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

Table 10

Kinetic parameters of 100 mg·L⁻¹ RhB in electrochemical processes by Ti/SnO₂-Sb-Ni/Re (Re = Gd, Ce, Eu, Er) electrodes modified with Ni (2%) content.

	Ni (2%)/Gd	Ni (2%)/Ce	Ni (2%)/Eu	Ni (2%)/Er
Rate constants (k) (min^−1)	0.038	0.0218	0.0285	0.0274
R^2	0.9981	0.9991	0.9991	0.9995