Investigation on the Adsorption and Photooxidation of Glycerol at TiO₂ Nanotubular Arrays

Table 5

Circuit parameters obtained by fitting the experimental impedance results with the selected equivalent circuit. Data obtained in the dark at the OCV potential, as a function of the adsorption (𝑡_ads) and desorption (𝑡_des) times.

	𝐶𝑓 (𝜇F cm^−2)	𝑅𝑓 (Ω cm^2)	𝐶2 (𝜇F cm^−2)	𝑅2 (Ω cm^2)	𝜏2 (s)	𝑌0 (mS s^0.5 cm^−2)
KOH	0.031	11.83	940	6939	6.5	8.8
𝑡ads=0	0.026	12.15	939	7349	6.90	6.5
𝑡ads=4 h	0.19	12.5	1200	10600	12.74	14.6
𝑡ads=20 h	0.021	16.11	900	4956	4.46	4.95
𝑡des=40 h	0.02	12.36	206	13100	2.70	3.01