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

Table 13

Energy per order of decolorized 100 mg·L⁻¹ RhB solution, evaluated from equation (5), and electrochemical decolorization of Ti/SnO₂-Sb-Ni/Re electrodes with Ni (2%) content and different rare earth elements in 200 ml dye solution.

Electrodes	kapp (min^−1)	Average voltage (V)	Energy (kW·h·m^−3·order^−1)
Ni (2%)/Gd	0.038	4.3	3.621
Ni (2%)/Ce	0.0218	4.3	6.312
Ni (2%)/Eu	0.0285	4.4	4.940
Ni (2%)/Er	0.0274	4.4	5.138

Current intensity = 10 mA cm⁻², electrolyte = 0.1 mol. L⁻¹ Na₂SO₄, and temperature = 25°C.