Preparation of Ti/SnO2-Sb/Rare Earth Electrodes Containing Different Contents of Ni Intermediate Layer for Efficient Electrochemical Decolorization of Rhodamine B
Table 11
Energy per order of decolorized 20 mg·L−1 RhB solution, evaluated from equation (5), and electrochemical decolorization of Ti/SnO2-Sb-Ni/Re electrodes with various Ni contents 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 (0%)/Gd
0.0316
4.2
4.253
Ni (1%)/Gd
0.0554
4.2
2.426
Ni (2%)/Gd
0.2094
4.1
0.627
Ni (3.5%)/Gd
0.0366
4.1
3.585
Ni (5%)/Gd
0.0322
4
3.975
Ni (0%)/Ce
0.0476
4.1
2.756
Ni (1%)/Ce
0.0817
4.2
1.645
Ni (2%)/Ce
0.109
4.1
1.204
Ni (3.5%)/Ce
0.0409
4
3.129
Ni (5%)/Ce
0.0364
4
3.516
Ni (0%)/Eu
0.0539
4.2
2.494
Ni (1%)/Eu
0.0634
4.2
2.119
Ni (2%)/Eu
0.1727
4.1
0.759
Ni (3.5%)/Eu
0.0361
4.2
3.723
Ni (5%)/Eu
0.0084
4
15.238
Ni (0%)/Er
0.0618
4.2
2.175
Ni (1%)/Er
0.0797
4.1
1.646
Ni (2%)/Er
0.1486
4.2
0.904
Ni (3.5%)/Er
0.0477
4
2.683
Ni (5%)/Er
0.0557
4
2.298
Current intensity = 10 mA·cm−2, electrolyte = 0.1 mol·L−1 Na2SO4, and temperature = 25°C.