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

Table 2

Kinetic parameters of 20 mg·L⁻¹ RhB in electrochemical processes by Ti/SnO₂-Sb-Ni/Gd electrodes modified with various Ni contents.

	Ni (0%)/Gd	Ni (1%)/Gd	Ni (2%)/Gd	Ni (3.5%)/Gd	Ni (5%)/Gd
Rate constants (k) (min^−1)	0.0316	0.0554	0.2094	0.0366	0.0322
R^2	0.988	0.9863	0.9908	0.9713	0.9744