorber and back scatterer atoms; σ²: Debye–Waller factor; R-factor: ${\sum }_i{\left({data}_i-{fit}_i\right)}^2/{\left({data}_i\right)}^2$.