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

Table 1

Coating composition of the electrodes (at. %).

Element	Percentage of element
	Ti/SnO2-Sb-Ni (2%)/Gd	Ti/SnO2-Sb-Ni (2%)/Ce	Ti/SnO2-Sb-Ni (2%)/Eu	Ti/SnO2-Sb-Ni (2%)/Er
O	28.76	27.61	27.95	25.81
Sn	57.94	54.94	55.20	58.28
Sb	3.91	12.09	4.58	5.22
Ni	0.12	0.32	0.38	0.74
Gd	9.27	0.00	0.00	0.00
Ce	0.00	5.03	0.00	0.00
Eu	0.00	0.00	11.88	0.00
Er	0.00	0.00	0.00	9.95