Preparation of Ti/SnO₂-Sb/Rare Earth Electrodes Containing Different Contents of Ni Intermediate Layer for Efficient Electrochemical Decolorization of Rhodamine B

Table 9

Kinetic parameters of 40 mg·L⁻¹ RhB in electrochemical processes by Ti/SnO₂-Sb-Ni/Er electrodes modified with various Ni contents.

	Ni (0%)/Er	Ni (1%)/Er	Ni (2%)/Er	Ni (3.5%)/Er	Ni (5%)/Er
Rate constants (k) (min^−1)	0.02	0.038	0.0554	0.0142	0.0173
R^2	0.989	0.9959	0.9949	0.9709	0.9904