In Situ Dispersive EXAFS in Electrocatalysis: The Investigation of the Local Structure of IrO_x in Chronoamperometric Conditions as a Case Study

Table 1

EXAFS fitting parameters obtained for spectra acquired at 0.23, 5.2, 10.0, and 34.8 s in acidic medium; : distances; : distance variances; : crystallographic values; the coordination numbers have been kept constant to their crystallographic values.

0.23 s						5.2 s
Shell		Atom	(Å)	(Å^2)	(Å)^*	Shell		Atom	(Å)	(Å^2)	(Å)^*
1	2	O	1.64 ()	3 () * 10^−2	1.943	1	2	O	1.65 ()	3 () * 10^−2	1.943
2	4	O	1.88 ()	0 () * 10^−3	1.980	2	4	O	1.89 ()	0 () * 10^−3	1.980
3	2	Ir	3.110	3 () * 10^−2	3.110	3	2	Ir	3.110	2 () * 10^−2	3.110
4	4	O	3.406	1 () * 10^−2	3.406	4	4	O	3.406	1 () * 10^−2	3.406
10.0 s						34.8 s
Shell		Atom	(Å)	(Å^2)	(Å)^*	Shell		Atom	(Å)	(Å^2)	(Å)^*
1	2	O	1.70 ()	4 () * 10^−2	1.943	1	2	O	1.70 ()	4 () * 10^−2	1.943
2	4	O	1.91 ()	0 () * 10^−3	1.980	2	4	O	1.90 ()	1 () * 10^−3	1.980
3	2	Ir	3.110	0 () * 10^−2	3.110	3	2	Ir	3.110	1 () * 10^−2	3.110
4	4	O	3.406	1 () * 10^−2	3.406	4	4	O	3.406	1 () * 10^−2	3.406